Re: [APML] Reciprocity Index for provia 100F

[Robert Reeves <reeves10@swbell.net>]

> Ok...scratch the first question...found it in the archives.
> But how does one test?
>
> Brian

Go to http://www.robertreeves.com/filmtest.htm to see how I did it for my
book "Wide-Field Astrophotography".  Its simple to do once the test rig is
built, but it does take a while to cycle through the test exposures.  I
don't advertise this as a laboratory accurate method, but it will give an
idea of which film to try under the stars and which film to forget about.

BTW, if you follow the links further to the actual tests I did, beware
because a lot of those films don't exist anymore or have been reformulated
into astronomical uselessness.  I will not retest newer films until I
prepare the next printing of the book.

Robert Reeves                      reeves10@swbell.net
520 Rittiman Rd.                   www.robertreeves.com
San Antonio, Texas 78209    210-828-9036
USA                                     29.484  98.440  200 meters


--  APML Archives at <http://astro.umsystem.edu/apml/>  ---
             Unsubscribe at <majordomo@seds.org>