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Old 27-09-2016, 07:19 PM
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luka
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Join Date: Apr 2007
Location: Perth, Australia
Posts: 1,126
Bojan, can you measure the transmission of the filter in the far IR? A clear light globe with a glowing filament will be a good source of IR.

The 450D sensor will happily detect photons at wavelengths over 1100nm and your filter seems to start transmitting again around that range. See for example here.
On the other hand the Canon filter in your unmodified 60D may be blocking this far IR.
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