R1: Playing with infra-red

Started Apr 11, 2006 | Discussions thread
Andy Williams
Andy Williams Forum Pro • Posts: 24,495
Re: Near infrared

marbo uk wrote:

I believe the hoya r72 infrared filter does not quite block all
visable light. This is why photos with this kind of filter always
come out red or pink depending on how sensitive your camera is. You
can get darker ir filters that block all visable light but this
also means much longer exposures.
I use an old unmodified olympus c-2020 camera and hoya r72 filter
and can handhold in bright light.
I use the little bit of red visable coming through to add colour to
my ir photos by swapping red/blue channels like these.




These are mint - I love them!

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