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    <title>topic Re: Lens compatibility with my SLR 35mm film camera in EF &amp; RF Lenses</title>
    <link>https://community.usa.canon.com/t5/EF-RF-Lenses/Lens-compatibility-with-my-SLR-35mm-film-camera/m-p/500469#M33365</link>
    <description>&lt;P&gt;Yes that is the perfect lens for your EOS 35mm film camera. Canon USA has a lineup of videos to better assist you on camera and lens types on their YouTube channel. In YouTube search up "&lt;STRONG&gt;Canon EF 101 Series&lt;/STRONG&gt;" there are 9 videos in this series.&lt;div class="video-embed-center video-embed"&gt;&lt;iframe class="embedly-embed" src="https://cdn.embedly.com/widgets/media.html?src=https%3A%2F%2Fwww.youtube.com%2Fembed%2FyqLzojwK5ik%3Ffeature%3Doembed&amp;amp;display_name=YouTube&amp;amp;url=https%3A%2F%2Fwww.youtube.com%2Fwatch%3Fv%3DyqLzojwK5ik&amp;amp;image=https%3A%2F%2Fi.ytimg.com%2Fvi%2FyqLzojwK5ik%2Fhqdefault.jpg&amp;amp;type=text%2Fhtml&amp;amp;schema=youtube" width="600" height="337" scrolling="no" title="Canon EF 101: Series Overview" frameborder="0" allow="autoplay; fullscreen; encrypted-media; picture-in-picture;" allowfullscreen="true"&gt;&lt;/iframe&gt;&lt;/div&gt;&lt;/P&gt;
&lt;P&gt;&lt;span class="lia-inline-image-display-wrapper lia-image-align-inline" image-alt="Lens Compatability New.png" style="width: 999px;"&gt;&lt;img src="https://community.usa.canon.com/t5/image/serverpage/image-id/58522iACE8561E2D1115F8/image-size/large?v=v2&amp;amp;px=999" role="button" title="Lens Compatability New.png" alt="Lens Compatability New.png" /&gt;&lt;/span&gt;&lt;/P&gt;
&lt;UL&gt;
&lt;LI&gt;&lt;STRONG&gt;EOS:&lt;SPAN&gt;&amp;nbsp;&lt;/SPAN&gt;&lt;/STRONG&gt;&lt;SPAN&gt;Electro Optical System (What EOS stands for)&lt;/SPAN&gt;&lt;/LI&gt;
&lt;LI&gt;&lt;STRONG&gt;EF:&lt;SPAN&gt;&amp;nbsp;&lt;/SPAN&gt;&lt;/STRONG&gt;&lt;SPAN&gt;Electronic Focus: lens mount ALL EOS DSLRs &amp;amp; Film SLRs use (original EOS Mount) (Red Circle Mounting Index, 12 o’clock position)&lt;/SPAN&gt;&lt;/LI&gt;
&lt;LI&gt;&lt;STRONG&gt;EF-S:&lt;SPAN&gt;&amp;nbsp;&lt;/SPAN&gt;&lt;/STRONG&gt;&lt;SPAN&gt;A separate lens Mount designed for APS-C DSLRs&amp;nbsp;&lt;/SPAN&gt;&lt;U&gt;&lt;STRONG&gt;NOT compatible and won’t mount&lt;/STRONG&gt;&lt;/U&gt;&lt;SPAN&gt;&amp;nbsp;to any Full Frame Digital, 35mm Film SLRs or APS-H DSLRs.&amp;nbsp;&lt;/SPAN&gt;&lt;U&gt;&lt;STRONG&gt;Note this is a DSLR Crop Sensor ONLY Mount.&lt;/STRONG&gt;&lt;/U&gt;&lt;SPAN&gt;&amp;nbsp;(White Square Mounting Index, 1 o’clock position)&lt;/SPAN&gt;&lt;/LI&gt;
&lt;LI&gt;&lt;STRONG&gt;EF-M:&lt;SPAN&gt;&amp;nbsp;&lt;/SPAN&gt;&lt;/STRONG&gt;&lt;SPAN&gt;Lens Mount for EOS-M series Mirrorless cameras.&lt;/SPAN&gt;&lt;SPAN&gt;&amp;nbsp;&lt;/SPAN&gt;&lt;U&gt;&lt;STRONG&gt;Incompatible with DSLRs or EOS Film SLRs &amp;amp; EOS R Series&lt;/STRONG&gt;&lt;/U&gt;&lt;SPAN&gt;&lt;U&gt;.&lt;/U&gt;&amp;nbsp;(White Circle Mounting Index, 11 o’clock position) (2012-2023,&amp;nbsp;&lt;U&gt;&lt;STRONG&gt;DISCONTINUED&lt;/STRONG&gt;&lt;/U&gt;&lt;/SPAN&gt;&lt;SPAN&gt;).&amp;nbsp;&lt;/SPAN&gt;&lt;/LI&gt;
&lt;LI&gt;&lt;STRONG&gt;RF:&lt;SPAN&gt;&amp;nbsp;&lt;/SPAN&gt;&lt;/STRONG&gt;&lt;SPAN&gt;Lens Mount for EOS R series Mirrorless cameras.&amp;nbsp;&lt;/SPAN&gt;&lt;U&gt;&lt;STRONG&gt;ALL RF &amp;amp; RF-S lenses use focus by wire for Full Time Manual Focus. Regardless of USM or STM in the name.&lt;/STRONG&gt;&lt;SPAN&gt;&amp;nbsp;&lt;/SPAN&gt;&lt;STRONG&gt;Incompatible with EOS DSLRs or EOS Film SLRs.&lt;/STRONG&gt;&lt;/U&gt;&lt;SPAN&gt;&amp;nbsp;(Red Oval Mounting Index, 12 o’clock position)&lt;/SPAN&gt;&lt;/LI&gt;
&lt;LI&gt;&lt;STRONG&gt;RF-S:&lt;SPAN&gt;&amp;nbsp;&lt;/SPAN&gt;&lt;/STRONG&gt;&lt;U&gt;&lt;STRONG&gt;Lens is optimized for EOS R series APS-C cameras.&lt;/STRONG&gt;&lt;/U&gt;&lt;SPAN&gt;&amp;nbsp;Can be used on EOS R series Full Frame cameras but the image is cropped to the APS-C image circle.&amp;nbsp;&lt;/SPAN&gt;&lt;U&gt;&lt;STRONG&gt;Note this is NOT a separate lens mount.&lt;/STRONG&gt;&lt;/U&gt;&lt;/LI&gt;
&lt;LI&gt;&lt;STRONG&gt;Full Frame Digital:&lt;SPAN&gt;&amp;nbsp;&lt;/SPAN&gt;&lt;/STRONG&gt;&lt;SPAN&gt;Image sensor is the same size as a single negative of 35mm Film which measures 36x24.&lt;/SPAN&gt;&lt;/LI&gt;
&lt;LI&gt;&lt;STRONG&gt;APS-H (Advanced Photo System Half Frame):&lt;SPAN&gt;&amp;nbsp;&lt;/SPAN&gt;&lt;/STRONG&gt;&lt;SPAN&gt;Image sensor is 1.3x smaller than 35mm Film. An APS-H image sensor measures (27.7x18.5). This format was previously used by Canon in older 1D series cameras.&lt;/SPAN&gt;&lt;/LI&gt;
&lt;LI&gt;&lt;STRONG&gt;APS-C (Advanced Photo System Classic):&lt;SPAN&gt;&amp;nbsp;&lt;/SPAN&gt;&lt;/STRONG&gt;&lt;SPAN&gt;Image sensor is 1.5 or 1.6x smaller than 35mm Film. An APS-C image sensor measures 22.6x15 Canon uses a 1.6x crop factor.&lt;/SPAN&gt;&lt;/LI&gt;
&lt;LI&gt;&lt;STRONG&gt;&lt;FONT color="#FF0000"&gt;L&lt;/FONT&gt;:&lt;/STRONG&gt;&lt;SPAN&gt;&amp;nbsp;&lt;/SPAN&gt;&lt;SPAN&gt;Canon's professional grade lenses only available in Full Frame lenses&amp;nbsp;&lt;/SPAN&gt;&lt;U&gt;&lt;STRONG&gt;NO&lt;/STRONG&gt;&lt;/U&gt;&lt;SPAN&gt;&amp;nbsp;&lt;/SPAN&gt;&lt;SPAN&gt;APS-C lenses available. Lens has a&amp;nbsp;&lt;STRONG&gt;&lt;FONT color="#FF0000"&gt;RED&lt;/FONT&gt;&lt;/STRONG&gt;&amp;nbsp;ring on the lens barrel.&lt;/SPAN&gt;&lt;/LI&gt;
&lt;LI&gt;&lt;STRONG&gt;&lt;FONT color="#008000"&gt;DO&lt;/FONT&gt;:&lt;SPAN&gt;&amp;nbsp;&lt;/SPAN&gt;&lt;/STRONG&gt;&lt;SPAN&gt;Diffractive Optics uses Fresnel lenses. Lens has a&amp;nbsp;&lt;STRONG&gt;&lt;FONT color="#008000"&gt;GREEN&lt;/FONT&gt;&lt;/STRONG&gt;&amp;nbsp;ring on the lens barrel.&lt;/SPAN&gt;&lt;/LI&gt;
