Thread: The big Kahuna
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Old 14-03-2012, 07:20 PM
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Peter Ward
Galaxy hitchhiking guide

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Quote:
Originally Posted by alpal View Post
Peter,



Hi Peter,
I don't agree.
The DSLR is made to show what the human eye can see.
The human eye can't see all that red created by the infra red spectrum.
It depends if you want to see all the infra red in false colour.
The DSLR is giving you a true picture.

Not only that - what happened to all that blue information?
It's there because my camera recorded it.
Your DSLR camera has quite low QE at the critical hydrogen-alpha wavelength that dominates this nebula.

It is very visible to a warm human eye (being the very same wavelength that H-alpha solar observers view ) but it is outside (or very nearly) the gamut of colours a DSLR can capture with good QE.

Nothing false about. Suggest you Google David Malin's images of this object.

DSLR's simply can't see that part of the spectrum well and bias the result as best they can, ending up way too cyan.

Hope that helps.
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