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05-22-2010, 04:46 AM   #1
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[langtitle=fi]noise at K7 viewfinder[/langtitle]

Hi all!

I just bought a brandnew Pentax K7 camera with 18-55 kit lens. I like my new camera very much, but I have a little problem.

There seems to be a lot of noise in viewfinder, samekind if I take a photo with ISO 3200 or more. Is this normal with Pentax k7 or is there something wrong in viewfinder. Photographs seems to be normal ( no noise) in LCD screen and also in computer.

Thank you very much and sorry about my bad english.

05-22-2010, 06:19 AM   #2
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Can you elaborate a little? I am not sure what you mean by noise. Like high ISO noise? The viewfinder is a reflected (and refracted) view of your subject through the lens, so there is no artificial rendering (except for all of the information the camera gives you).
05-22-2010, 06:48 AM   #3
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My guess is that he thinks the viewfinder is not 100% clear but a little textured - this is normal.
05-22-2010, 06:51 AM   #4
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May be the automated translation is off? But are you really taslking about the optical viewfinder or about the preview on the lcd screen?

In the optical viewfinder there is a matte screen, which has a fine grained texture, which may become visible under dim light (which would match your high ISO requirement) - but this graininess has nothing to do with electronic noise and it has nothing to do with ISO setting - it is only dependend on the ambient light. That is basically the same with any SLR, be it digital or film.

05-22-2010, 07:53 AM   #5
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Yes, I was talking about optical viewfinder. I guess a little texture there is normal. In my previous camera it wasnt that visible.

Thank you for answering!
05-22-2010, 09:02 AM   #6
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Joo se on normaalia, focusing screen aiheuttaa sen.

Terveisin, Miikka.
05-22-2010, 09:17 AM   #7
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QuoteOriginally posted by alex76 Quote
Yes, I was talking about optical viewfinder. I guess a little texture there is normal. In my previous camera it wasnt that visible.

Thank you for answering!

I think you will see this granular appearence in the viewfinder when you are out of focus. It disappears on achieving spot-on focus. As has been noted it is more apparent in low light. Nothing to worry about!

05-22-2010, 11:35 AM   #8
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As others have said, it's normal. The focusing screen needs to have some texture in order to work. I suspect your last camera was a point and shoot which does not have a focusing screen in the light path.

05-22-2010, 12:44 PM   #9
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Ok. Now that I know its normal, it doesnt bother me at all anymore. ;-)

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