&lt;LI&gt;&lt;STRONG&gt;I, II, III, IV, V:&lt;SPAN&gt;&amp;nbsp;&lt;/SPAN&gt;&lt;/STRONG&gt;&lt;SPAN&gt;Some lenses have multiple revisions such as the&amp;nbsp;&lt;/SPAN&gt;&lt;U&gt;&lt;STRONG&gt;EF 28-80 F/3.5-5.6 V USM (ONLY lens to have a Version V)&lt;/STRONG&gt;&lt;/U&gt;&lt;/LI&gt;
&lt;LI&gt;&lt;STRONG&gt;Ring Type USM:&lt;SPAN&gt;&amp;nbsp;&lt;/SPAN&gt;&lt;/STRONG&gt;&lt;SPAN&gt;AF motor type. Provides fast focusing stands for Ultrasonic Motor. Ring Type USM is the original USM AF motor. Shaped like a ring inside the lens. Allows Full Time Manual Focus either Focus by Wire or mechanical.&amp;nbsp;&lt;/SPAN&gt;&lt;U&gt;&lt;STRONG&gt;ALL RF Mount lenses use focus by wire for Full Time Manual Focus.&lt;/STRONG&gt;&lt;/U&gt;&lt;/LI&gt;
&lt;LI&gt;&lt;STRONG&gt;Micro Motor USM:&lt;SPAN&gt;&amp;nbsp;&lt;/SPAN&gt;&lt;/STRONG&gt;&lt;SPAN&gt;Cheaper and slower AF Motor doesn't allow Full Time Manual Focus. Lens uses gears to adjust focus.&amp;nbsp;&lt;/SPAN&gt;&lt;U&gt;&lt;STRONG&gt;EXCEPT for the EF 50mm F/1.4 USM lens (refer to Ring Type USM Mechanical Focus override)&lt;/STRONG&gt;&lt;STRONG&gt;.&lt;SPAN&gt;&amp;nbsp;&lt;/SPAN&gt;&lt;/STRONG&gt;&lt;STRONG&gt;EF/ EF-S Mount ONLY.&lt;/STRONG&gt;&lt;/U&gt;&lt;SPAN&gt;&amp;nbsp;&lt;/SPAN&gt;&lt;SPAN&gt;(1993-2008 retired, replaced by Nano USM)&lt;/SPAN&gt;&lt;/LI&gt;
&lt;LI&gt;&lt;STRONG&gt;Nano USM:&lt;/STRONG&gt;&lt;SPAN&gt;&amp;nbsp;Combines STM and Ring Type USM technology for fast AF. Allows Full Time Manual Focus is Focus by wire. (2016- Present)&lt;/SPAN&gt;&lt;/LI&gt;
&lt;LI&gt;&lt;STRONG&gt;STM:&lt;SPAN&gt;&amp;nbsp;&lt;/SPAN&gt;&lt;/STRONG&gt;&lt;SPAN&gt;Stepper Motor for quiet AF. Allows Full Time Manual Focus which is Focus by Wire.&amp;nbsp;&lt;/SPAN&gt;&lt;U&gt;&lt;STRONG&gt;ALL EF-M lenses used an STM AF motor.&lt;/STRONG&gt;&lt;SPAN&gt;&amp;nbsp;&lt;/SPAN&gt;&lt;STRONG&gt;RF 10-20mm F4&lt;/STRONG&gt;&lt;FONT color="#FF0000"&gt;&lt;STRONG&gt;L&lt;/STRONG&gt;&lt;/FONT&gt;&lt;STRONG&gt;&lt;SPAN&gt;&amp;nbsp;&lt;/SPAN&gt;IS STM&lt;/STRONG&gt;&lt;/U&gt;&lt;SPAN&gt;&amp;nbsp;&lt;/SPAN&gt;&lt;SPAN&gt;(First&amp;nbsp;&lt;/SPAN&gt;&lt;FONT color="#FF0000"&gt;&lt;STRONG&gt;L&lt;SPAN&gt;&amp;nbsp;&lt;/SPAN&gt;&lt;/STRONG&gt;&lt;/FONT&gt;&lt;SPAN&gt;series lens to use an STM AF Motor) (2012- Present)&amp;nbsp;&lt;U&gt;&lt;STRONG&gt;RF 28-70mm F/2.8 IS STM&lt;/STRONG&gt;&lt;/U&gt;&amp;nbsp;(First constant aperture STM zoom lens)&lt;/SPAN&gt;&lt;/LI&gt;
&lt;LI&gt;&lt;STRONG&gt;AFD:&lt;SPAN&gt;&amp;nbsp;&lt;/SPAN&gt;&lt;/STRONG&gt;&lt;SPAN&gt;Arc-Form Drive original EOS AF motor. No longer in use was replaced by Micro Motor in 1993 for new lens designs. No Full Time Manual Focus.&amp;nbsp;&lt;/SPAN&gt;&lt;U&gt;&lt;STRONG&gt;ONLY used in the EF Mount NO EF-S, EF-M or RF Mount lenses.&lt;/STRONG&gt;&lt;/U&gt;&lt;SPAN&gt;&amp;nbsp;(Retired 1987-1992)&lt;/SPAN&gt;&lt;/LI&gt;
&lt;LI&gt;&lt;STRONG&gt;Micro Motor:&lt;SPAN&gt;&amp;nbsp;&lt;/SPAN&gt;&lt;/STRONG&gt;&lt;SPAN&gt;Older least advanced AF motor slower AF used in cheaper lenses. No Full Time Manual Focus.&amp;nbsp;&lt;/SPAN&gt;&lt;U&gt;&lt;STRONG&gt;ONLY used in the EF/ EF-S Mount.&lt;/STRONG&gt;&lt;/U&gt;&lt;SPAN&gt;&amp;nbsp;(Retired, 1993-2012) Replaced by STM in 2012.&lt;/SPAN&gt;&lt;/LI&gt;
&lt;LI&gt;&lt;STRONG&gt;VCM:&lt;/STRONG&gt;&amp;nbsp;Voice Coil Motor provides fast AF. The&amp;nbsp;&lt;U&gt;&lt;STRONG&gt;RF 35mm F/1.4&lt;FONT color="#FF0000"&gt;L&lt;/FONT&gt;&lt;SPAN&gt;&amp;nbsp;&lt;/SPAN&gt;VCM&lt;/STRONG&gt;&lt;/U&gt;&lt;SPAN&gt;&amp;nbsp;&lt;/SPAN&gt;is the first lens to use this new AF motor.&lt;/LI&gt;
&lt;LI&gt;&lt;STRONG&gt;IS:&lt;SPAN&gt;&amp;nbsp;&lt;/SPAN&gt;&lt;/STRONG&gt;&lt;SPAN&gt;Image Stabilization available in the lens.&lt;/SPAN&gt;&lt;/LI&gt;
&lt;LI&gt;&lt;STRONG&gt;IBIS:&lt;SPAN&gt;&amp;nbsp;&lt;/SPAN&gt;&lt;/STRONG&gt;&lt;SPAN&gt;In Body Image Stabilization available in select EOS R Series cameras.&lt;/SPAN&gt;&lt;/LI&gt;
&lt;LI&gt;&lt;STRONG&gt;Macro:&lt;SPAN&gt;&amp;nbsp;&lt;/SPAN&gt;&lt;/STRONG&gt;&lt;SPAN&gt;A macro lens with 1:1 magnification&lt;/SPAN&gt;&lt;/LI&gt;
&lt;LI&gt;&lt;STRONG&gt;Compact Macro:&lt;SPAN&gt;&amp;nbsp;&lt;/SPAN&gt;&lt;/STRONG&gt;&lt;SPAN&gt;Lens is able to focus closer than a normal macro lens.&lt;/SPAN&gt;&lt;/LI&gt;
&lt;LI&gt;&lt;STRONG&gt;MP-E:&lt;SPAN&gt;&amp;nbsp;&lt;/SPAN&gt;&lt;/STRONG&gt;&lt;SPAN&gt;Manual Focus only electronic aperture control no focus to infinity.&lt;/SPAN&gt;&lt;/LI&gt;
&lt;LI&gt;&lt;STRONG&gt;TS-E:&lt;SPAN&gt;&amp;nbsp;&lt;/SPAN&gt;&lt;/STRONG&gt;&lt;SPAN&gt;Tilt Shift lens with electronic aperture control no Autofocus.&amp;nbsp;&lt;/SPAN&gt;&lt;/LI&gt;
&lt;LI&gt;&lt;STRONG&gt;Soft Focus:&lt;SPAN&gt;&amp;nbsp;&lt;/SPAN&gt;&lt;/STRONG&gt;&lt;SPAN&gt;Lens is designed to provide a creamy bokeh effect.&lt;/SPAN&gt;&lt;/LI&gt;
&lt;LI&gt;&lt;STRONG&gt;PZ:&lt;SPAN&gt;&amp;nbsp;&lt;/SPAN&gt;&lt;/STRONG&gt;&lt;SPAN&gt;Power Zoom lens. Only 1 lens released with this feature. Only the&amp;nbsp;&lt;/SPAN&gt;&lt;U&gt;&lt;STRONG&gt;EF 35-80mm F/4-5.6 PZ&lt;/STRONG&gt;&lt;/U&gt;&lt;SPAN&gt;&amp;nbsp;&lt;/SPAN&gt;&lt;SPAN&gt;lens used this.&amp;nbsp;&lt;/SPAN&gt;&lt;/LI&gt;
&lt;LI&gt;&lt;STRONG&gt;TTL:&lt;SPAN&gt;&amp;nbsp;&lt;/SPAN&gt;&lt;/STRONG&gt;&lt;SPAN&gt;Through The Lens Flash metering. Flash system relies on light reflected off the film.&amp;nbsp;&lt;/SPAN&gt;&lt;U&gt;&lt;STRONG&gt;NOT compatible with EOS Digital cameras.&lt;/STRONG&gt;&lt;/U&gt;&lt;/LI&gt;
&lt;LI&gt;&lt;STRONG&gt;A-TTL:&lt;SPAN&gt;&amp;nbsp;&lt;/SPAN&gt;&lt;/STRONG&gt;&lt;SPAN&gt;Advanced Through The Lens Flash metering system in EOS film bodies released in 1986 with the FD Mount T90 SLR. Replaced by&amp;nbsp;&lt;/SPAN&gt;&lt;U&gt;&lt;STRONG&gt;E-TTL&lt;SPAN&gt;&amp;nbsp;&lt;/SPAN&gt;&lt;/STRONG&gt;&lt;/U&gt;&lt;SPAN&gt;in 1995. System uses a pre-flash measured by a sensor on the speedlite itself.&lt;/SPAN&gt;&lt;SPAN&gt;&amp;nbsp;&lt;/SPAN&gt;&lt;U&gt;&lt;STRONG&gt;NOT compatible&lt;/STRONG&gt;&lt;/U&gt;&lt;SPAN&gt;&amp;nbsp;with EOS Digital cameras. Uses EZ series speedlites.&lt;/SPAN&gt;&lt;/LI&gt;
