topic Re: Auto focus C Fn II settings in EOS DSLR & Mirrorless Cameras

EOS 90D Advice for Auto focus C Fn II settings for wildlife, sports, and clouds

Ramsden — Fri, 12 Sep 2025 13:35:35 GMT

Hi folks

I'm nearly up to 2yrs ownership with my EOS 90D and stayed away from the C. Fn- 11 auto focus settings, mainly after reading a warning in my guide. See attached.

Now I feel ok to proceed with caution. I shoot some wildlife, sport and clouds for example. So help please: any advice, tips and warnings welcome.

Ramsden

Re: EOS 90D Advice for Auto focus C Fn II settings for wildlife, sports, and clouds

kijayiy164 — Fri, 12 Sep 2025 13:36:11 GMT

Canon's EOS 90D C.Fn-11 autofocus settings allow for fine-tuning the AF system's responsiveness. The "warning" in your guide likely refers to the fact that these custom functions can significantly alter AF behavior, and if set incorrectly, might lead to missed shots. For wildlife and sports, consider adjusting "Tracking sensitivity" to a more responsive setting (e.g., -1 or -2) to help the camera stick to fast-moving subjects. For subjects with more predictable motion, like birds in flight against a clear sky, a less responsive setting (e.g., +1 or +2) might be better to prevent the camera from accidentally focusing on the background. Always test these settings in different shooting scenarios to see what works best for your specific needs, and remember to reset them to default if your results are not improving.
Best regards,
Elsie

Re: Auto focus C Fn II settings

Ramsden — Fri, 12 Sep 2025 11:23:53 GMT

Thanks Elsie. Sounds like the sort of steady start that I need.

Ramsden

Re: EOS 90D Advice for Auto focus C Fn II settings for wildlife, sports, and clouds

Ramsden — Fri, 19 Sep 2025 16:21:04 GMT

Thanks Elsie,

I've been experimenting today with different settings. I need to be quite flexible and prepared for sudden changes. I live in a lovely, hilly part of Yorkshire and my walks can take in anything from rabbits, hares and badgers to a wide range of birds + I just photograph the rolling clouds.

So, my learning objective is to know how to quickly change my settings as my scenes come and go.

Not much to ask!

Ramsden

Re: EOS 90D Advice for Auto focus C Fn II settings for wildlife, sports, and clouds

p4pictures — Fri, 19 Sep 2025 23:22:49 GMT

Custom shooting modes can be one way to switch these settings quickly. You need to preprogram the custom modes with the settings you need and then simply remember that C1 is for birds, C2 is for hares etc. I find a little sticky tape inside the fold out LCD with a reminder of what you saved to each C mode is a useful thing.

Re: EOS 90D Advice for Auto focus C Fn II settings for wildlife, sports, and clouds

Ramsden — Sat, 20 Sep 2025 06:25:48 GMT

Thanks Brian

I haven't done too much with C1 anf C2 to date and its certainly a good solution. The sticky tape will really help my ageing memory and will certainly get used. My camera has such a lot to offer, and I'm determined to get the most out of it.

Thanks, again.

Ramden