EF & RF Lenses
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Dust cap stuck

The rear dust cap is jammed on my Control Ring Mount Adapter EF-EOS R. I accidentally put on an EF mount dust cap without realising. I did not use force to do it, but it won’t come off. It will rotate a small amount each way. How do I remove it? I ne...

Canadian purchased lens

Are lenses purchased in Canada covered by the US warranty?  Can you buy CarePAK Plus for new lenses bought in Canada?

Resolved! RF 70-200mm Blurry/Shaky Images

Hey there!Random issue that cropped up recently. I've had my RF 70-200 for a couple of months now and have used it quite a bit, however it is still very very new to me. This is my first telephoto. I've noticed that when I take a photo at random the r...

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EF OR RF

I’m planning on buying the R6 and my mentor wants me to buy the Ef 24-70 mm. Which is better the Ef 24-70 mm or RF 24-70 mm?  Newbie here and I need all the advice I can get! 

EF 75-300mm Lens Attachment Problem

I have a EOS Rebel T3 along with the EFS 18-55mm lens and the EF 75-300 lens.  Recently the EF 75-300 lens has stopped attaching properly to the camera while the EFS 18-55mm lens still attaches fine.  I don't see any damage to the lens but thought I ...

Questions about MF

I guess I have three questions: 1) Is the lens IS tied to autofocus? 2) If I switch to MF, does the IS in my lens still work? 3) If you are using MF, does it make a difference turning off the IS when using a tripod? Steve Thomas

stevet1 by Authority
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The Curious Case of the EF 28-300L IS USM...

I have the venerable, and unique Canon EF 28-300L IS USM super-zoom lens.  It seems to be in perfect condition and has been so for some time since I bought it about 10 years ago.  Recently, when I began shooting with it using my FF cameras: EOS 5DMkI...

extension tubes - before or after lens adapter ?

I will be using an EF 100mm Macro lens on an R6.   I want to buy extension tubes for this combo.  Does it matter if I put RF tubes on the camera or EF tubes on the lens?  The EF tubes are a bit less expensive.

Tripod use with IS lenses

Hello forum!When using my RF 24-70 IS L lens, and my Canon R body, should I be turning off the IS feature on the lens when I'm using a tripod?? I'm planning some fireworks shots which will be relatively long exposures. 

Pozo by Contributor
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  • 4 replies
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RF 24-70 lens zoom ring is not smooth

Bought this lens from B&H in late May.  Now > 30 days since purchase.  Shot a bunch of video with it this week, zooming in and out of the subject action (sport).  It's not smooth.  What would you do about that?   I haven't called B&H yet.

wkf94025 by Contributor
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Resolved! What is this single white dot inside my lens?

HelloI recently purchased a used Canon Rebel T7i camera and apparently everything is OK with it, except the lens. On closer inspection I noticed that there is a white dot on the inside of the lens glass.I've seen a few threads here talking about prob...

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