&lt;LI&gt;&lt;STRONG&gt;E-TTL Version 1:&lt;SPAN&gt;&amp;nbsp;&lt;/SPAN&gt;&lt;/STRONG&gt;&lt;SPAN&gt;Evaluative Through The lens Flash metering system. System uses a pre-flash measured by the camera body to calculate flash exposure. System also relies on AF point selection too. Compatible with EX or EL series speedlites. Replaced by E-TTL II in 2004.&lt;/SPAN&gt;&lt;/LI&gt;
&lt;LI&gt;&lt;STRONG&gt;E-TTL II:&lt;SPAN&gt;&amp;nbsp;&lt;/SPAN&gt;&lt;/STRONG&gt;&lt;SPAN&gt;Refer to E-TTL Version 1. System was released in 2004 and works similarly to the original E-TTL. But uses focus distance information from the lens. Via a distance encoder in the lens. E-TTL II doesn't rely on AF point selection.&amp;nbsp;&lt;/SPAN&gt;&lt;U&gt;&lt;STRONG&gt;Note E-TTL II is IMPLEMENTED in the camera body NOT the speedlite.&lt;/STRONG&gt;&lt;/U&gt;&lt;/LI&gt;
&lt;LI&gt;&lt;STRONG&gt;EOS M Series&lt;/STRONG&gt;&lt;SPAN&gt;: A&amp;nbsp;&lt;/SPAN&gt;&lt;U&gt;&lt;STRONG&gt;discontinued&lt;/STRONG&gt;&lt;/U&gt;&lt;SPAN&gt;&amp;nbsp;APS-C mirrorless lineup of cameras (2012-2023). Replaced by EOS R Series APS-C cameras in 2023.&amp;nbsp;&lt;/SPAN&gt;&lt;U&gt;&lt;STRONG&gt;EF-M lenses&lt;/STRONG&gt;&lt;SPAN&gt;&amp;nbsp;&lt;/SPAN&gt;&lt;STRONG&gt;CAN NOT BE ADAPTED to EOS DSLRs or EOS R cameras.&lt;/STRONG&gt;&lt;/U&gt;&lt;/LI&gt;
&lt;LI&gt;&lt;STRONG&gt;EOS R Series:&lt;SPAN&gt;&amp;nbsp;&lt;/SPAN&gt;&lt;/STRONG&gt;&lt;SPAN&gt;Originally released in 2018 with Full Frame cameras only. Later in 2023 with APS-C cameras. New APS-C lenses were released.&amp;nbsp;&lt;/SPAN&gt;&lt;/LI&gt;
&lt;LI&gt;&lt;STRONG&gt;Z:&lt;SPAN&gt;&amp;nbsp;&lt;/SPAN&gt;&lt;/STRONG&gt;&lt;SPAN&gt;Lens has an optional attachment to allow power zoom.&amp;nbsp;&lt;/SPAN&gt;&lt;U&gt;&lt;STRONG&gt;RF 24-105mm F/2.8&lt;/STRONG&gt;&lt;FONT color="#FF0000"&gt;&lt;STRONG&gt;L&lt;/STRONG&gt;&lt;/FONT&gt;&lt;STRONG&gt;&lt;SPAN&gt;&amp;nbsp;&lt;/SPAN&gt;IS USM Z&lt;/STRONG&gt;&lt;/U&gt;&amp;nbsp;(first&amp;nbsp;&lt;SPAN&gt;lens has this feature).&lt;/SPAN&gt;&lt;/LI&gt;
&lt;LI&gt;&lt;STRONG&gt;Automatic Brightness Adjustment of LED AF Assist Beam:&lt;SPAN&gt;&amp;nbsp;&lt;/SPAN&gt;&lt;/STRONG&gt;&lt;SPAN&gt;Feature&amp;nbsp;&lt;/SPAN&gt;&lt;U&gt;&lt;STRONG&gt;IS NOT&lt;/STRONG&gt;&lt;SPAN&gt;&amp;nbsp;&lt;/SPAN&gt;&lt;STRONG&gt;SUPPORTED&lt;/STRONG&gt;&lt;/U&gt;&lt;SPAN&gt;&amp;nbsp;on the R3, R7 &amp;amp; R10 camera bodies when the&lt;/SPAN&gt;&lt;STRONG&gt;&lt;U&gt;&lt;SPAN&gt;&amp;nbsp;&lt;/SPAN&gt;speedlite EL-5 is used. LED AF Assist Beam is projected at FULL BRIGHTNESS ONLY. Or will switch to Intermittent Flash Firing&lt;/U&gt;.&lt;SPAN&gt;&amp;nbsp;&lt;/SPAN&gt;&lt;/STRONG&gt;&lt;SPAN&gt;All other cameras with a Multi-Function hot shoe will automatically adjust the LED AF Assist Beam depending on the ambient brightness.&lt;/SPAN&gt;&lt;/LI&gt;
&lt;/UL&gt;
&lt;UL&gt;
&lt;LI&gt;&lt;STRONG&gt;AF Assist Beam:&lt;SPAN&gt;&amp;nbsp;&lt;/SPAN&gt;&lt;/STRONG&gt;&lt;SPAN&gt;An AF Assist Lamp to aid the camera’s AF system in low light or low contrast situations.&lt;/SPAN&gt;&lt;/LI&gt;
&lt;/UL&gt;
&lt;UL&gt;
&lt;LI&gt;&lt;STRONG&gt;IR AF Assist Beam:&lt;SPAN&gt;&amp;nbsp;&lt;/SPAN&gt;&lt;/STRONG&gt;&lt;SPAN&gt;A red grid pattern projected by the speedlite to aid an SLR/ DSLR camera’s AF system. Note this red grid pattern&amp;nbsp;&lt;/SPAN&gt;&lt;U&gt;&lt;STRONG&gt;IS NOT&lt;/STRONG&gt;&lt;/U&gt;&lt;SPAN&gt;&amp;nbsp;Infrared. This AF Assist Beam type is compatible on all EOS SLRs &amp;amp; DSLRs. This type of AF Assist Beam&amp;nbsp;&lt;/SPAN&gt;&lt;U&gt;&lt;STRONG&gt;IS INCOMPATIBLE&lt;/STRONG&gt;&lt;/U&gt;&lt;SPAN&gt;&amp;nbsp;with mirrorless cameras.&lt;/SPAN&gt;&lt;/LI&gt;
&lt;/UL&gt;
&lt;UL&gt;
&lt;LI&gt;&lt;STRONG&gt;Intermittent Flash Firing AF Assist Beam:&lt;SPAN&gt;&amp;nbsp;&lt;/SPAN&gt;&lt;/STRONG&gt;&lt;SPAN&gt;Camera rapidly pulses the speedlite for AF Assist. This AF Assist Beam type&amp;nbsp;&lt;/SPAN&gt;&lt;U&gt;&lt;STRONG&gt;IS SUPPORTED ON ALL EX &amp;amp; EL&lt;/STRONG&gt;&lt;SPAN&gt;&amp;nbsp;&lt;/SPAN&gt;&lt;STRONG&gt;speedlites when used on the EOS R Series&lt;/STRONG&gt;&lt;/U&gt;&lt;SPAN&gt;&lt;U&gt;.&lt;/U&gt;&amp;nbsp;Note speedlites that have a&amp;nbsp;&lt;/SPAN&gt;&lt;U&gt;&lt;STRONG&gt;PERSONAL FUNCTION&lt;SPAN&gt;&amp;nbsp;&lt;/SPAN&gt;&lt;/STRONG&gt;&lt;/U&gt;&lt;SPAN&gt;for IR &amp;amp; Intermittent Flash Firing. Always use Intermittent Flash Firing on the EOS R series regardless of the projection method. When set to Intermittent Flash Firing. If a color filter or flash diffuser is used. The camera body emits an LED AF Assist Beam on the EOS R series. Intermittent Flash Firing is&amp;nbsp;&lt;/SPAN&gt;&lt;U&gt;&lt;STRONG&gt;DISABLED&lt;/STRONG&gt;&lt;/U&gt;&lt;SPAN&gt;&amp;nbsp;&lt;/SPAN&gt;&lt;SPAN&gt;when a color filter or flash diffuser is used. Speedlites without a&amp;nbsp;&lt;/SPAN&gt;&lt;U&gt;&lt;STRONG&gt;PERSONAL FUNCTION&lt;/STRONG&gt;&lt;/U&gt;&lt;SPAN&gt;&amp;nbsp;between IR and Intermittent Flash Firing. The speedlite&amp;nbsp;&lt;/SPAN&gt;&lt;U&gt;&lt;STRONG&gt;WILL&lt;/STRONG&gt;&lt;/U&gt;&lt;SPAN&gt;&amp;nbsp;use Intermittent Flash Firing on the EOS R series.&amp;nbsp;&lt;/SPAN&gt;&lt;U&gt;&lt;STRONG&gt;Note depending on the ambient lighting an AF Assist Beam may be projected by the camera body instead of the speedlite on the EOS R series.&lt;/STRONG&gt;&lt;/U&gt;&lt;SPAN&gt;&amp;nbsp;This AF Assist Beam type&amp;nbsp;&lt;/SPAN&gt;&lt;STRONG&gt;ONLY&lt;/STRONG&gt;&lt;SPAN&gt;&amp;nbsp;works on cameras released from 2007-onward.&amp;nbsp;&lt;/SPAN&gt;&lt;/LI&gt;
