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06-30-2010, 08:27 PM   #1
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Finger Print On Mirror

Looking through the viewfinder I see a a finger print.

I thought it was on the VFs glass, but the print remains after cleaning.

So I pulled off the lens and tried other lenses, but the finger print remains.

Therfore it must be on the mirror... and it bugs me.

Has anyone here ever successfully cleaned the mirror in their camera?

06-30-2010, 08:35 PM - 1 Like   #2
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Chances are you are simply seeing the microlens pattern embedded on the focus screen it's supposed to be that way (helps with focusing). Many people mistake that pattenr for a fingerprint. It tends to be visible more in some kinds of light than others.
06-30-2010, 08:44 PM   #3
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QuoteOriginally posted by JHD Quote
Looking through the viewfinder I see a a finger print.

I thought it was on the VFs glass, but the print remains after cleaning.

So I pulled off the lens and tried other lenses, but the finger print remains.

Therfore it must be on the mirror... and it bugs me.

Has anyone here ever successfully cleaned the mirror in their camera?
If you are focusing on a distant object, turn your focus ring all the way counter clockwise. If you are focusing on a near object, turn the focus ring full clockwise. The fingerprint will disappear.

sarc

As Marc stated, you are probably looking at the focus screen. If you had a fingerprint on the mirror, you could probably see it just by looking at the mirror. I Highly doubt that you could see one on the lens.

06-30-2010, 08:46 PM   #4
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QuoteOriginally posted by Marc Sabatella Quote
Chances are you are simply seeing the microlens pattern embedded on the focus screen it's supposed to be that way (helps with focusing). Many people mistake that pattenr for a fingerprint. It tends to be visible more in some kinds of light than others.
I don't think it's possible to see a finger print on the mirror through the viewfinder, since anything on the mirror is not in focus. Marc is probably right, either that or you actually have a finger print on the focusing screen itself.

06-30-2010, 09:58 PM   #5
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Marc must be right; from what I can see the mirror looks pretty clean.
07-01-2010, 06:52 AM   #6
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Marc is always right

btw... I do sorta mean that. I have found Marc's observations and responses usually insightful and measured.
07-01-2010, 12:45 PM   #7
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Thanks! I have been known to be wrong, of course, but generally not in the case of FAQ's like this one. Ask me next about the clunking sound you hear when you shake your camera, and I bet I get that one right too (no, the camera is not broken...)
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