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But I find Arista EDU 400 processed in XTOL is very close if not at ASA 400.
It's nonsense to have a rated 400 iso that behaves much like a 200 iso and at the same time a true 200 iso emulsion together...
Of course can be used at 400, but also can be used at 800 or even 1600. But what for? That's not my point. What if in my country the fx-11 isn't available?
Foma must diversify better his offer, imho, in that a 400 emulsion must be almost a true 400 emulsion and not a 200 in disguise.
If i want a 400 iso film I don't buy Fomapan 400 because isn't a true 400 iso film. Otoh if I want a true 200 iso film I'll buy a true 200 iso film and not Fomapan 400. That's my point.
See the graphs here http://www.digitaltruth.com/products/foma_tech/Fomapan_400.pdf. Fomapan 400 action ISN'T a 400 iso speed emulsion, period.
A lot of folks think Fomapan 200 works best at 100 too. The question becomes, is the 400 actually faster than the 200? Or, even if it isn't, are there enough differences to justify choosing one over the other?
1. You can use any common developer, no need for fx-11
2. Go tell the Ilford guys that Delta 3200 should be labeled Delta 1250. Or that you will not buy it because "it is not a true ISO 3200 film."
Also tell the people that expose Acros at 200,
the people that use hp5 at iso 800 or 1600
... that they are "WRONG", that they "should use a true iso 200 (or 1600) film instead."
Tell the same to the people that shoot Delta 3200 at 3200. Also, to all of them who shoot hp5 at iso 250, tell them how foolish they are!! (How funny, foma 400 being iso 250...)
The posts above explained perfectly why there is a difference between true ISO speed and commonly used speed. But it seems that you don't want to understand.
3. Yes I have seen those graphs many times since about 4 years ago. In fact i think I know the fomapan 100&400 datasheets by heart. Who is claiming that fomapan 400 is a "real speed" iso 400 film? not me.
Meanwhile i'll keep shooting Foma film at their BOX speeds and stay happy. The film is there to realize the vision of the photographer, not to be true to a certain sensitometric curve.
Amen! You tell em!
I actually love AEU/Foma 400. It is inexpensive and quite flexible. I have some cameras where I use it primarily at EI200. Most of the time I just use it at box speed and get really good results. I have even taken it up to EI1600 and down to EI100 when it was all I had. With the appropriate developing times it seemed to respond quite well. It also responds very similarly in 120 roll film and 4x5 sheet film, though of course the grain is less in the larger formats.
As for grain, so what? Just exactly what is wrong with a little grain? If you don't like grain then these types of film are certainly not for you anyway.
As you can see, not every developer is best "suitable" to Fomapan 400. D-76 yields high b+f while Xtol doesn't. Every developer "changes" the speed, the look and the feel of the film.
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