filtration for sfx200

[Cameron Shaw <cameron@xxxxxxxxxxxxx>]

 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



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