topic Re: RF100-500 mounted to R5 focus issues in EF & RF Lenses

RF100-500 won't auto focus at 500mm

Sadie1 — Thu, 16 May 2024 13:19:38 GMT

Hoping someone can advise me on an issue I’m experiencing with the RF 100-500.
If at 100mm it focuses quite quickly. If at 500mm I lose shots due to I have to manually focus it. It doesn’t matter if shooting a BIF with a blue sky or if shooting bird houses.
I’ve noticed using the RF800 - it obtains focus much quicker.
Lenses mounted to the R5
Thank You

Re: RF100-500 mounted to R5 focus issues

Waddizzle — Sat, 03 Jul 2021 18:48:52 GMT

@Sadie1 wrote:
Hoping someone can advise me on an issue I’m experiencing with the RF 100-500.
If at 100mm it focuses quite quickly. If at 500mm I lose shots due to I have to manually focus it. It doesn’t matter if shooting a BIF with a blue sky or if shooting bird houses.
I’ve noticed using the RF800 - it obtains focus much quicker.
Lenses mounted to the R5
Thank You

How is the focus range switch on the lens set? Do not expect the lens to switch from focusing at one end of the zoom range to the other automatically. Under the right conditions, the lens can be so out-of-focus after zooming from one end of the range to the other, that the camera cannot understand what it sees. All that it sees in one big blur.

Re: RF100-500 mounted to R5 focus issues

Sadie1 — Sat, 03 Jul 2021 19:22:07 GMT

Hi - it is set on Full. I also checked the firmware updates on both camera and lens and they are up to date.

Re: RF100-500 mounted to R5 focus issues

Waddizzle — Sat, 03 Jul 2021 21:34:21 GMT

@Sadie1 wrote:
Hi - it is set on Full. I also checked the firmware updates on both camera and lens and they are up to date.

Judging from your video, you may get better AF performance on the other setting. You're focused across a room.

Have you changed any AF settings or shooting modes recently? Again, the really wide primes are designed for accurate focusing because of the very narrow Dof, not focusing speed.

Re: RF100-500 mounted to R5 focus issues

Sadie1 — Fri, 16 Jul 2021 12:10:46 GMT

I did not attach a video.

Re: RF100-500 mounted to R5 focus issues

jrhoffman75 — Fri, 16 Jul 2021 12:17:39 GMT

@Sadie1 wrote:
I did not attach a video.

Responder misspoke. It doesn't change the recommendation. Limiting the range for focusing will help by limiting the amount of searching the camera has to do.

Some lenses just seem to have more of a problem than others when they are severely out of focus.

Re: RF100-500 mounted to R5 focus issues

Sadie1 — Fri, 16 Jul 2021 12:36:09 GMT

Hi John - yes I’m aware of that. I have it on Full. About the only time it is not on Full is when I’m shooting BIF.
Since posting - I contacted Canon and they recommended sending the R5 in for repair. They are thinking it’s the camera - not the lens. If after repair the issue still exists - they recommend I send the lens in for repair. For the last week I’ve been using the 100-500 on the R6 and it’s been working fine.
Thank You

Re: RF100-500 mounted to R5 focus issues

jrhoffman75 — Fri, 16 Jul 2021 12:39:51 GMT

Hi Sadie - just a thought. To minimize your down time why not just send both to Canon at the same time.

Re: RF100-500 mounted to R5 focus issues

Sadie1 — Fri, 16 Jul 2021 13:06:16 GMT

Hi John - that was my original intent. The Canon rep talked me into just sending the R5. Which I accepted because I wanted to use the 100-500 on the R6 this past week on a boat tour.

Re: RF100-500 mounted to R5 focus issues

osya_bender — Thu, 21 Oct 2021 13:51:56 GMT

I'm curious to know is there was any resolution in this? Did canon find any issues with either camera or lens?

Re: RF100-500 mounted to R5 focus issues

Sadie1 — Thu, 21 Oct 2021 13:53:23 GMT

Hi - Canon found an issue with the R5 but no issues found with lens.

Re: RF100-500 mounted to R5 focus issues

osya_bender — Thu, 21 Oct 2021 13:58:33 GMT

Did it resolve the foccusing problems?

Re: RF100-500 mounted to R5 focus issues

Curoxima — Wed, 15 May 2024 18:16:00 GMT

I had the same problem with an EOS R5 mounted with RF 100-500.

Re: RF100-500 mounted to R5 focus issues

shadowsports — Wed, 15 May 2024 18:27:49 GMT

Greetings,

Since this topic is 3 yrs old and hasn't received any replies since 2021, may I ask that you please start a new topic if you'd like help with your R5 and RF 100-500. My experience has been quite different. This camera lens combo has been absolutely wonderful for me. We are happy to help and answer any questions, so please help by starting your own topic. Thanks in advance. 😀