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Forum: Film SLRs and Compact Film Cameras
02-18-2012, 05:20 PM
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Sounds like you are managing the gear properly. Normally, stop-down metering is sort of the "gold standard" for light measurement and three stops off is pretty severe. The only possibility that I can think of other than a defective camera, is that you may inadvertently be shooting at the low end of the meter's sensitivity.
Your *ist has great meter sensitivity (EV0-EV21(100)), but EV0(100) at the meter comes quickly at smallish apertures in dim light. Meter linearity can fall off well before the low end of its range resulting in underexposure. Be aware that this characteristic has nothing to do with the supported ISO range. The meter can support ISO 6400 as a setting, but that does not mean that it can see in the dark.
As for measuring against the K10D...be sure and use an "A" contact lens for your measurements. The K10D is legendary for poor meter performance in stop-down mode. It is possible that your *ist suffers from the same issue.
IIIiiirrrcccc... (sound of brain coming to a screeching halt). I just took a wander through the *ist manual (downloaded form pentaxusa.com) and low and behold the lens compatibility matrix has the same sort of caution statement for stop-down metering as for the K10D. Sorry to say, but your body probably is not so good with legacy glass.
As a replacement, I can suggest any of the legions of Av and manual-metered K-mount cameras available from Pentax, Ricoh, Vivitar, Cosina, and others. Even better would be a screw-mount body. In actual operation a M42 body is a lot handier with M42 lenses than an adapted K-mount.
Steve
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Forum: Film SLRs and Compact Film Cameras
02-18-2012, 10:22 AM
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You are stopping down to meter, I assume?
It might help if you outline the flow (steps) you use with the M42 lenses.
Steve
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