EF & RF Lenses
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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
  • 662 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 Authority
  • 1581 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
  • 2234 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
  • 1141 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
  • 1717 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
  • 1364 Views
  • 11 replies
  • 0 likes

Focus Issue RF 100-300 f/2.8 USM

I've had the captioned lens for about 14 months now and it has worked great until about 2 months ago when a focus issue started when the lens is zoomed all the way out to 300mm or 420mm with the 1.4 TC.I purchased the lens brand new from a camera sho...

rgl47 by Contributor
  • 933 Views
  • 8 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
  • 17224 Views
  • 25 replies
  • 0 likes

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
  • 11733 Views
  • 15 replies
  • 2 likes
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