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Mark III 5D

KamdynFuller
Contributor

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.

16 REPLIES 16

Tronhard
Authority

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?


cheers, TREVOR

Professional photographer, engineer and educator since 1980

"All the beauty of life is made up of light and shadow", Leo Tolstoy;
"Skill in photography is acquired by practice and not by purchase" Percy W. Harris
"A good swordsman is more important than a good sword" Amit Kalantri
Technique will always Outlast Tech - Me

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

jrhoffman75
Legend

Check that you haven't inadvertently actuated LiveView.

Screenshot 2022-06-01 153650.jpg

John Hoffman
Conway, NH

1D X Mark III, Many lenses, Pixma PRO-100, Pixma TR8620a, LR Classic

It's in Live View Shooting, not Recording.

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

John Hoffman
Conway, NH

1D X Mark III, Many lenses, Pixma PRO-100, Pixma TR8620a, LR Classic

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

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

John Hoffman
Conway, NH

1D X Mark III, Many lenses, Pixma PRO-100, Pixma TR8620a, LR Classic

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

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

John Hoffman
Conway, NH

1D X Mark III, Many lenses, Pixma PRO-100, Pixma TR8620a, LR Classic
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