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01-17-2009, 12:39 PM   #1
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Underexposed without eye to viewfinder?

Hello

I don't understand - why does my K10D underexpose photos when I'm not looking through the viewfinder? What does the presence of my face have to do with it?!

01-17-2009, 12:53 PM   #2
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You might want to follow this previous thread:

https://www.pentaxforums.com/forums/pentax-dslr-discussion/39336-what-differe...der-makes.html
01-17-2009, 01:08 PM   #3
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Thanks very much for that - I didn't spot that thread when I searched for "viewfinder" earlier!
01-17-2009, 03:21 PM   #4
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Most people do not notice this issue unless they are shooting in a bright environment with slower lenses. I first noticed it when using M-42 lenses in AV mode. Pentax includes a small cap for the viewfinder to use under this type of situation as well as for long time exposures (light can leak into the mirror box from around the mirror during the exposure itself).

In the past, some models of film cameras actually featured a small shutter-like blind for the viewfinder that was worked with a small lever. Very cool.

Steve

01-17-2009, 04:16 PM   #5
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Or just use manual exposure which is not affected by stray light through the viewfinder.
01-17-2009, 04:32 PM   #6
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QuoteOriginally posted by jbinpg Quote
Or just use manual exposure which is not affected by stray light through the viewfinder.
it is if the shutter is long enough

that and assuming you meter with your eyes to the viewfinder


in the cases where this makes a difference, you would often meter away from the camera, after composing.
01-17-2009, 08:36 PM   #7
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If you use the green button for metering in manual mode, yes, I can see how having your eye to the viewfinder may impact initial metering. But once the exposure and shutter speed have been set, they cannot change in manual mode. Otherwise it would be some kind of automatic mode. I never use the green button in manual mode. I set what I think is close to the right settings, chimp, then adjust. Too many years of using the sunny 16 rule to break the habit.
01-17-2009, 11:38 PM   #8
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QuoteOriginally posted by jbinpg Quote
If you use the green button for metering in manual mode, yes, I can see how having your eye to the viewfinder may impact initial metering. But once the exposure and shutter speed have been set, they cannot change in manual mode. Otherwise it would be some kind of automatic mode. I never use the green button in manual mode. I set what I think is close to the right settings, chimp, then adjust. Too many years of using the sunny 16 rule to break the habit.
What is happening is that light is leaking into the camera and messing with the exposure. It's not a metering problem.

01-17-2009, 11:54 PM   #9
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QuoteOriginally posted by alohadave Quote
What is happening is that light is leaking into the camera and messing with the exposure. It's not a metering problem.
Oh, I think I understand. But I was pointing out that it can only affect exposure if shooting in some kind of automatic mode. Should not be a consideration for manual.
01-18-2009, 10:19 PM   #10
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QuoteOriginally posted by jbinpg Quote
Oh, I think I understand. But I was pointing out that it can only affect exposure if shooting in some kind of automatic mode. Should not be a consideration for manual.
That depends. If you use the metering indicator when setting your exposure in manual, you will again want to have the viewfinder covered or else the indicator may incorrectly indicate slight overexposure.
01-18-2009, 10:24 PM   #11
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Get a LX! It doesn't have this problem.
01-18-2009, 10:48 PM   #12
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Ummm. ...check the sig. I have two!!!!

Jack
01-19-2009, 01:07 AM   #13
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QuoteOriginally posted by jbinpg Quote
Ummm. ...check the sig. I have two!!!!

Jack
Good for you. I was refering to the OP.
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