RE:_Speaking_of_CCD_Accuracy...

[East75th <east75th@xxxxxxxxxxxxxxxx>]

>
>How do you put a neutral density filter into a film scanner? This does
>sounds like a good test.

Cut out a clean piece of Wratten filter and mount it a 35mm slide 
mount.  Also cut out a piece of 35mm B&W film frame and place it so that it 
occupies the center.  You need that so that the scanner (at least the 
LS-2000 and LS-8000 do) has something to focus on.  You take the 
measurements off the Wratten filter area, of course.

>No optical system is perfect, so I could believe some light fall off at the
>edges. I'm going to save the tail from the next roll of XP2 I shoot and use
>it as a neutral density filter to scan.

This won't work as well because developed film isn't really as uniform as a 
Wratten, grain, etc.  Obviously the Wratten has no fall-off, no variation 
in density, another advantage.

Dane Kosaka


-
Turn off HTML mail features. Keep quoted material short. Use accurate
subject lines. http://www.leben.com/lists for list instructions.