&lt;LI&gt;&lt;STRONG&gt;LED AF Assist Beam:&lt;SPAN&gt;&amp;nbsp;&lt;/SPAN&gt;&lt;/STRONG&gt;&lt;SPAN&gt;Bright white light (on a speedlite) or orange LED light (on an EOS R series camera body) that aids the camera for AF Assist. This AF Assist Beam type&amp;nbsp;&lt;/SPAN&gt;&lt;U&gt;&lt;STRONG&gt;ONLY&lt;/STRONG&gt;&lt;/U&gt;&lt;SPAN&gt;&amp;nbsp;works on cameras released from 2007-onward.&amp;nbsp;&lt;/SPAN&gt;&lt;/LI&gt;
&lt;/UL&gt;</description>
    <pubDate>Sat, 14 Sep 2024 17:15:18 GMT</pubDate>
    <dc:creator>deebatman316</dc:creator>
    <dc:date>2024-09-14T17:15:18Z</dc:date>
    <item>
      <title>Lens compatibility with my SLR 35mm film camera</title>
      <link>https://community.usa.canon.com/t5/EF-RF-Lenses/Lens-compatibility-with-my-SLR-35mm-film-camera/m-p/500367#M33354</link>
      <description>&lt;P&gt;I'm a very amateur photographer at this point and I recently purchased a Canon Rebel eos 2000, because I really wanted to start using 35mm film again. I thought it would be a decent camera to start with because I already have a Canon Rebel 3i and thought I could use the lenses I have for that camera already. I was only partly right, since I had overlooked that my EFS lenses will not work. Anyways I find myself wanting some new lenses for the rebel 2000 and found a pretty good deal on a Canon EF 16-35mm f/4L IS USM Lens(9518B002). Am I correct in thinking that it will work on that camera, and if so is it a good idea though? Sorry for the drawn out message. I appreciate any and all input/help anybody might have on the subject!!! Thank yo&lt;/P&gt;&lt;H1&gt;&amp;nbsp;&lt;/H1&gt;</description>
      <pubDate>Sat, 14 Sep 2024 01:31:03 GMT</pubDate>
      <guid>https://community.usa.canon.com/t5/EF-RF-Lenses/Lens-compatibility-with-my-SLR-35mm-film-camera/m-p/500367#M33354</guid>
      <dc:creator>Ter9985</dc:creator>
      <dc:date>2024-09-14T01:31:03Z</dc:date>
    </item>
    <item>
      <title>Re: Lens compatibility with my SLR 35mm film camera</title>
      <link>https://community.usa.canon.com/t5/EF-RF-Lenses/Lens-compatibility-with-my-SLR-35mm-film-camera/m-p/500372#M33355</link>
      <description>&lt;P&gt;Greetings,&lt;/P&gt;
&lt;P&gt;Any EF mount lens should work.&lt;/P&gt;</description>
      <pubDate>Sat, 14 Sep 2024 02:00:56 GMT</pubDate>
      <guid>https://community.usa.canon.com/t5/EF-RF-Lenses/Lens-compatibility-with-my-SLR-35mm-film-camera/m-p/500372#M33355</guid>
      <dc:creator>shadowsports</dc:creator>
      <dc:date>2024-09-14T02:00:56Z</dc:date>
    </item>
    <item>
      <title>Re: Lens compatibility with my SLR 35mm film camera</title>
      <link>https://community.usa.canon.com/t5/EF-RF-Lenses/Lens-compatibility-with-my-SLR-35mm-film-camera/m-p/500427#M33358</link>
      <description>&lt;P&gt;&lt;EM&gt;"Any EF mount lens should work."&lt;/EM&gt;&lt;/P&gt;
&lt;P&gt;&lt;SPAN&gt;But your specific question about the Canon EF 16-35mm f/4L IS USM, the answer is, if you want a GP lens, no, its not. It is a very wide angle to wide angle zoom lens if that is what you want then, yes. As I recall the&amp;nbsp;Canon Rebel 2000 shipped with a 35-80mm kit lens. That is what I would look for.&lt;/SPAN&gt;&lt;/P&gt;</description>
      <pubDate>Sat, 14 Sep 2024 15:09:44 GMT</pubDate>
      <guid>https://community.usa.canon.com/t5/EF-RF-Lenses/Lens-compatibility-with-my-SLR-35mm-film-camera/m-p/500427#M33358</guid>
      <dc:creator>ebiggs1</dc:creator>
      <dc:date>2024-09-14T15:09:44Z</dc:date>
    </item>
    <item>
      <title>Re: Lens compatibility with my SLR 35mm film camera</title>
      <link>https://community.usa.canon.com/t5/EF-RF-Lenses/Lens-compatibility-with-my-SLR-35mm-film-camera/m-p/500444#M33360</link>
      <description>&lt;P&gt;Close Ernie, but the &lt;STRONG&gt;EF 28-80mm F/3.5-5.6 II&lt;/STRONG&gt; lens was the kit lens with that camera. Later it was the&amp;nbsp;&lt;STRONG&gt;EF 28-90mm F/4-5.6&amp;nbsp;&lt;/STRONG&gt;lens lineup. Coincidentally the&amp;nbsp;&lt;STRONG&gt;EF-S 18-55mm&amp;nbsp;&lt;/STRONG&gt;lens lineup closes matches the old&amp;nbsp;&lt;STRONG&gt;EF 28-90mm&amp;nbsp;&lt;/STRONG&gt;field of view. I do agree with you that a better lens would be in the 24-80mm range such as the &lt;STRONG&gt;EF 24-105mm F/3.5-5.6 IS STM&amp;nbsp;&lt;/STRONG&gt;lens. Instead of a wide angle lens such as the&amp;nbsp;&lt;STRONG&gt;EF 16-35mm&amp;nbsp;&lt;/STRONG&gt;&lt;STRONG&gt;F/4&lt;FONT color="#FF0000"&gt;L&lt;/FONT&gt; IS USM&amp;nbsp;&lt;/STRONG&gt;lens. Unless the OP has a specific need for a wide angle lens.&amp;nbsp;&lt;/P&gt;</description>
      <pubDate>Sat, 14 Sep 2024 16:09:56 GMT</pubDate>
      <guid>https://community.usa.canon.com/t5/EF-RF-Lenses/Lens-compatibility-with-my-SLR-35mm-film-camera/m-p/500444#M33360</guid>
      <dc:creator>deebatman316</dc:creator>
      <dc:date>2024-09-14T16:09:56Z</dc:date>
    </item>
    <item>
      <title>Re: Lens compatibility with my SLR 35mm film camera</title>
      <link>https://community.usa.canon.com/t5/EF-RF-Lenses/Lens-compatibility-with-my-SLR-35mm-film-camera/m-p/500458#M33361</link>
      <description>&lt;P&gt;Thank for your response. To go a little further with this, I do have the&amp;nbsp;&lt;STRONG&gt;EF 28-80mm F/3.5-5.6 II&lt;/STRONG&gt; and I have a 50mm for it as well. I find myself wanting something different though when I am using the 28-80mm though. Maybe because a I like doing more landscape photography. I just don't like my field of view when using that lens. To be honest picking a lens just really confuses me though. I usually really understand how and why to things work, but the more I try to learn about lenses and how to choose one, the more confused I get. I think I would like the wide angle lens for all my outdoor shots ( ie. Sunsets, beach, mountains, city shots from a far). Am I correct in thinking it would work for those kind of shots and still look alright with 35mm film. I know it will work on the rebel 3i I have as well so that is atleast a positive, but I really want to focus on using my rebel 2000 since it is film. Thanks again for your time and I really appreciate it.&amp;nbsp;&lt;/P&gt;</description>
