Thread: IR blocking filter
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Old 23-09-2021, 11:24 AM
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Merlin66 (Ken)
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Merlin66 is offline 		 
Join Date: Oct 2005
Location: Junortoun Vic
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IR blocking filter
Why is it so difficult to find an IR blocking filter (say>700nm) with NO UV restriction (ie <380nm)???
They all seem to be variations on the UV-IR blockers.
I'm looking for a IR blocker which still allows access to CaK/H at 393nm
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