In article <48g4hi$om1 at remus.reed.edu>, Dan Baggott <dbaggott at reed.edu> says:
>>Does anybody know a supplier of a 37mm 23A filter? We have Apple's
>Quicktake150 digital camera with an adaptor (to 37mm) and close-up
>lenses, now all we need is the 23A filter and we can start taking
>pictures of our EtBR-stained gels. Any help would be much appreciated.
>(I've sent inquiries to rec.photo.misc and .marketplace, as well as
>rec.video, with no luck.)
>Reed College Biology Department
>>Kodak has discontiued making the 23A filter.
They have substituted the 22 filter wich is virtually
identical in absorbsion characteristics. We use it in
our Lab at Sigma Chemical. I take it you need a
37 mm screw-in glass filter. I would call Kodak
at 1-800-242-2424 to find a source for such a filter.
Sigma Chemica, St. Louis