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Murnaghan infrared filters
These are 3 1 1/4" near infrared filters that I used in my first experiments with infrared imaging. Given that I long ago moved to 50 mm filters they aren't much use to me any more.
Filter 1 passes wavelengths longer than 7nm and blocks everything else
Filter 2 passes wavelengths longer than 7.8nm and blocks everything else
Filter 3 passes wavelengths longer than 8.3nm and blocks everything else
Using these filters together you have the possibility of doing colour infrared images although I only ever used them for monochrome.
$60 for each filter or $175 for all three plus postage
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