Quote:
Originally Posted by Merlin66
Based on our work with spectroscopes.... we find that black anodised parts are very (I mean VERY) good reflectors in NIR and above. Velvet flocking recommended.
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Noted. Of course this is not intended to be very scientifically accurate. Just to demonstrate in general terms what objects look like in NIR as opposed to visual.
Quote:
Originally Posted by multiweb
Looks great Steve.  Have you tried to blend it with Ha and a Lum? Looks pretty cool mapped to RGB. See the stepped reflection you get on your bright stars? I've got the same on a refractor. I reckon the IR bounces internally in telescopes where visible light and other bandpass don't. |
Thanks Marc. Don Goldman says that the stepped reflection is due to the CCD cover slip not being optimized for canceling out IR reflections so I think your explanation is pretty close to the truth.