      <pubDate>Sat, 14 Sep 2024 16:43:46 GMT</pubDate>
      <guid>https://community.usa.canon.com/t5/EF-RF-Lenses/Lens-compatibility-with-my-SLR-35mm-film-camera/m-p/500458#M33361</guid>
      <dc:creator>Ter9985</dc:creator>
      <dc:date>2024-09-14T16:43:46Z</dc:date>
    </item>
    <item>
      <title>Re: Lens compatibility with my SLR 35mm film camera</title>
      <link>https://community.usa.canon.com/t5/EF-RF-Lenses/Lens-compatibility-with-my-SLR-35mm-film-camera/m-p/500462#M33362</link>
      <description>&lt;P&gt;The&amp;nbsp;&lt;STRONG&gt;&lt;U&gt;EF 16-35mm F/4&lt;FONT color="#FF0000"&gt;L&lt;/FONT&gt; IS USM&lt;/U&gt;&amp;nbsp;&lt;/STRONG&gt;lens on a crop sensor camera such as your T3i wouldn't be considered a wide angle lens. Due to the image sensor's 1.6x crop. The lens' Angle of View is 25.6-56mm to get an equivalent AOV on the Rebel would be an &lt;U&gt;&lt;STRONG&gt;EF-S 10-22mm F/3.5-4.5 USM&lt;/STRONG&gt;&lt;/U&gt; lens. The lens' focal length never changes the size of the image sensor causes the crop.&lt;/P&gt;</description>
      <pubDate>Sat, 14 Sep 2024 16:55:28 GMT</pubDate>
      <guid>https://community.usa.canon.com/t5/EF-RF-Lenses/Lens-compatibility-with-my-SLR-35mm-film-camera/m-p/500462#M33362</guid>
      <dc:creator>deebatman316</dc:creator>
      <dc:date>2024-09-14T16:55:28Z</dc:date>
    </item>
    <item>
      <title>Re: Lens compatibility with my SLR 35mm film camera</title>
      <link>https://community.usa.canon.com/t5/EF-RF-Lenses/Lens-compatibility-with-my-SLR-35mm-film-camera/m-p/500464#M33363</link>
      <description>&lt;P&gt;&lt;EM&gt;"&amp;nbsp;I like doing more landscape photography."&lt;/EM&gt;&lt;/P&gt;
&lt;P&gt;&lt;SPAN&gt;In that case the&amp;nbsp;&amp;nbsp;Canon EF 16-35mm f/4L IS USM Lens is made for you. It will also work on your T3i but will not be as wide.&lt;/SPAN&gt;&lt;/P&gt;</description>
      <pubDate>Sat, 14 Sep 2024 16:56:58 GMT</pubDate>
      <guid>https://community.usa.canon.com/t5/EF-RF-Lenses/Lens-compatibility-with-my-SLR-35mm-film-camera/m-p/500464#M33363</guid>
      <dc:creator>ebiggs1</dc:creator>
      <dc:date>2024-09-14T16:56:58Z</dc:date>
    </item>
    <item>
      <title>Re: Lens compatibility with my SLR 35mm film camera</title>
      <link>https://community.usa.canon.com/t5/EF-RF-Lenses/Lens-compatibility-with-my-SLR-35mm-film-camera/m-p/500466#M33364</link>
      <description>&lt;P&gt;&lt;EM&gt;"The&amp;nbsp;EF 16-35mm F/4&lt;FONT color="#FF0000"&gt;L&lt;/FONT&gt;&amp;nbsp;IS USM&amp;nbsp;lens on a crop sensor camera such as your T3i wouldn't be considered a wide angle lens."&lt;/EM&gt;&lt;/P&gt;
&lt;P&gt;&lt;SPAN&gt;Actually it would anything around 25mm, which would be the FL equivalent on a T3i, is WA.&lt;/SPAN&gt;&lt;/P&gt;</description>
      <pubDate>Sat, 14 Sep 2024 17:05:51 GMT</pubDate>
      <guid>https://community.usa.canon.com/t5/EF-RF-Lenses/Lens-compatibility-with-my-SLR-35mm-film-camera/m-p/500466#M33364</guid>
      <dc:creator>ebiggs1</dc:creator>
      <dc:date>2024-09-14T17:05:51Z</dc:date>
    </item>
    <item>
      <title>Re: Lens compatibility with my SLR 35mm film camera</title>
      <link>https://community.usa.canon.com/t5/EF-RF-Lenses/Lens-compatibility-with-my-SLR-35mm-film-camera/m-p/500469#M33365</link>
      <description>&lt;P&gt;Yes that is the perfect lens for your EOS 35mm film camera. Canon USA has a lineup of videos to better assist you on camera and lens types on their YouTube channel. In YouTube search up "&lt;STRONG&gt;Canon EF 101 Series&lt;/STRONG&gt;" there are 9 videos in this series.&lt;div class="video-embed-center video-embed"&gt;&lt;iframe class="embedly-embed" src="https://cdn.embedly.com/widgets/media.html?src=https%3A%2F%2Fwww.youtube.com%2Fembed%2FyqLzojwK5ik%3Ffeature%3Doembed&amp;amp;display_name=YouTube&amp;amp;url=https%3A%2F%2Fwww.youtube.com%2Fwatch%3Fv%3DyqLzojwK5ik&amp;amp;image=https%3A%2F%2Fi.ytimg.com%2Fvi%2FyqLzojwK5ik%2Fhqdefault.jpg&amp;amp;type=text%2Fhtml&amp;amp;schema=youtube" width="600" height="337" scrolling="no" title="Canon EF 101: Series Overview" frameborder="0" allow="autoplay; fullscreen; encrypted-media; picture-in-picture;" allowfullscreen="true"&gt;&lt;/iframe&gt;&lt;/div&gt;&lt;/P&gt;
&lt;P&gt;&lt;span class="lia-inline-image-display-wrapper lia-image-align-inline" image-alt="Lens Compatability New.png" style="width: 999px;"&gt;&lt;img src="https://community.usa.canon.com/t5/image/serverpage/image-id/58522iACE8561E2D1115F8/image-size/large?v=v2&amp;amp;px=999" role="button" title="Lens Compatability New.png" alt="Lens Compatability New.png" /&gt;&lt;/span&gt;&lt;/P&gt;
&lt;UL&gt;
&lt;LI&gt;&lt;STRONG&gt;EOS:&lt;SPAN&gt;&amp;nbsp;&lt;/SPAN&gt;&lt;/STRONG&gt;&lt;SPAN&gt;Electro Optical System (What EOS stands for)&lt;/SPAN&gt;&lt;/LI&gt;
&lt;LI&gt;&lt;STRONG&gt;EF:&lt;SPAN&gt;&amp;nbsp;&lt;/SPAN&gt;&lt;/STRONG&gt;&lt;SPAN&gt;Electronic Focus: lens mount ALL EOS DSLRs &amp;amp; Film SLRs use (original EOS Mount) (Red Circle Mounting Index, 12 o’clock position)&lt;/SPAN&gt;&lt;/LI&gt;
&lt;LI&gt;&lt;STRONG&gt;EF-S:&lt;SPAN&gt;&amp;nbsp;&lt;/SPAN&gt;&lt;/STRONG&gt;&lt;SPAN&gt;A separate lens Mount designed for APS-C DSLRs&amp;nbsp;&lt;/SPAN&gt;&lt;U&gt;&lt;STRONG&gt;NOT compatible and won’t mount&lt;/STRONG&gt;&lt;/U&gt;&lt;SPAN&gt;&amp;nbsp;to any Full Frame Digital, 35mm Film SLRs or APS-H DSLRs.&amp;nbsp;&lt;/SPAN&gt;&lt;U&gt;&lt;STRONG&gt;Note this is a DSLR Crop Sensor ONLY Mount.&lt;/STRONG&gt;&lt;/U&gt;&lt;SPAN&gt;&amp;nbsp;(White Square Mounting Index, 1 o’clock position)&lt;/SPAN&gt;&lt;/LI&gt;
