topic Re: EOS R5 C autofocus not working in video mode on EF lenses in Professional Video

EOS R5 C autofocus not working in video mode on EF lenses

aanbari — Sun, 01 Sep 2024 17:43:43 GMT

Hello,

I just bought the R5c. I own a number of EF lenses. All my EF lenses autofocus fine on the Photo mode of the R5C but none of them autofocus in video mode.

This includes

- Canon 16-35 f2.8 III

- Canon 24-70 f4 II

- Canon 70-200 f2.8 III

- Sigma Contemporary 150-600

I have upgraded the firmware to the latest on camera.

Is there anything I can do? Please help.

thanks,

Ammar

Re: Canon R5 C autofocus not working in video mode on EF lenses

Stephen — Sun, 01 Sep 2024 13:45:01 GMT

Hello!

Which lens mount adapter are you using?

Re: Canon R5 C autofocus not working in video mode on EF lenses

aanbari — Sun, 01 Sep 2024 14:26:50 GMT

The canon Rf to EF pass through adapter

Re: Canon R5 C autofocus not working in video mode on EF lenses

Waddizzle — Sun, 01 Sep 2024 17:06:31 GMT

What AF points, video modes, and AF tracking modes are you using?

What are your subjects doing? Moving or still? How far away? How can I reproduce your issue?

Re: EOS R5 C autofocus not working in video mode on EF lenses

shadowsports — Sun, 01 Sep 2024 19:50:37 GMT

Greetings,

You need to have Continuous AF enabled in Cinema OS. Be sure to install FW version 1.0.7.1 or 1.0.8.1. This way you also get Large Focus Guide, Standard / Thick AF box, Gridlines on playback and support for reset AF point to center using Set or Joystick if progrmmed. Also*** you can map ISO or shutter speed to the quick control dial on the back... I use shutter angle and recommend that unless you have a specific reason not to 😉

See page 90 of the Video Users Guide

eosr5c-aug7-video-en.pdf

Re: EOS R5 C autofocus not working in video mode on EF lenses

stevet1 — Sun, 01 Sep 2024 19:21:40 GMT

I have a T8i and I've got something on my camera called Movie Servo. If I enable that, my camera continues to autofocus. It seems to be outside of the Continuous AF function I don't know if the R5C has that or not.

Steve Thomas

Re: EOS R5 C autofocus not working in video mode on EF lenses

shadowsports — Sun, 01 Sep 2024 19:59:24 GMT

Hi Steve,

Cinema OS doesn't have Movie Servo on the R5 C. It has Manual, OneShot and Continuous. AF behavior changes based on the mode, AF frame size and subject tracking method selected.

Re: EOS R5 C autofocus not working in video mode on EF lenses

aanbari — Sun, 01 Sep 2024 20:03:57 GMT

It worked. Thank you. Thank you thank you
It’s weird. Coming from using the 5D mk IV for years, I thought the AF is turned on from the lens switch.

thank you everyone!

Re: EOS R5 C autofocus not working in video mode on EF lenses

shadowsports — Sun, 01 Sep 2024 20:56:07 GMT

@aanbari wrote:

It worked. Thank you. Thank you thank you
It’s weird. Coming from using the 5D mk IV for years, I thought the AF is turned on from the lens switch.
thank you everyone!

Congrats on your purchase. The R5 C is really going to blow you away. Besides taking great photos, its got a video powerhouse with the flip of a switch. If you haven't watched any videos for it, check out Deaf Director (Bryan) and Josh Sattin. Both of these content creators have the best material on getting the most from your R5 C.

Re: EOS R5 C autofocus not working in video mode on EF lenses

stevet1 — Mon, 02 Sep 2024 00:37:21 GMT

Hi Rick.

Thank you for your guidance.

What is Cinema OS? I've never heard of that before.

Steve Thomas

Re: EOS R5 C autofocus not working in video mode on EF lenses

shadowsports — Mon, 02 Sep 2024 06:59:12 GMT

Steve,

The R5 C is a hybrid camera that has two operating systems. Photo mode and video mode. Photo mode has the standard photo menus you're accustomed to seeing on a DSLR or mirrorless.body. Video mode runs Canon's Cinema OS. It runs completely independent of photo mode. There is no integration. It's the OS that runs on Canons professional Cinema series video cameras.

Re: EOS R5 C autofocus not working in video mode on EF lenses

stevet1 — Mon, 02 Sep 2024 11:14:18 GMT

Rick,

Thank you. I understand now.

I read up on the R5C yesterday. Quite an impressive camera.

Steve