EF & RF Lenses
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Resolved! Sticker and blacked-out bar code on the box of a new Canon lens

Greetings! I just purchased a new Canon RF 24-105mm F4 L IS USM on Amazon (sold by/shipped from Amazon), which arrived today.The box has no seals on it whatsoever. The white field on the top of the box has two stickers that cover the original bar cod...

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wenamun by Contributor
  • 1802 Views
  • 17 replies
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Resolved! RF 100mm f2.8 macro lens serious focusing issues

I recently purchased a RF 100mm f2.8 macro L series lens. I'm using it with a new R5 mk II. The lens moves out of focus with no input from me. When I try to focus on an object with sufficient light and contrast the lens doesn't move. Using the manual...

Resolved! Lens elements rattle/shake on RF 70-200mm F2.8 L IS USM

This is rattle / shake normal for RF 70-200mm F2.8 L IS USM?  I've never had a canon IS lens with this amount of rattle / shake.I Just moved from Canon DSLR to Mirrorless, my R5 Mark II body is still in the mail so I can't test it on body.I bought th...

Ricey by Apprentice
  • 1125 Views
  • 8 replies
  • 0 likes

Question about variable zoom lenses and aperture

As I understand it, with a variable zoom lens, as you zoom in, your available aperture gets smaller.. As you zoom in, the amount of light hitting your sensor is reduced. If your aperture gets smaller, that reduces the amount of light hitting your sen...

stevet1 by Elite
  • 2653 Views
  • 20 replies
  • 0 likes

Resolved! RF 28-70 F2 IS STM f-stop range question

All, Considering purchasing the above lens. Because there is not a range in F stops. The F2 is the F stop at 28mm as well as 70mm. Is that correct? Thank you in advance for your response. 

Cantrell by Rising Star
  • 2944 Views
  • 28 replies
  • 0 likes

Visible Vignetting with RF100-500 + R5

  Hi allNoticing vignetting when viewing in equalize mode in almost all my photos. I’ve been using the same settings for 15 years with my aviation photography and I never saw this with my old 100-400 paired with the 70Dany input would be appreciated ...

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roush6ny by Apprentice
  • 1744 Views
  • 12 replies
  • 0 likes

RF 200-800 does not focus when starting at 800 mm

I am Using RF 200-800 with my Canon R5 Mark 2 . I was having plenty of Issues with Using AF -  However Most are resolved reading through guides & community reading. However , One Thing is Still Bugging :   When I start shooting Shutter Priority , and...

Chandan_k by Contributor
  • 2648 Views
  • 22 replies
  • 0 likes

EF 50mm 1.8 on DSLRs: Accurate AF without fine-tuning?

Is accurate AF possible with this lens? I am on my second copy. Second more accurate than first, but still not brilliant. I can't fine-tune the AF on my 5D Mk I. Other lenses focus well on this body, but none of the Canon 50mm lenses I've tried - the...

damatka5 by Apprentice
  • 1812 Views
  • 11 replies
  • 0 likes

RF-S Lenses on Full Frame EOS R Bodies

Has anyone used one of the new RF-S lenses on an EOS R series full frame body?  I'm wondering how the IS and Focus/Control ring functions are controlled with no switches on the lenses. Doesn't seem clear in the full frame body manual since it's a new...

Bbarn by Contributor
  • 21386 Views
  • 25 replies
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Resolved! Canon RF 100-400 Autofocus problem

Hello,Does anybody have an issue with autofocusing in 400mm with this lens? When I extend the lens to 400mm and try to focus, the lens is not focusing. I have to retract the lens to 100mm and refocus. Only then autofocus works. It happens almost ever...

Len29 by Contributor
  • 13087 Views
  • 15 replies
  • 2 likes

Resolved! AE-1 lens compatibility with Rebel T7?

I apologize in advance for what may be a DUH question, but I honestly can't get a solid answer online to my question if my old AE-1 lenses will work with some sort of adapter with my Rebel T7. Will the Control Ring Mount Adapter EF-EOS R do the job, ...

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