Canon EF and RF Lenses Forum

Resolved! Effects of using EF in EF-S camera and lens crop factor calculations.

I have read a lot about APS-C sensors and the differences between EF and EF-S lenses. I still have two remaining questions regarding how EF-S lenses are marketed. 1) Do EF-S lenses need to have the 1.6x factor applied for effective focal length or ar...

EF 1.4X and 2.0X Extenders

Where I find a list of non-Canon lenses that are compatible with a Canon EF 1.4X & 2.0 Extenders?

need to buy an used but in excellent condition lens 20-70 mm. Any ideas?

need to buy an used but in excellent condition lens 20-70 mm. Any ideas? I photograph boxing.

need repair of 17-35mm F 2.8 does not show up in repair support.

Lens has focus problem, does not go above 3m

Canon 10D lens to Rebel T5?

I have a very well used, extremely loved Canon 10d. I would like to get a Rebel T5. Can I use my 10d lenses on the T5?

EF-S 18-55 IS STM lens makes clicking noise when zooming

I just purchased an EOS Rebel SL1 bundled with an EF-S 18-55 IS STM lens. After taking a couple dozen pictures, I noticed the lens makes a faint click noise when zooming from 35 to 55, like a spring is tripping. It does this every time. It does no...

Resolved! Canon EF 70-200mm f/4 L USM not as sharp as myCanon EF 100-400mm f/4.5-5.6L IS

Hi can't seem to get a sharp a image with my 70- 200 as I can with my 100-400mm. Should I be getting just as sharp photos with both lenses. I still have a warranty with best buy.

Problem with my EF24-105mm f4 lens on 40D

For some reason my recently acquired lens will not focus sharply on my 40D, yet it focuses properly on my 7D. All my other lenses (EF70-200 f2.8, EF-S17-55 f2.8, EF28-70mm) also work properly on my 40D. Any ideas what my problem might be?Thank for yo...

looking for wide angle used lenses

can anyone send me to a website or service that has decent deals?

70-200mm Focus Issue

Well I just discovered something interesting by accident. I just tested the focus on my 70-200mm f2.8 lens on my new 7DMKII. I found if I turned the manual focus ring CW before calling for the camera to autofocus it was spot on. However, if I turned ...

Better Lens??

Which is a better overall lens the Canon EF 70-300mm f/4-5.6 IS USM Lens or the Canon EF 70-200mm f/4L USM Lens?

Canon EF 16-35mm f/4L on a Canon T1i

I'm considering getting a Canon EF 16-35mm f/4L but I don't have a full frame camera, although I intend on getting one in the future. I was wondering if getting this lens now makes sense considering I currently have a T1i right now. As of now I don't...

AE-1 lenses and newer EOS and EOS Rebel units

Will the lenses from my older Canon AE-1 fit onto the bodies of the newer digital EOS and Rebel Canon units ?? Thanx for the guidance !!

What's the best Telephoto Zoom lens for canon rebel T3??

Hi, i have a canon rebel t3 and i want a telephoto lens , but i don't know which lens to take between Canon EF 75-300mm f/4-5.6 III USM and Canon EF-S IS 55-250mm f/4-5.6 IS II, I generally like to shoot street, abstract and nature photos and I'm not...

Resolved! Canon EF 28-90mm f/4-5.6 lll lens

I am thinking about buying a Canon EF 28-90mm f/4-5.6 lll lens. How compatible is it to the EOS Rebel T3i? Thank you for your time.

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Posts

Resolved! Effects of using EF in EF-S camera and lens crop factor calculations.

EF 1.4X and 2.0X Extenders

need to buy an used but in excellent condition lens 20-70 mm. Any ideas?

need repair of 17-35mm F 2.8 does not show up in repair support.

Canon 10D lens to Rebel T5?

EF-S 18-55 IS STM lens makes clicking noise when zooming

Resolved! Canon EF 70-200mm f/4 L USM not as sharp as myCanon EF 100-400mm f/4.5-5.6L IS

Problem with my EF24-105mm f4 lens on 40D

looking for wide angle used lenses

70-200mm Focus Issue

Better Lens??

Canon EF 16-35mm f/4L on a Canon T1i

AE-1 lenses and newer EOS and EOS Rebel units

What's the best Telephoto Zoom lens for canon rebel T3??

Resolved! Canon EF 28-90mm f/4-5.6 lll lens

Real life IQ with the RF 14-35 F4L

Additions to the NEW RF STM lens lineup

Big Savings - Canon RF 100-500mm f/4.5-7.1 L IS US...

EOS M50 -doesn't take pictures with EF-M 15-45mm l...

RF 100-500mm F4.5-7.1 L IS USM, Auto Focus focuses...

Why can't I mount the FL 58mm f/1.2 lens on a Cano...

RF 100mm f2.8 macro lens serious focusing issues

Lens elements rattle/shake on RF 70-200mm F2.8 L I...

Sticker and blacked-out bar code on the box of a n...