Quote:
Originally Posted by lepton3
Thanks David, and Steve.
Hi Russel, thanks for the comment.
I have tried using an IR sensor on a colour CCD, and it actually works reasonably well, as the colour filters on the chip are usually quite transparent to IR. I think the Canon CMOS sensor might not be quite as sensitive as a Sony CCD to long IR, but I expect it would still be reasonable.
You would be aware you need to remove the built-in IR block filter before fitting an IR longpass filter.
Even though the IR pass result will look mostly mono, you still need to de-bayer the frames when stacking, as the RGB pixels have different sensitivity due to the colour filters, and will give a noise pattern if you do not.
Combining an IR layer to RGB images often gives better contrast, so would be worth trying.
Have not tried UV with a colour sensor, I've read it gives poor results as the bayer matrix colour filters block out too much UV.
-Ivan
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Thanks for the heads ups and tips Ivan - I thought about giving it a go last year but never got around to getting the filter - thanks for inspiring me to have a crack
i'll get off my butt and order it.
Cheers,
Rusty
ps - yup i have full spectrum conversion on the canon