View Full Version : Fortepan 400 - Schwarzschild Effect

Oliver Ruether
28-Dec-2001, 16:35
Hi, does anybody know anything about schwarzschild and Fortepan 400??

Ed Burlew
28-Dec-2001, 22:33
My only comment on Fortepan 400 is to rate it at 200. I has alot of grain. If you can get the Fortepan 200 and rate it at 100 then you have a MUCH better film and in T max developer I don't blow out the highlights, The prints are great.

Oliver Ruether
29-Dec-2001, 08:27
Thanks,I like the grain. I develop the fortepan 400 in emofin (9+9 rotation), so I get nearly 800 speed...

Doremus Scudder
29-Dec-2001, 13:14
Oliver, Perhaps you would get a better answer if the English-speaking community realized you were asking about the reciprocity failure characteristics of this film. Most don't know the term "Schwarzschild effect". I, unfortunately do not use this film, however, if it is a conventional film, its reciprocity characteristics should be similar to that of other (i.e. Kodak, Ilford) conventional films. I imagine that the info can be had at the Agfa web site or from a technical datat sheet from Agfa. Hope this helps, ;^D)

Oliver Ruether
29-Dec-2001, 16:36
Thanks Scudder, for your helpful hints. Again: "Is there anybody outside, who knows details about the "reciprocity failure " of Fortepan 400? I'm planing to use it at night.

Robert J. Triffin
29-Dec-2001, 20:24
Agfa's web site suggests as a rule of thumb: With exposures of one second and longer, simply double the normally indicated exposure to compensate for their film's reciprocity failure. Given the similar nature of Forte films, the Agfa recommendation is also likely to apply.