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Old Nov 6, 2002, 9:54 AM   #11
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jjgncmg / sjms

I've just found what the mechanical shutter is used for in the D7's:
It reduced smear by 30 dB to a level of approximately 116dB by performing the following sequence:

Vertical register high-speed transfer -> Readout -> Mechanical shutter close -> signal output.
Look @ the signal timing in the datasheet, it's quite interesting. It almost works in reverse! Kind of make sense, how else can one looks through the EVF?
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Old Nov 6, 2002, 11:36 AM   #12
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Thanks. I think I get it. The mechanical shutter acts as a shutoff of the light at the end of the exposure. This reduces smear caused by an electronic shutoff. And yes if the shutter was closed at other times how would we see through the viewfinder.
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