EF & RF Lenses
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Deciding between Canon EF 70-200mm F2.8L IS II & III

Looking for advice on best Canon lenses/value for sports photography.Used mostly for High School Sports photos & social media.Trying to decide between:Used Canon EF 70-200mm F2.8L IS II (roughly $1100)Used Canon EF 70-200mm F2.8L IS III (roughly $150...

troyza by Apprentice
  • 6571 Views
  • 5 replies
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Dropped my 24-105 mm lens

The lens was not mounted properly in my camera body. And while zooming out, the lens came out. The camera was in a tripod, the lens dropped from a height. It has only got some crack. However, the performance of lens is not affected. It shoots and foc...

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Marim0 by Apprentice
  • 664 Views
  • 3 replies
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EF 135 F2 L hunting around focus point

My 135mm L was starting to separate right behind the focus point, I opened it and replaced two screws that hold the Rear element in place, but now after reassembly it has a hard time confirming autofocus. It will lock onto the subject and then rack b...

Resolved! Adapting EF lenses to an EOS R6 Mark II

Are there any EF lenses that don’t have a 1.6x crop when you adapt them to an RF mount? For example, I want to purchase a 24-70 to be able to take astrophotography pictures but also be able to do a wide range of shots. I don’t have the budget for an ...

How to disassemble a EF 35-75 f3.5-4.5 ?

Hi,I'm trying to repair a Canon EF 35-75 1 : f3.5-4.5. It has a broken focus mechanism. I have looked on Youtube and cant find a video that shows a full disassembly. I have it partially disassembled it but I can figure out the steps to get the remain...

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Resolved! RF 100mm f/2.8L IS Macro lens on an R7 camera body

Hi, I understand the geometry associated with the use of a FF lens on an APS-C camera body and a previous thread thoroughly explores that subject. My question: what is the effect on photo quality, if any, using a FF lens with a small sensor?Thanks!

rickbb by Apprentice
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  • 8 replies
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EF 24-105mm f/4L Soft and Hazy

I have the above lens that is very soft and hazy - but i cannot see any dust or mold. I think i want to try to tear it down and see if i can do anything with it.  Like this guy is doing here: https://www.youtube.com/watch?v=bdShwMk-LDcBut he says tha...

wilmark by Contributor
  • 2155 Views
  • 19 replies
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Problem with Canon EF-S 55-250 IS STM

I bought the lens recently. But I was getting Err 01 ( connection between the camera and lens is faulty). Upon some investigation I found out that the aperture blades are not moving as supposed to. They function completely okay both in max zoomed in ...

kutty7 by Apprentice
  • 458 Views
  • 2 replies
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Resolved! RF 100-400mm lens image stabilization stopped working

My RF 100-400mm f5.6-8 IS USM has been working fine with my EOS R10, but today the IS function stopped working. The Stabilizer switch on the lens is in the ON position, but the waving hand symbol on the screen does not appear, and in the menu, the on...

nguyenhg by Apprentice
  • 1193 Views
  • 5 replies
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Blurry photos with Canon 70-200 2.8 EF

I am trying to use my 70-200 telephoto at continuous shooting and getting burry images. I even upped the ISO to allow for faster shutter speed to capture motion. Here are my settings and photo. iso640 100mm 2.8 3200 sp 

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MsKT74 by Contributor
  • 2010 Views
  • 21 replies
  • 0 likes
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