&lt;LI&gt;&lt;STRONG&gt;EF-M:&lt;SPAN&gt;&amp;nbsp;&lt;/SPAN&gt;&lt;/STRONG&gt;&lt;SPAN&gt;Lens Mount for EOS-M series Mirrorless cameras.&lt;/SPAN&gt;&lt;SPAN&gt;&amp;nbsp;&lt;/SPAN&gt;&lt;U&gt;&lt;STRONG&gt;Incompatible with DSLRs or EOS Film SLRs &amp;amp; EOS R Series&lt;/STRONG&gt;&lt;/U&gt;&lt;SPAN&gt;&lt;U&gt;.&lt;/U&gt;&amp;nbsp;(White Circle Mounting Index, 11 o’clock position) (2012-2023,&amp;nbsp;&lt;U&gt;&lt;STRONG&gt;DISCONTINUED&lt;/STRONG&gt;&lt;/U&gt;&lt;/SPAN&gt;&lt;SPAN&gt;).&amp;nbsp;&lt;/SPAN&gt;&lt;/LI&gt;
&lt;LI&gt;&lt;STRONG&gt;RF:&lt;SPAN&gt;&amp;nbsp;&lt;/SPAN&gt;&lt;/STRONG&gt;&lt;SPAN&gt;Lens Mount for EOS R series Mirrorless cameras.&amp;nbsp;&lt;/SPAN&gt;&lt;U&gt;&lt;STRONG&gt;ALL RF &amp;amp; RF-S lenses use focus by wire for Full Time Manual Focus. Regardless of USM or STM in the name.&lt;/STRONG&gt;&lt;SPAN&gt;&amp;nbsp;&lt;/SPAN&gt;&lt;STRONG&gt;Incompatible with EOS DSLRs or EOS Film SLRs.&lt;/STRONG&gt;&lt;/U&gt;&lt;SPAN&gt;&amp;nbsp;(Red Oval Mounting Index, 12 o’clock position)&lt;/SPAN&gt;&lt;/LI&gt;
&lt;LI&gt;&lt;STRONG&gt;RF-S:&lt;SPAN&gt;&amp;nbsp;&lt;/SPAN&gt;&lt;/STRONG&gt;&lt;U&gt;&lt;STRONG&gt;Lens is optimized for EOS R series APS-C cameras.&lt;/STRONG&gt;&lt;/U&gt;&lt;SPAN&gt;&amp;nbsp;Can be used on EOS R series Full Frame cameras but the image is cropped to the APS-C image circle.&amp;nbsp;&lt;/SPAN&gt;&lt;U&gt;&lt;STRONG&gt;Note this is NOT a separate lens mount.&lt;/STRONG&gt;&lt;/U&gt;&lt;/LI&gt;
&lt;LI&gt;&lt;STRONG&gt;Full Frame Digital:&lt;SPAN&gt;&amp;nbsp;&lt;/SPAN&gt;&lt;/STRONG&gt;&lt;SPAN&gt;Image sensor is the same size as a single negative of 35mm Film which measures 36x24.&lt;/SPAN&gt;&lt;/LI&gt;
&lt;LI&gt;&lt;STRONG&gt;APS-H (Advanced Photo System Half Frame):&lt;SPAN&gt;&amp;nbsp;&lt;/SPAN&gt;&lt;/STRONG&gt;&lt;SPAN&gt;Image sensor is 1.3x smaller than 35mm Film. An APS-H image sensor measures (27.7x18.5). This format was previously used by Canon in older 1D series cameras.&lt;/SPAN&gt;&lt;/LI&gt;
&lt;LI&gt;&lt;STRONG&gt;APS-C (Advanced Photo System Classic):&lt;SPAN&gt;&amp;nbsp;&lt;/SPAN&gt;&lt;/STRONG&gt;&lt;SPAN&gt;Image sensor is 1.5 or 1.6x smaller than 35mm Film. An APS-C image sensor measures 22.6x15 Canon uses a 1.6x crop factor.&lt;/SPAN&gt;&lt;/LI&gt;
&lt;LI&gt;&lt;STRONG&gt;&lt;FONT color="#FF0000"&gt;L&lt;/FONT&gt;:&lt;/STRONG&gt;&lt;SPAN&gt;&amp;nbsp;&lt;/SPAN&gt;&lt;SPAN&gt;Canon's professional grade lenses only available in Full Frame lenses&amp;nbsp;&lt;/SPAN&gt;&lt;U&gt;&lt;STRONG&gt;NO&lt;/STRONG&gt;&lt;/U&gt;&lt;SPAN&gt;&amp;nbsp;&lt;/SPAN&gt;&lt;SPAN&gt;APS-C lenses available. Lens has a&amp;nbsp;&lt;STRONG&gt;&lt;FONT color="#FF0000"&gt;RED&lt;/FONT&gt;&lt;/STRONG&gt;&amp;nbsp;ring on the lens barrel.&lt;/SPAN&gt;&lt;/LI&gt;
&lt;LI&gt;&lt;STRONG&gt;&lt;FONT color="#008000"&gt;DO&lt;/FONT&gt;:&lt;SPAN&gt;&amp;nbsp;&lt;/SPAN&gt;&lt;/STRONG&gt;&lt;SPAN&gt;Diffractive Optics uses Fresnel lenses. Lens has a&amp;nbsp;&lt;STRONG&gt;&lt;FONT color="#008000"&gt;GREEN&lt;/FONT&gt;&lt;/STRONG&gt;&amp;nbsp;ring on the lens barrel.&lt;/SPAN&gt;&lt;/LI&gt;
&lt;LI&gt;&lt;STRONG&gt;I, II, III, IV, V:&lt;SPAN&gt;&amp;nbsp;&lt;/SPAN&gt;&lt;/STRONG&gt;&lt;SPAN&gt;Some lenses have multiple revisions such as the&amp;nbsp;&lt;/SPAN&gt;&lt;U&gt;&lt;STRONG&gt;EF 28-80 F/3.5-5.6 V USM (ONLY lens to have a Version V)&lt;/STRONG&gt;&lt;/U&gt;&lt;/LI&gt;
&lt;LI&gt;&lt;STRONG&gt;Ring Type USM:&lt;SPAN&gt;&amp;nbsp;&lt;/SPAN&gt;&lt;/STRONG&gt;&lt;SPAN&gt;AF motor type. Provides fast focusing stands for Ultrasonic Motor. Ring Type USM is the original USM AF motor. Shaped like a ring inside the lens. Allows Full Time Manual Focus either Focus by Wire or mechanical.&amp;nbsp;&lt;/SPAN&gt;&lt;U&gt;&lt;STRONG&gt;ALL RF Mount lenses use focus by wire for Full Time Manual Focus.&lt;/STRONG&gt;&lt;/U&gt;&lt;/LI&gt;
&lt;LI&gt;&lt;STRONG&gt;Micro Motor USM:&lt;SPAN&gt;&amp;nbsp;&lt;/SPAN&gt;&lt;/STRONG&gt;&lt;SPAN&gt;Cheaper and slower AF Motor doesn't allow Full Time Manual Focus. Lens uses gears to adjust focus.&amp;nbsp;&lt;/SPAN&gt;&lt;U&gt;&lt;STRONG&gt;EXCEPT for the EF 50mm F/1.4 USM lens (refer to Ring Type USM Mechanical Focus override)&lt;/STRONG&gt;&lt;STRONG&gt;.&lt;SPAN&gt;&amp;nbsp;&lt;/SPAN&gt;&lt;/STRONG&gt;&lt;STRONG&gt;EF/ EF-S Mount ONLY.&lt;/STRONG&gt;&lt;/U&gt;&lt;SPAN&gt;&amp;nbsp;&lt;/SPAN&gt;&lt;SPAN&gt;(1993-2008 retired, replaced by Nano USM)&lt;/SPAN&gt;&lt;/LI&gt;
&lt;LI&gt;&lt;STRONG&gt;Nano USM:&lt;/STRONG&gt;&lt;SPAN&gt;&amp;nbsp;Combines STM and Ring Type USM technology for fast AF. Allows Full Time Manual Focus is Focus by wire. (2016- Present)&lt;/SPAN&gt;&lt;/LI&gt;
&lt;LI&gt;&lt;STRONG&gt;STM:&lt;SPAN&gt;&amp;nbsp;&lt;/SPAN&gt;&lt;/STRONG&gt;&lt;SPAN&gt;Stepper Motor for quiet AF. Allows Full Time Manual Focus which is Focus by Wire.&amp;nbsp;&lt;/SPAN&gt;&lt;U&gt;&lt;STRONG&gt;ALL EF-M lenses used an STM AF motor.&lt;/STRONG&gt;&lt;SPAN&gt;&amp;nbsp;&lt;/SPAN&gt;&lt;STRONG&gt;RF 10-20mm F4&lt;/STRONG&gt;&lt;FONT color="#FF0000"&gt;&lt;STRONG&gt;L&lt;/STRONG&gt;&lt;/FONT&gt;&lt;STRONG&gt;&lt;SPAN&gt;&amp;nbsp;&lt;/SPAN&gt;IS STM&lt;/STRONG&gt;&lt;/U&gt;&lt;SPAN&gt;&amp;nbsp;&lt;/SPAN&gt;&lt;SPAN&gt;(First&amp;nbsp;&lt;/SPAN&gt;&lt;FONT color="#FF0000"&gt;&lt;STRONG&gt;L&lt;SPAN&gt;&amp;nbsp;&lt;/SPAN&gt;&lt;/STRONG&gt;&lt;/FONT&gt;&lt;SPAN&gt;series lens to use an STM AF Motor) (2012- Present)&amp;nbsp;&lt;U&gt;&lt;STRONG&gt;RF 28-70mm F/2.8 IS STM&lt;/STRONG&gt;&lt;/U&gt;&amp;nbsp;(First constant aperture STM zoom lens)&lt;/SPAN&gt;&lt;/LI&gt;
