A7/A7R Light leaks reported + White Orbs issue?

Started 6 months ago | Discussions thread
Lattimer
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Re: A7/A7R Light leaks reported + White Orbs issue?
In reply to Chad Hardy, 6 months ago

Chad Hardy wrote:

Lattimer wrote:

John Triebe wrote:

I ran the same test with my NEX-7 and got no leaks. While I might be able to correct the problem using the methods you describe, the camera should be light tight as shipped. It will be going back.

John, I can replicate just what you got on my A7R. When I drop the ISO or cover gap (with rubber band for quick test) it goes away.

Does anyone know if this will matter for most shooting or just very specific shooting situations? I was blissfully unaware of this prior to this thread, and I'm thinking it's something I never would have known about if I had no read about it here.

It will matter if you do Long Exposure (LE) photography. Let's say you use Bulb mode a bunch to capture 20 or 30s exposures of landscapes at sunset. We do this to make the water appear smooth. If the leak is bad enough, it will ruin your image. There were a few posts earlier in this thread with pictures of daytime LE and the leak that were ruined. It could also happen with night LE (astrophotography or cityscapes are common).

If you don't shoot this way, then ignorance is bliss. If you do, best to do some tests with extreme settings to be sure it will never crop up for your type of shooting.

Just curious what do you have to drop the ISO to for the leak to disappear?

I did 25sec at max ISO with bright flashlight and basically looked just like what John posted. Dropped to ISO 3200 and it was gone. I did not try anything in between those two settings.

Edited to add: tested with FE35 and metabones III with samyang 14mm. Same result either way.

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