Jim <jb...@cfw.com>

Can someone help me with some specific information I need concerning the
heat absorbing filter used in Kodak slide projectors, or failing that, the
heat absorbing filters used in enlargers?

I need to know the infrared cutoff wavelength of these.  I suspect that
these are basicly a "low pass" filter for all UV and visual wavelengths, but
where would the cutoff be:  880nm?, lower, or ??

thanks
Jim
jb...@cfw.com