Re: filtration for sfx200

[Jaap Los <imagefotografie@xxxxxx>]

Cameron Shaw wrote:
> 
>  Hi,
>         As you will probably all know Ilford SFX200 film ( 200 ISO) is an
> extended red sensitivity film rather than a true infrared film like Kodak HIE. If
> you use a #25 red filter it will be a little but not be very different from say Ilford
> HP5plus with a red filter. Upon using a #87 filter you will have unexposed
> negatives!  However it is possible to produce an infrared effect by using B&W
> 92 filter, the best choice because  it is just about possible to frame the image
> (but not focus). Hoya R720  works but is rather visualy opaque similar to
> Heliopan 695 which also works. As a start try metering with no filter and then
> exposing with B&W 92 and +3stops. Not really possible to meter through the
> filter.
> 
> Has anyone obtained interesting results with SFX200 film? It is now available
> in 120.
> 
> Cameron Shaw
> Hi Cameron and others
Yes, I have some experience with Ilford XFS200 35 mm film, so not with
the 120 type. You are quite correct by saying, that the best results
come with B&W nr. 92 filter. The manufacturer also recommends this
filter for the best results. It's almost opaque, but you have to meter
without the filter and afterwards place the filter over the lens prior
to shooting. I must say that I'm not at all diaappointed about the IR
effects on my pictures. Under sunny conditions I exposed the film at 200
ASA without the filter. Developed 8 1/2 minute in XTOL 1+1 at 20 degrees
Celsius gave me excellent negatives. Still I prefer HIE!!
Succes!
Jaap Los


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End of Infrared-Digest V0 #414
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