Canon Community

MikeSowsun · 11-08-2022

Is anyone familiar with this unusual firmware version on this Canon EOS 5D Mk III?A member of a Facebook group has this firmware on his camera and I believe it is probably a “Factory Menu” firmware sometimes installed by Canon when they are servicing...

MikeSowsun · 02-24-2021

I recently started getting an error when using Chrome on my PC to access this Forum. Internet Explorer works fine, the error only occurs with Chrome, and only on this Canon Forum. If I use Chrome on my iPad it also works fine. Any ideas what is happ...

MikeSowsun · 12-27-2017

I own 12 different EF and EF-S Zoom lenses. 5 of them have a mysterious index mark on focal length zoom ring as shown in the photos below. The 24-105mm USM also has a little white dot. I circled the markings in Red. My 7 other Zoom lenses have no ma...

MikeSowsun · 12-16-2017

I have owned the BG-11 for a few years now and only recently got around to trying out the BGM-E11A "AA" battery pack. I noticed that the battery info says "BGM-E6" instead of BGM-E11A. ("BGM-E6" is the AA pack for the 5D Mk II) Is this normal? Does a...

MikeSowsun · 06-12-2026

Yes, that is a Sigma lens with a Canon FD mount. You woud need an FD to RF mount adapter.

MikeSowsun · 05-27-2026

@Vinny1 wrote: @deebatman316 @MikeSowsun @wq9nsc, you guys were right. We waited for nightfall and got into a closet and the film had indeed rewinded itself. We took it out and the camera came back alive. Thank you all for figuring this out!! Do yo...

MikeSowsun · 05-26-2026

@Vinny1 wrote: With the battery in, and in the ON position the film cannister blinks and in the OFF position, the blinking stops. When the battery is taken off, that icon disappears. That's good news. That is exactly how the camera behaves when th...

MikeSowsun · 05-26-2026

I think your camera has a serious defect. With the battery removed, you should not see the "film loaded" icon visible on the top screen. Even with film in the body it should go blank when the battery is removed. Because you are seeing the "film lo...

MikeSowsun · 04-11-2026

This thread is still useful and should remain open. There are sure to be others who will experience the same problem if they use this type of adapter with a Canon camera with lens firmware updating ability.

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Unusual Canon 5D Mk III firmware version 9.3.0 AB(34)

"Request Entity Too Large" Forum Error

Mysterious index mark on focal length zoom ring?

5D Mk III battery grip with AA magazine question....

Re: Lens Adapter for Older Sigma Lens

Re: Canon EOS 3 not booting up

Re: Canon EOS 3 not booting up

Re: Canon EOS 3 not booting up

Re: First vintage lens (helious44) unable to use on EOS 5D Mark III due to lens firmware update

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