Re: [ATM] Film Slit Test

["Jeff Baldwin" <bald@centurytel.net>]

I like the page you have on this.  It seems to me that exposing film on the 
caustic test would be no more protected from temperature anomolies than 
visual testing.  When I caustic test my lateral measurements are usually 
repeatable to the 0.0001" range.  The film would be a good record though. 
Have you tried this with ccd rather than film?

Again, I like your page.  Well done.
JBald

Jeff and Glenda Baldwin
Beaver WA
http://home.centurytel.net/bald



> Tried Caustic & LWT.  Because of difficulties getting
> consistent measurements (temperature, etc.), used film
> to records slit images.  The film is then scanned into
> Photoshop where the measurements are taken.   Dall &
> star tests on a 12.5" f4.7 have confirmed the accuracy
> of the test.   For further details please go to 
> http://www.theunion.net/bjthomas/
>


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