At 3:17 PM +1000 19-11-01, Rob Geraghty wrote:
>...The "analog gain" actually
>changes the integration time ie. how long the CCD is exposed for...
>PS You can try changing the analog gain to a large value in Nikonscan and
>you will see how it slows the scanner down.
Interesting. I hadn't tried that experiment. The Analog Gain
sliders let you adjust the gain +/- 2 units, and the manual says each
unit is 1 EV, and (in conventional photography at least) an increase
of 1 EV should double the exposure time.
I've found that in addition to moving the master gain slider up 2
units, I can also move the R, G, and B sliders up 2 units and get
increasingly lighter scans (of slides).
I've assumed that this gives me a maximum exposure range of +/- 4 EV.
So it looks like when I move all the sliders all the way to the right
the scan should take 16 times longer than usual. I'll try this some
time and see if that's what really happens.
Bill Fernandez * User Interface Architect * Bill Fernandez Design
(505) 346-3080 * email@example.com * http://billfernandez.com