re: Using 89B Infrared Filter with Regular B&W films

[Roger Hein <rogein@xxxxxxxxxxxx>]

>Can anyone reccomend a regular B&W film that could be used with this filter
>to get unrealilistic contrast between the sky and clouds?  Or maybe my
>technique needs improvement?
.............

>       Ilford has an extended red sensitivity film called SFX.  It's not a
>true
>IR film, but it might fit what your looking for.
>
>       I've never used an infrared filter,  but I have heard that they are
>opaque to visible light and transmit infrared.  If so, I don't believe you
>could shoot a panchromatic film through it.  Of course, the TTL metering
>would also fail, and many cameras default to using their longest available
>shutter speed.

I've used Ilford's SFX with the 89B filter.  I found the effect only
slightly more pronounced than when using this film with a #25 filter.  No
suprise I guess since it's not a 'true' infrared film.  Perhaps using the
#25 in conjuction with a polarizer would produce the desired effect (with
Tmax)?

Cheers,
Roger...



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