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10-27-2008, 11:24 AM   #1
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Problem with ist DS

I've had my ist DS for over 2 years but recently I seem to have a problem. The image, through the viewfinder, is quite dark. With a telephoto lens, I can barely make out what I'm looking at.

Any help on this>>

10-27-2008, 11:42 AM   #2
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I cannot suggest anything specific, but first thing that comes in my mind, easly capable producing such an effect is in some way stopped down aperture.

Since "by default" PK Mount lens is stopped down to max aperture and mechanically fully opens up when screwed on a camera i would check this mechanism for proper operation.

Last edited by ytterbium; 10-27-2008 at 11:42 AM. Reason: typo
10-27-2008, 12:57 PM   #3
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Sounds like the camera may be stopping down the lenses for some reason, possibly some sort of malfunction related to the dof-preview button?
10-27-2008, 01:10 PM   #4
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Is this with a lens that previously worked OK? I agree with the others who say it sounds like the lens is stopping down rather than remaining open. If this is a screwmount lens, that's normal. If it's K-mount, that's not normal unless you hold the DOF preview button. Could be caused by something wrong in the connection between the camera and lens - perhaps as simple as not having it attached all the way until it clicks.

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