EF & RF Lenses
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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
  • 11842 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, ...

Mounted RF100-500mm lens is not stable

I have an RF 100-500 lens that I use with an R5 mk2 (previously with a first gen R5). A couple of weeks ago I noticed that when I am holding the camera the lens actually moves after being mounted. I tried the lens on a different camera and it's loose...

Resolved! Play in Canon RF 100-500 Tripod collar

I’ve had a significant problem with slippage of the newly designed tripod collar. Specifically the RF 100-500 lens. (But also RF 70-200 2.8) i took the 100-500 into Canon repair. They had to replace the collar but when I picked it up I was told expec...

Manual Focus with non-L RF lenses on R7??

I have been shooting on canon since I was quite literally 14 years old. It’s the only brand I’ve ever known and used. Some things I love, some things I absolutely despise.The removal of the MF/AF switch on the smaller non-L RF lenses for the control ...

denzil by Apprentice
  • 987 Views
  • 2 replies
  • 0 likes

Canon RF100-500mm MF stopped working

Hi, MF isn’t working on my RF100-500mm (on an R8. As I twist the focus ring the scale doesn’t move on the LCD. Don’t think I’ve altered any settings. Be grateful for any suggestions, thanks.

EF-S APS-C lens on Full Frame ?

Hi, I have found myself in a bit of a predicament, I’m in an upgrade process, from Canon 2000D. I had my mind made up on the Canon R7, which will be a great transition with all my current lenses, by just adding the EF to RF Adapter. But now I found a...

j1udith by Apprentice
  • 1132 Views
  • 3 replies
  • 0 likes

RF 28-70 F2 Coating Issue

Has anyone else experienced the coating peeling off on the 28-70 f2, this lens is very expensive and I have had the lens less than a year and canon repair is telling me it is not under warranty. I have heard numerous people talk about having the same...

RF-S18-150mm AF/MF switch stopped working

Hello everyone, I have an r7, and with the rf-s 18-150mm f3.5-6.3 STM, I have been using the af/mf switch on the front of the camera body to switch between focus modes quickly, since the lens has no such switch.  Suddenly this switch on the camera bo...

Resolved! Some weird blurriness for EOS R6 Mark II with RF24-105 f/4

I bought my new canon R6Mark2 with RF24-105 f/4 from Japan recently and shoot my first set of photos. However, the blurriness of the out-of-focus area appears to be very weird. Here are some examples:       I know some of the subjects are out-of-f...

Screenshot 2025-10-25 at 5.12.51 PM.jpg Screenshot 2025-10-25 at 5.16.38 PM.jpg Screenshot 2025-10-25 at 5.11.44 PM.jpg

Resolved! Is this a Newton Ring in my EF-M 14-45mm

This concentric ring appears at every focal length in the same spot, in the top left corner, at aperatures 6.0 and smaller, magnified with more zoom toward 45mm.  With or without hood or filter or angle of the sun.  I bought the lens used...is this a...

test 01 45mm.jpeg surfer newton ring.jpeg

Determining a Nodal Point (no Parallax Point)

Depending upon the content captured in panoramas, it will be crucial to determine the nodal point (aka no parallax point) of your lens and camera combination. This allows for easy compositing since objects in the scene will correctly line up. What fo...

leveling_base.jpg c_stand.jpg lines.jpg nodal_slide.jpg
rs-eos by Elite
  • 3633 Views
  • 5 replies
  • 18 likes
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