Re: [OM] filters, again.

[Richard Schaetzl]

*- DORIS FANG -* wrote about an Tiffen filter:

>   It is a diffusion filter that doesn't halo much.

So it´s kind of a soft or fog filter.

There are other ways to control the contrast of an image without
sacrificing sharpness (which is sometimes wanted). 
One can use an lower contrast film like an Agfa RSX 50 or Fuji Astia. It
is also possible to reduce contrast by overexposing and underdevelopment
an film (pull development). I tried it out works very well.
For the contrary effect I suggest Fuji Velvia and for even more contrast
underexpose it with ASA 80 and overdevelop it (push development). A push
+1 development with this film results in very contrasty images with good
blacks. The resulting ASA80 of an +1 development suggest, that Velvia is
in reality an ASA40 film. Anyway, exposure is critical after this
process, one should test out the film before taking any important
pictures.
Naturaly with an pull developed film, one has a larger margin for the
exposures. Notwithstanding this, a test film would a good idea too, just
to get used to the low contrast.

Regards

Richard



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