A900 metering question

[Rand47]

I've tested metering while in M mode, and then shooting MLU both with, and without closing the eyepiece shutter. No difference in exposure / histogram.

I do see a shift in exposure w/ the eyepiece shutter open if I'm shooting in A or S mode (as one might expect from light entering and affecting).

My question is: is there any "other" reason to close the eyepiece shutter when working in M mode, since it does not impact metered exposure reading or anything I can see as degraded image quality in the files from light making it to the sensor?

 

[mazor]

hmm thats strange indeed. the only thing i can think of is the there something in the software of the a900 that can be "auto compensating" for long exposure and in M mode is more aggressive correction.