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IR filter Answered

Can I use a VHS as an IR filter?

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As in the magnetic tape inside the plastic shell?

No part of a VHS tape cane be used as an IR filter. Now if you have an old player sitting around those often had a plastic filter over the IR receiver. You can use that.

Cheapest IR filter is a piece of film that's been processed and unexposed. Ask at a photo lab, they'll give you some for free (if you ask nicely). :-)