[APML] Filter Question

["Dave Cole" <dave@oregonimage.com>]

Hi,

I just ran across a dichroic filter I bought surplus a few years ago, and
was wondering if someone might have even a clue of how I can tell what the
bandpass for this filter may be with no test equipment...  Looking directly
through the filter it gives everything a light greenish cast.

It does pass a laser pointer with very little loss, (as far as I can tell
using my eye and white paper), no markings on teh filter of any kind.  It
looks like a True Technology Dichroic Filter of some kind, but the threads
are NOT for an eyepiece.  I looked at them and they are corser than the
eyepiece threads.  Anyway...  Any ideas?

Dave



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