topic Re: Trouble programming EF 100-500mm lens ring via EOS R5 Mark II in EF & RF Lenses

Trouble programming EF 100-500mm lens ring via EOS R5 Mark II

ptornetta — Fri, 21 Mar 2025 18:39:20 GMT

hi. i just moved up to the R5 m2 and the ed 100-500 lens. i am trying to program the lens function to be “one shot ~ servo” and when i make the change on the camera then go out and back into the menu the lens ring is assigned correctly. however when i turn the ring it adjusts the exposure which i believe is default. i have tried setting the shutter as servo AI and also servo. o am shooting in Av with iso on auto with limits. any reason this should not work? are there limits as to what can be assigned to the lens?

any further information needed? new to mirrorless. thank you!

Re: Trouble programming EF 100-500mm lens ring via EOS R5 Mark II

March411 — Fri, 21 Mar 2025 19:01:12 GMT

Hey ptornetta, I'm confident someone here can assist but a quick question. You said that you are using the EF 100-500 but I believe you are meaning the new RF 100-500 as there is no EF version.

Also, if it is the RF 100-500mm are you attempting to program the control ring on the lens which would be done through the camera menu function?

Control Customization Details

Re: Trouble programming EF 100-500mm lens ring via EOS R5 Mark II

FloridaDrafter — Fri, 21 Mar 2025 20:09:22 GMT

Hello, ptornetta!

The functions you are trying to use are not available for the control ring. I've checked my R5 II and the current Advanced Users Guide. See page 1056 (attached) for available functions that can be bound to dials, including the control ring.

Be sure you are in the "Control Ring" function assignment menu 🙂

Newton

Re: Trouble programming EF 100-500mm lens ring via EOS R5 Mark II

p4pictures — Sat, 22 Mar 2025 13:37:00 GMT

When you say you have customised the lens function, is that the lens function button found in the Customise buttons section?

https://cam.start.canon/en/C017/manual/html/UG-08_Customize_0030.html#Customize_0030_1-1

There are only a few lenses with such L-Fn buttons, and the RF 100-500mm is not one of them.

As mentioned above the control ring which your lens does have, cannot be configured to toggle between one-shot and servo.

Re: Trouble programming EF 100-500mm lens ring via EOS R5 Mark II

ptornetta — Sat, 22 Mar 2025 15:09:03 GMT

thanks to all. 1 typo RF 100-500. also was using lens control not control ring. this is all very helpful thank you!