topic Re: Mark III 5D in EOS DSLR & Mirrorless Cameras

Mark III 5D

KamdynFuller — Wed, 01 Jun 2022 14:59:42 GMT

My shutter will not open when I try to look through my Viewfinder. Please help! I can take pictures through the screen but when I switch back to the view finder, it is black.

Re: Mark III 5D

Tronhard — Wed, 01 Jun 2022 19:16:10 GMT

The likely cause is that the mirror is locked up, so it is blocking the pentaprism from displaying the image to the viewfinder, on the other hand the sensor is able to have an unobstructed view.

What lenses were you using when this happened?

Re: Mark III 5D

KamdynFuller — Wed, 01 Jun 2022 19:21:44 GMT

I was using the Canon EF 16-35 MM f/4L IS USM Ultra-Wide Zoom Lens

Re: Mark III 5D

jrhoffman75 — Wed, 01 Jun 2022 19:37:43 GMT

Check that you haven't inadvertently actuated LiveView.

Re: Mark III 5D

KamdynFuller — Wed, 01 Jun 2022 19:39:26 GMT

It's in Live View Shooting, not Recording.

Re: Mark III 5D

jrhoffman75 — Wed, 01 Jun 2022 19:41:23 GMT

Switch it out of LiveView and you will get your optical viewfinder back. It’s an either/or.

Re: Mark III 5D

KamdynFuller — Wed, 01 Jun 2022 19:43:35 GMT

It sounds like the shutter opens when I switch from live view, but viewfinder is still black unfortunately.

Re: Mark III 5D

Tronhard — Wed, 01 Jun 2022 19:47:25 GMT

A good point. I took the comment to mean about switching back to viewfinder to mean that they had actually knowingly activated the switch.

KAMDYN: please check the diagram on P20 of your manual, shown below: it identifies a button, just to the right of the viewfinder labelled Live View Shooting Switch. That switches between live view using the LCD at the back, and the optical viewfinder. Try checking that is not rotated, and if so rotate it back to vertical.
It identifies a button

Re: Mark III 5D

jrhoffman75 — Wed, 01 Jun 2022 19:49:37 GMT

In that case either mirror lockup is inadvertently set or your camera has a mechanical problem.

Go into the menu an reset all camera settings. See page 56 of your manual.

Wrench (yellow) menu page 4

Re: Mark III 5D

KamdynFuller — Wed, 01 Jun 2022 19:50:55 GMT

I have already done that. I'm assuming it's a mechanical issue as well. Thanks for trying to help!

Re: Mark III 5D

jrhoffman75 — Wed, 01 Jun 2022 19:57:18 GMT

Did you remove your lens and look in the mirror box?

Re: Mark III 5D

KamdynFuller — Wed, 01 Jun 2022 19:58:48 GMT

Yes, the Shutter is closed.

Re: Mark III 5D

Tronhard — Wed, 01 Jun 2022 20:01:42 GMT

When you open the camera, is the shutter exposed immediately? If so, then your mirror is stuck in the up position.

Re: Mark III 5D

KamdynFuller — Wed, 01 Jun 2022 20:04:30 GMT

It seems like the Shutter is getting jammed. I can touch it and it will come back down, but as soon as it takes a picture and goes back up it jams again.

Re: Mark III 5D

Tronhard — Wed, 01 Jun 2022 20:20:00 GMT

That would be normal if the camera is stuck in back in live view mode. If you have not done so, I would definitely do a camera settings reset. Can you confirm that the mirror, normally in front of the shutter, is always in the up position? Don't try to force it back down!!!!

Re: Mark III 5D

KamdynFuller — Wed, 01 Jun 2022 20:33:36 GMT

I have already reset the camera settings. I did not force it back down if I barely touch it, it comes down on its own and I can finally see out of the viewfinder. Once I click the button and take a picture, it takes the picture but the shutter is closed and I am no longer able to see out of the viewfinder.

Re: Mark III 5D

jrhoffman75 — Wed, 01 Jun 2022 20:53:55 GMT

Looks like you need a mirror box repair.