&lt;LI&gt;&lt;STRONG&gt;AFD:&lt;SPAN&gt;&amp;nbsp;&lt;/SPAN&gt;&lt;/STRONG&gt;&lt;SPAN&gt;Arc-Form Drive original EOS AF motor. No longer in use was replaced by Micro Motor in 1993 for new lens designs. No Full Time Manual Focus.&amp;nbsp;&lt;/SPAN&gt;&lt;U&gt;&lt;STRONG&gt;ONLY used in the EF Mount NO EF-S, EF-M or RF Mount lenses.&lt;/STRONG&gt;&lt;/U&gt;&lt;SPAN&gt;&amp;nbsp;(Retired 1987-1992)&lt;/SPAN&gt;&lt;/LI&gt;
&lt;LI&gt;&lt;STRONG&gt;Micro Motor:&lt;SPAN&gt;&amp;nbsp;&lt;/SPAN&gt;&lt;/STRONG&gt;&lt;SPAN&gt;Older least advanced AF motor slower AF used in cheaper lenses. No Full Time Manual Focus.&amp;nbsp;&lt;/SPAN&gt;&lt;U&gt;&lt;STRONG&gt;ONLY used in the EF/ EF-S Mount.&lt;/STRONG&gt;&lt;/U&gt;&lt;SPAN&gt;&amp;nbsp;(Retired, 1993-2012) Replaced by STM in 2012.&lt;/SPAN&gt;&lt;/LI&gt;
&lt;LI&gt;&lt;STRONG&gt;VCM:&lt;/STRONG&gt;&amp;nbsp;Voice Coil Motor provides fast AF. The&amp;nbsp;&lt;U&gt;&lt;STRONG&gt;RF 35mm F/1.4&lt;FONT color="#FF0000"&gt;L&lt;/FONT&gt;&lt;SPAN&gt;&amp;nbsp;&lt;/SPAN&gt;VCM&lt;/STRONG&gt;&lt;/U&gt;&lt;SPAN&gt;&amp;nbsp;&lt;/SPAN&gt;is the first lens to use this new AF motor.&lt;/LI&gt;
&lt;LI&gt;&lt;STRONG&gt;IS:&lt;SPAN&gt;&amp;nbsp;&lt;/SPAN&gt;&lt;/STRONG&gt;&lt;SPAN&gt;Image Stabilization available in the lens.&lt;/SPAN&gt;&lt;/LI&gt;
&lt;LI&gt;&lt;STRONG&gt;IBIS:&lt;SPAN&gt;&amp;nbsp;&lt;/SPAN&gt;&lt;/STRONG&gt;&lt;SPAN&gt;In Body Image Stabilization available in select EOS R Series cameras.&lt;/SPAN&gt;&lt;/LI&gt;
&lt;LI&gt;&lt;STRONG&gt;Macro:&lt;SPAN&gt;&amp;nbsp;&lt;/SPAN&gt;&lt;/STRONG&gt;&lt;SPAN&gt;A macro lens with 1:1 magnification&lt;/SPAN&gt;&lt;/LI&gt;
&lt;LI&gt;&lt;STRONG&gt;Compact Macro:&lt;SPAN&gt;&amp;nbsp;&lt;/SPAN&gt;&lt;/STRONG&gt;&lt;SPAN&gt;Lens is able to focus closer than a normal macro lens.&lt;/SPAN&gt;&lt;/LI&gt;
&lt;LI&gt;&lt;STRONG&gt;MP-E:&lt;SPAN&gt;&amp;nbsp;&lt;/SPAN&gt;&lt;/STRONG&gt;&lt;SPAN&gt;Manual Focus only electronic aperture control no focus to infinity.&lt;/SPAN&gt;&lt;/LI&gt;
&lt;LI&gt;&lt;STRONG&gt;TS-E:&lt;SPAN&gt;&amp;nbsp;&lt;/SPAN&gt;&lt;/STRONG&gt;&lt;SPAN&gt;Tilt Shift lens with electronic aperture control no Autofocus.&amp;nbsp;&lt;/SPAN&gt;&lt;/LI&gt;
&lt;LI&gt;&lt;STRONG&gt;Soft Focus:&lt;SPAN&gt;&amp;nbsp;&lt;/SPAN&gt;&lt;/STRONG&gt;&lt;SPAN&gt;Lens is designed to provide a creamy bokeh effect.&lt;/SPAN&gt;&lt;/LI&gt;
&lt;LI&gt;&lt;STRONG&gt;PZ:&lt;SPAN&gt;&amp;nbsp;&lt;/SPAN&gt;&lt;/STRONG&gt;&lt;SPAN&gt;Power Zoom lens. Only 1 lens released with this feature. Only the&amp;nbsp;&lt;/SPAN&gt;&lt;U&gt;&lt;STRONG&gt;EF 35-80mm F/4-5.6 PZ&lt;/STRONG&gt;&lt;/U&gt;&lt;SPAN&gt;&amp;nbsp;&lt;/SPAN&gt;&lt;SPAN&gt;lens used this.&amp;nbsp;&lt;/SPAN&gt;&lt;/LI&gt;
&lt;LI&gt;&lt;STRONG&gt;TTL:&lt;SPAN&gt;&amp;nbsp;&lt;/SPAN&gt;&lt;/STRONG&gt;&lt;SPAN&gt;Through The Lens Flash metering. Flash system relies on light reflected off the film.&amp;nbsp;&lt;/SPAN&gt;&lt;U&gt;&lt;STRONG&gt;NOT compatible with EOS Digital cameras.&lt;/STRONG&gt;&lt;/U&gt;&lt;/LI&gt;
&lt;LI&gt;&lt;STRONG&gt;A-TTL:&lt;SPAN&gt;&amp;nbsp;&lt;/SPAN&gt;&lt;/STRONG&gt;&lt;SPAN&gt;Advanced Through The Lens Flash metering system in EOS film bodies released in 1986 with the FD Mount T90 SLR. Replaced by&amp;nbsp;&lt;/SPAN&gt;&lt;U&gt;&lt;STRONG&gt;E-TTL&lt;SPAN&gt;&amp;nbsp;&lt;/SPAN&gt;&lt;/STRONG&gt;&lt;/U&gt;&lt;SPAN&gt;in 1995. System uses a pre-flash measured by a sensor on the speedlite itself.&lt;/SPAN&gt;&lt;SPAN&gt;&amp;nbsp;&lt;/SPAN&gt;&lt;U&gt;&lt;STRONG&gt;NOT compatible&lt;/STRONG&gt;&lt;/U&gt;&lt;SPAN&gt;&amp;nbsp;with EOS Digital cameras. Uses EZ series speedlites.&lt;/SPAN&gt;&lt;/LI&gt;
&lt;LI&gt;&lt;STRONG&gt;E-TTL Version 1:&lt;SPAN&gt;&amp;nbsp;&lt;/SPAN&gt;&lt;/STRONG&gt;&lt;SPAN&gt;Evaluative Through The lens Flash metering system. System uses a pre-flash measured by the camera body to calculate flash exposure. System also relies on AF point selection too. Compatible with EX or EL series speedlites. Replaced by E-TTL II in 2004.&lt;/SPAN&gt;&lt;/LI&gt;
&lt;LI&gt;&lt;STRONG&gt;E-TTL II:&lt;SPAN&gt;&amp;nbsp;&lt;/SPAN&gt;&lt;/STRONG&gt;&lt;SPAN&gt;Refer to E-TTL Version 1. System was released in 2004 and works similarly to the original E-TTL. But uses focus distance information from the lens. Via a distance encoder in the lens. E-TTL II doesn't rely on AF point selection.&amp;nbsp;&lt;/SPAN&gt;&lt;U&gt;&lt;STRONG&gt;Note E-TTL II is IMPLEMENTED in the camera body NOT the speedlite.&lt;/STRONG&gt;&lt;/U&gt;&lt;/LI&gt;
&lt;LI&gt;&lt;STRONG&gt;EOS M Series&lt;/STRONG&gt;&lt;SPAN&gt;: A&amp;nbsp;&lt;/SPAN&gt;&lt;U&gt;&lt;STRONG&gt;discontinued&lt;/STRONG&gt;&lt;/U&gt;&lt;SPAN&gt;&amp;nbsp;APS-C mirrorless lineup of cameras (2012-2023). Replaced by EOS R Series APS-C cameras in 2023.&amp;nbsp;&lt;/SPAN&gt;&lt;U&gt;&lt;STRONG&gt;EF-M lenses&lt;/STRONG&gt;&lt;SPAN&gt;&amp;nbsp;&lt;/SPAN&gt;&lt;STRONG&gt;CAN NOT BE ADAPTED to EOS DSLRs or EOS R cameras.&lt;/STRONG&gt;&lt;/U&gt;&lt;/LI&gt;
&lt;LI&gt;&lt;STRONG&gt;EOS R Series:&lt;SPAN&gt;&amp;nbsp;&lt;/SPAN&gt;&lt;/STRONG&gt;&lt;SPAN&gt;Originally released in 2018 with Full Frame cameras only. Later in 2023 with APS-C cameras. New APS-C lenses were released.&amp;nbsp;&lt;/SPAN&gt;&lt;/LI&gt;
&lt;LI&gt;&lt;STRONG&gt;Z:&lt;SPAN&gt;&amp;nbsp;&lt;/SPAN&gt;&lt;/STRONG&gt;&lt;SPAN&gt;Lens has an optional attachment to allow power zoom.&amp;nbsp;&lt;/SPAN&gt;&lt;U&gt;&lt;STRONG&gt;RF 24-105mm F/2.8&lt;/STRONG&gt;&lt;FONT color="#FF0000"&gt;&lt;STRONG&gt;L&lt;/STRONG&gt;&lt;/FONT&gt;&lt;STRONG&gt;&lt;SPAN&gt;&amp;nbsp;&lt;/SPAN&gt;IS USM Z&lt;/STRONG&gt;&lt;/U&gt;&amp;nbsp;(first&amp;nbsp;&lt;SPAN&gt;lens has this feature).&lt;/SPAN&gt;&lt;/LI&gt;
