Re: Does anyone make UV/IR gelatin filters ?
UV/IR filters are dichroic filters, that consist of ultrathin layers of coatings, that cut out a specific light frequency by interference.
To cut out a range of frequencies, like for instance IR light, dozens of such coatings must be applied, usually by evaporation.
That is only possible on very flat and stable surfaces. That means glass, not gelatin.
Gelatin filters are absorbtion filters, that are opaque to certain frequencies and block them that way. Something quite different.
An IR absorbing gelatin filter is impossible. IR light is high energy, the filter would have to be quite thick and would heat up and melt....
B&W filters are threaded female on the front and can be ordered in all thread sizes.
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