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Forum: Pentax DSLR Discussion
11-05-2007, 12:34 AM
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It is normal. It is actually a problem with stopped down metering. When the user stops down the aperture of the lens, the TTL metering light sensor receives less light than when it is wide opened.
In your case, you shot in an already low light situation. After stopping down further, at some point, the light metering cell simply cannot "see" anymore which is called to be "out of the metering range" (for this case, it is out of the lower limit). In case of wide opened metering mode, there is a warning to tell the user that the lowest metering range has been reached and the sensor is unable to measure further, but in stopped down metering, there is no aids and indication to tell the user that, for the current Pentax's design.
Do note the primitive problem of stopped down metering is still the light loss caused by teh aperture cut which cause even more troubles to take the metering readings in low light conditions.
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