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Old 23-01-2008, 10:38 PM
tornado33
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tornado33 is offline
 
Join Date: Jan 2005
Location: Newcastle, NSW, Australia
Posts: 4,116
Thanks all

Quote:
Originally Posted by gary View Post
Hi Scott,

Thanks for the images.

I use to play with Kodak IR transparency fim back in the mid-70's and when
processed it produced funky false-color results which suited that era.

Did part of your camera's mod include removing the internal IR blocking filter?

It's interesting that the image ended up being monochromatic rather than
the CCD pixels with the red filtering being more sensitive than the blue and
green ones.

Best regards

Gary
Yes, I bought the camera through Hutech. They remove the IR blocking filter and replace it with clear antireflection coated glass of equal thickness, that way autofocus si still accurate and the chip can recieve unfiltered IR light. It can "see" a hotplate before it gets to red heat.

For normal astroimaging I use an IDAS uv/ir filter where I dont want IR light coming through
Scott
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