topic Re: Sigma 100-400 on R7 Autofocus issues? in EF & RF Lenses

Sigma 100-400 on R7 Autofocus issues?

atticus05 — Mon, 29 Jan 2024 13:55:47 GMT

I am planning to upgrade from my 77D to the R7 as the autofocus in particular looks fantastic for wildlife photography. I have often read that the R7 has problems with the Sigma 150-600mm autofocus (autofocus pulsing etc.). Do any of you have experience with the R7 in combination with the 100-400mm f/5-6.3 DG, OS, HSM lens? And if so, is the autofocus also affected with this lens?

Re: Sigma 100-400 on R7 Autofocus issues?

shadowsports — Mon, 29 Jan 2024 16:02:32 GMT

Greetings,

Welcome to the community. Much of the circumstances surrounding the reported and/or perceived AF issues with the Sigma 150 - 600c were related to improper use. User left IS turned on while using a tripod, User attempting to focus on a subject closer than the MFD for the lens at various focus lengths, etc.

I personally do not have any experience with the Sigma 100 400. If you were going to use this camera/lens combination, I suggest you use a Canon brand adapter. The 100-400 is part of Sigma's global vision category, be sure it's firmware is updated to the latest available. You'll need their dock to do this.

Third party lens compatibility is not guaranteed. With this in mind, adjust your expectations accordingly and understand that the lens is not going to perform the same way a Canon lens might. Focus tracking may not be as stellar, AF might not be as fast etc. This does not mean you won't be able to capture great photos.

I'm sure others will have additional comments.

Re: Sigma 100-400 on R7 Autofocus issues?

Tronhard — Mon, 29 Jan 2024 18:24:07 GMT

Totally agree with Rick's comments. Canon make no warranty about how 3rd party lenses will behave with their cameras so, to me, the best thing is to take the lens to a camera store, and try it on an R7 via a Canon adapter, and test it before you buy.