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Occasional Contributor
Posts: 12
Registered: ‎11-02-2018
Accepted Solution

Canon Mirror Lock?

[ Edited ]

Hi,

 

I use my 5DSR mounted in the belly of an airplane to take an image once a second for 4 hours at a time. I don't look through the camera and would rather the mirror not take all that abuse. On the old SLRs, you could manually lock the mirror up and keep it up. I know there's a feature on the 5dsr that they CALL mirror lock but it just lets you delay the shutter a second or two after the mirror flips up...which wouldn't work for what I do. Does anyone know a way to lock it up and keep it up?

 

Separately, the Canon manual says: "When you use a remote switch and do not look through the viewfinder, stray light entering the viewfinder can cause the picture to look dark. To prevent this, use the eyepisece cover." I don't understand. Could this affect photos?

 

Thanks!

Honored Contributor
Posts: 5,607
Registered: ‎11-13-2012

Re: Canon Mirror Lock?

"Separately, the Canon manual says: "When you use a remote switch and do not look through the viewfinder, stray light entering the viewfinder can cause the picture to look dark. To prevent this, use the eyepisece cover." I don't understand. Could this affect photos?"

 

Yes. The exposure meter can be "fooled" by light entering the eyepiece. It depends on the particular lighting situation. If the belly of the plane is dark the impact would be less than if the camera was set up in bright daylight on a tripod.

John Hoffman
Conway, NH

1D X, Rebel T5i, Many lenses, Pixma PRO-100, MX472, LRCC Classic
VIP
Posts: 10,937
Registered: ‎12-07-2012

Re: Canon Mirror Lock?

No to the first question and possible but unlikely to the second question.

EOS 1DX and 1D Mk IV, even less and less other stuff.
VIP
Posts: 10,937
Registered: ‎12-07-2012

Re: Canon Mirror Lock?

That is a lot of shots no doubt. Smiley Surprised  I am glad I am not the one who has to go through all of them.  How often do you shot that many times in a 4 hour session? I have colleagues that have well over 1/2 a million clicks and still going. Your best go is to just use the camera until it needs a new shutter which will still be a long time.  $300 to $350 for a shutter so don't sweat it just use it.

EOS 1DX and 1D Mk IV, even less and less other stuff.
Occasional Contributor
Posts: 12
Registered: ‎11-02-2018

Re: Canon Mirror Lock?

Thanks for that. We're shooting that rate the whole 4 hours. Yes, it's a lot to go through!
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