&lt;LI&gt;&lt;STRONG&gt;Automatic Brightness Adjustment of LED AF Assist Beam:&lt;SPAN&gt;&amp;nbsp;&lt;/SPAN&gt;&lt;/STRONG&gt;&lt;SPAN&gt;Feature&amp;nbsp;&lt;/SPAN&gt;&lt;U&gt;&lt;STRONG&gt;IS NOT&lt;/STRONG&gt;&lt;SPAN&gt;&amp;nbsp;&lt;/SPAN&gt;&lt;STRONG&gt;SUPPORTED&lt;/STRONG&gt;&lt;/U&gt;&lt;SPAN&gt;&amp;nbsp;on the R3, R7 &amp;amp; R10 camera bodies when the&lt;/SPAN&gt;&lt;STRONG&gt;&lt;U&gt;&lt;SPAN&gt;&amp;nbsp;&lt;/SPAN&gt;speedlite EL-5 is used. LED AF Assist Beam is projected at FULL BRIGHTNESS ONLY. Or will switch to Intermittent Flash Firing&lt;/U&gt;.&lt;SPAN&gt;&amp;nbsp;&lt;/SPAN&gt;&lt;/STRONG&gt;&lt;SPAN&gt;All other cameras with a Multi-Function hot shoe will automatically adjust the LED AF Assist Beam depending on the ambient brightness.&lt;/SPAN&gt;&lt;/LI&gt;
&lt;/UL&gt;
&lt;UL&gt;
&lt;LI&gt;&lt;STRONG&gt;AF Assist Beam:&lt;SPAN&gt;&amp;nbsp;&lt;/SPAN&gt;&lt;/STRONG&gt;&lt;SPAN&gt;An AF Assist Lamp to aid the camera’s AF system in low light or low contrast situations.&lt;/SPAN&gt;&lt;/LI&gt;
&lt;/UL&gt;
&lt;UL&gt;
&lt;LI&gt;&lt;STRONG&gt;IR AF Assist Beam:&lt;SPAN&gt;&amp;nbsp;&lt;/SPAN&gt;&lt;/STRONG&gt;&lt;SPAN&gt;A red grid pattern projected by the speedlite to aid an SLR/ DSLR camera’s AF system. Note this red grid pattern&amp;nbsp;&lt;/SPAN&gt;&lt;U&gt;&lt;STRONG&gt;IS NOT&lt;/STRONG&gt;&lt;/U&gt;&lt;SPAN&gt;&amp;nbsp;Infrared. This AF Assist Beam type is compatible on all EOS SLRs &amp;amp; DSLRs. This type of AF Assist Beam&amp;nbsp;&lt;/SPAN&gt;&lt;U&gt;&lt;STRONG&gt;IS INCOMPATIBLE&lt;/STRONG&gt;&lt;/U&gt;&lt;SPAN&gt;&amp;nbsp;with mirrorless cameras.&lt;/SPAN&gt;&lt;/LI&gt;
&lt;/UL&gt;
&lt;UL&gt;
&lt;LI&gt;&lt;STRONG&gt;Intermittent Flash Firing AF Assist Beam:&lt;SPAN&gt;&amp;nbsp;&lt;/SPAN&gt;&lt;/STRONG&gt;&lt;SPAN&gt;Camera rapidly pulses the speedlite for AF Assist. This AF Assist Beam type&amp;nbsp;&lt;/SPAN&gt;&lt;U&gt;&lt;STRONG&gt;IS SUPPORTED ON ALL EX &amp;amp; EL&lt;/STRONG&gt;&lt;SPAN&gt;&amp;nbsp;&lt;/SPAN&gt;&lt;STRONG&gt;speedlites when used on the EOS R Series&lt;/STRONG&gt;&lt;/U&gt;&lt;SPAN&gt;&lt;U&gt;.&lt;/U&gt;&amp;nbsp;Note speedlites that have a&amp;nbsp;&lt;/SPAN&gt;&lt;U&gt;&lt;STRONG&gt;PERSONAL FUNCTION&lt;SPAN&gt;&amp;nbsp;&lt;/SPAN&gt;&lt;/STRONG&gt;&lt;/U&gt;&lt;SPAN&gt;for IR &amp;amp; Intermittent Flash Firing. Always use Intermittent Flash Firing on the EOS R series regardless of the projection method. When set to Intermittent Flash Firing. If a color filter or flash diffuser is used. The camera body emits an LED AF Assist Beam on the EOS R series. Intermittent Flash Firing is&amp;nbsp;&lt;/SPAN&gt;&lt;U&gt;&lt;STRONG&gt;DISABLED&lt;/STRONG&gt;&lt;/U&gt;&lt;SPAN&gt;&amp;nbsp;&lt;/SPAN&gt;&lt;SPAN&gt;when a color filter or flash diffuser is used. Speedlites without a&amp;nbsp;&lt;/SPAN&gt;&lt;U&gt;&lt;STRONG&gt;PERSONAL FUNCTION&lt;/STRONG&gt;&lt;/U&gt;&lt;SPAN&gt;&amp;nbsp;between IR and Intermittent Flash Firing. The speedlite&amp;nbsp;&lt;/SPAN&gt;&lt;U&gt;&lt;STRONG&gt;WILL&lt;/STRONG&gt;&lt;/U&gt;&lt;SPAN&gt;&amp;nbsp;use Intermittent Flash Firing on the EOS R series.&amp;nbsp;&lt;/SPAN&gt;&lt;U&gt;&lt;STRONG&gt;Note depending on the ambient lighting an AF Assist Beam may be projected by the camera body instead of the speedlite on the EOS R series.&lt;/STRONG&gt;&lt;/U&gt;&lt;SPAN&gt;&amp;nbsp;This AF Assist Beam type&amp;nbsp;&lt;/SPAN&gt;&lt;STRONG&gt;ONLY&lt;/STRONG&gt;&lt;SPAN&gt;&amp;nbsp;works on cameras released from 2007-onward.&amp;nbsp;&lt;/SPAN&gt;&lt;/LI&gt;
&lt;LI&gt;&lt;STRONG&gt;LED AF Assist Beam:&lt;SPAN&gt;&amp;nbsp;&lt;/SPAN&gt;&lt;/STRONG&gt;&lt;SPAN&gt;Bright white light (on a speedlite) or orange LED light (on an EOS R series camera body) that aids the camera for AF Assist. This AF Assist Beam type&amp;nbsp;&lt;/SPAN&gt;&lt;U&gt;&lt;STRONG&gt;ONLY&lt;/STRONG&gt;&lt;/U&gt;&lt;SPAN&gt;&amp;nbsp;works on cameras released from 2007-onward.&amp;nbsp;&lt;/SPAN&gt;&lt;/LI&gt;
&lt;/UL&gt;</description>
      <pubDate>Sat, 14 Sep 2024 17:15:18 GMT</pubDate>
      <guid>https://community.usa.canon.com/t5/EF-RF-Lenses/Lens-compatibility-with-my-SLR-35mm-film-camera/m-p/500469#M33365</guid>
      <dc:creator>deebatman316</dc:creator>
      <dc:date>2024-09-14T17:15:18Z</dc:date>
    </item>
    <item>
      <title>Re: Lens compatibility with my SLR 35mm film camera</title>
      <link>https://community.usa.canon.com/t5/EF-RF-Lenses/Lens-compatibility-with-my-SLR-35mm-film-camera/m-p/500470#M33366</link>
      <description>&lt;P&gt;What I meant to say wouldn't be as wide as it would be on a Full Frame or 35mm Film camera.&lt;/P&gt;</description>
      <pubDate>Sat, 14 Sep 2024 17:17:39 GMT</pubDate>
      <guid>https://community.usa.canon.com/t5/EF-RF-Lenses/Lens-compatibility-with-my-SLR-35mm-film-camera/m-p/500470#M33366</guid>
      <dc:creator>deebatman316</dc:creator>
      <dc:date>2024-09-14T17:17:39Z</dc:date>
    </item>
    <item>
      <title>Re: Lens compatibility with my SLR 35mm film camera</title>
      <link>https://community.usa.canon.com/t5/EF-RF-Lenses/Lens-compatibility-with-my-SLR-35mm-film-camera/m-p/500488#M33370</link>
      <description>&lt;P&gt;&lt;EM&gt;"What I meant to say wouldn't be as wide as it would be on a Full Frame or 35mm Film camera."&lt;/EM&gt;&lt;/P&gt;
&lt;P&gt;Well then that's what you should have said. Since the OP said, &lt;EM&gt;"I'm a very amateur photographer&amp;nbsp;..."&amp;nbsp;&lt;/EM&gt;Saying it would not be a WA on his camera is misleading and wrong..&lt;/P&gt;</description>
      <pubDate>Sat, 14 Sep 2024 19:21:23 GMT</pubDate>
      <guid>https://community.usa.canon.com/t5/EF-RF-Lenses/Lens-compatibility-with-my-SLR-35mm-film-camera/m-p/500488#M33370</guid>
      <dc:creator>ebiggs1</dc:creator>
      <dc:date>2024-09-14T19:21:23Z</dc:date>
    </item>
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