EF & RF Lenses
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Resolved! Problem with two different Canon 85mm f/1.8 Lenses

A while back I was having intermittent problems just on a Canon 85mm f/1.8 USM lens. All my other lenses work fine. Sporadically I would get, "Communications between the camera and lens is faulty. Clean the contacts". It seemed humidity played a part...

IS on or off?

I was at a road course event this weekend. Was using a Canon 1DX with a Canon 400L 2.8, first generation. Thing is like a boat anchor so I was using my tripod and my Wimberley Gimbal head. I have a **bleep** near 50% fail to focus rate when I was usi...

Lens adapter Sigma to Canon

Hi all, I have a Canon T3i and recently bought lens Sigma 24-135mm f/2.8-4.5, but I just realized that it doesn't fit in my camera.I would like to know if I can easily find an adapter and which one could be. I found one in Amazon, but I'm not sure if...

jayne-lp by Apprentice
  • 17 replies

Resolved! Image Stabilization On/OFF when hiking ?

Hi all,When resting my DSLR attached with IS lens in the backpack / toploader for hiking, should I need to turn OFF lens IS or keep it ON ?Thank you for your response.

tmc784 by Enthusiast
  • 5 replies

Resolved! 650 Lens work for a T3i

Now i wish i still had all my old canon lens ??  Is there any thing special one needs to know when buying lens for a digital camera ???  I know canon film lens but my T3i is new to me ??

monradon by Contributor
  • 5 replies

Resolved! Lens not communicating with camera

My new 6D Mark 2 gives me an error message when I try to use my EF 100-400 1.4-5.6L IS II USM lens. "clean the lens contacts" The contacts are clean and the camera is new. The lens works fine on my EOS rebel, all other lenses work with my new camera....

Harry3 by Apprentice
  • 5 replies

Canon 17-40mm f4l Can't attach in camera

Hello! I have a Canon 7D and used the Canon Lens 17-40mm f4L every day. This lens never fell or was hit. There is no visible why the lens has stopped snapping into the camera. It's like there's something blocking the fit. I can use other lenses in 7D...

lelmota by Apprentice
  • 4 replies

Resolved! Noisy IS in L series 24-105. Normal?

I noticed recently really loud IS in my 24-105, loud enough in fact to be picked up by the on-camera microphone I used.  Is this normal, or should I seek out repair? 

San2C by Contributor
  • 4 replies

Does an encyclopedic list of Canon EF lenses exist?

Does anyone have a comprehensive list of Canon EF lenses manufactured, more specifically, those compatible with Canon film or digital SLR cameras? If I recall correctly, the Canon EOS 1V I purchased (2000?) used EF lenses, so I know they’ve been made...

Tripod collar 70-200mm F/4 IS II

Hi all, I need a tripod collar for my new 70-200mm F/4 IS II ... do you know if there is any 3rd party solution in the market? Canon's collar seems to be top quality but is quite expensive.  Thank you all in advanceGeorge

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