Re: [APML] New Illford Black & White film

["Lorenzo Comolli" <comolli@dido.net>]

Brian Roth wrote:

> Has anyone tried the HP Delta 400 B&W professional film? It looks to
> have spectral sensitivity well past H-alpha.

I've not tried this film yet, but I've tried another Ilford: SFX200 (non
hipered). This film has an IR extended sensitivity up to 720nm, so it sounded
promising to me. But when I've tried on North America nebula (with and without a
W92 red filter) I've discovered that there was nothing except the stars! Maybe
the reprocity is very bad on this film, or maybe there is a fall of sensitivity
at 654nm...

Someone else have tried this film?

Lorenzo


--
____________________________________________________________
Lorenzo Comolli
Internet: http://digilander.iol.it/comolli/
E-mail: mailto:comolli@dido.net

Socio del Gruppo Astronomico Tradatese
Internet: http://gwtradate.tread.it/tradate/gat/
____________________________________________________________





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