Canon EF and RF Lenses Forum

Resolved! RF 100-500mm Manual Focusing with AF Engaged

When using the RF 100-500mm lens (attached to a R5), and the lens switch is in the AF position, can you also use the manual focusing ring to override the auto-focusing? The focusing ring does have any effect when the lens is switched to AF. When us...

300 mm 2.8 usm Optical Difference Between Lens from 1999 and Today

Hi everyone, I own an old 300 mm 2.8 usm first generation, 1999 I guess.I like to know if any big optical difference with the IS newer generation?

Resolved! Remote shooting focus failure with EF 100mm f2.8 Macro USM lens

I take photographs of objects by shooting with a Canon 6D through a newer pc laptop via Canon Utilities version 3. This setup worked fine until recently. Now when I use the Canon EF 100mm f2.8 Macro USM lens, I get the message “focus failure” and the...

Resolved! Need a suggestion for a macro lens to photograph my jewelry

Hey there! I make jewelry and am looking for a true macro lens for my Canon T6. I've read so many different blogs, posts and I'm more confused than ever. I don't have thousands to spend and a new camera isn't an option at the moment. I've been gettin...

Parameters of the UltraSonic Motor of lens

Hi everyone, I'm a researcher from the university. In my study, we ued two SLR lens with Ultrasonic Motor for imaging (f=50/1.4 and f=100/2.8).Recently one reviewer of our paper ask us to compare our new technique with the focusing speed of the USM...

Does RF 100-500 shut down IS when it's mounted on a tripod?

Hi everybody!I switched recently from Canon EF 70-300 IS USM II to RF 100-500 L and noticed that when mounted on a tripod my 100-500 unit (looks like) shuts down IS. Just want to know... is it something wrong with my unit or is it just a normal behav...

Resolved! EF Lens Compatibility with EOS Rebel T6i

I have Rebel T6i and I want to buy Canon EF 70-200mm f/2.8L IS III USM Lens... Can I used it on my camera?

Resolved! 1.4x iii release pin not always engaging

My 1.4x iii release/anti-rotation pin doesn't aways engage and I have to move the lever back and forth a few times on occasion. Not wanting my attached lens/body to fall off, I aways try to check. I would like to send this in for service, but it loo...

Canon 50mm 1.8 II EF Lens Dust Caps

Can someone point me to the correct dust caps for this model lens? Unable to find on the Canon site.

Resolved! Having trouble registering RF100-500mm F4.5-7.1 L IS USM

I cannot register my RF100-500mm F4.5-7.1 L IS USM as it doesn't come up as I type it in.

Resolved! Canon 500mm F4 L ii overexposing at narrower aperature settings

Lens: Canon 500mm L iiProblem statement:I notice that if I shoot at f8 or higher fstop that the resultant picture is more and more overexposed by about one fstop for every fstop raised. I think that the aperture is not closing to narrower than about ...

Resolved! How to register Canon EF-S 18-55mm f/3.5-5.6 IS II lens

Hello forum,I recently purchased this lens and tried to register is on Canon website.They don't have it in the list of available products.How can I register my purchase?Thank you!

New EF-M Macro lens

There is a just announced Macro for EF-M with several cool features:Builti in LED lightsMagnification to 1.2X life size .31 ft focus distance which I am guessing is about 2" in front of the lens.

Resolved! EOS REBEL T7 Telephoto Lenses

I have a Canon rebel eos t7. Is there another telephoto lens that i can use past 300?

28mm 1.8 lens will not focus and makes clicking sounds.

When in MF and I turn the focus ring, it turns forever but makes no adjustment. When in AF, and half press the shutter, it clicks but makes no adjustment. Is it trash? I'm so sad, I love this lens. Nothing happened... It was working yesterday. T...

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Posts

Resolved! RF 100-500mm Manual Focusing with AF Engaged

300 mm 2.8 usm Optical Difference Between Lens from 1999 and Today

Resolved! Remote shooting focus failure with EF 100mm f2.8 Macro USM lens

Resolved! Need a suggestion for a macro lens to photograph my jewelry

Parameters of the UltraSonic Motor of lens

Does RF 100-500 shut down IS when it's mounted on a tripod?

Resolved! EF Lens Compatibility with EOS Rebel T6i

Resolved! 1.4x iii release pin not always engaging

Canon 50mm 1.8 II EF Lens Dust Caps

Resolved! Having trouble registering RF100-500mm F4.5-7.1 L IS USM

Resolved! Canon 500mm F4 L ii overexposing at narrower aperature settings

Resolved! How to register Canon EF-S 18-55mm f/3.5-5.6 IS II lens

New EF-M Macro lens

Resolved! EOS REBEL T7 Telephoto Lenses

28mm 1.8 lens will not focus and makes clicking sounds.

Thanks to Tom Ramsey's last post, I ordered an RF ...

Focal lengths and lenses used by great directors

RF Lens Coating Failures?

Lens Rentals on Canon's RF midrange zooms

Canon RF-S3.9mm F3.5 STM DUAL FISHEYE Lens

Colored fringe problem with RF 24-240 lens

What lens should I buy? RF lens recommendations fo...

Best lens for the rebel sl3? - Landscapes, pets, a...

New Assortment of Lenses! Which should I use?

EOS 5D Mark III lens recommendations for gig photo...