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Old 19-02-2008, 05:29 PM
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Peter Ward
Galaxy hitchhiking guide

Peter Ward is offline
 
Join Date: Dec 2007
Location: The Shire
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Quote:
Originally Posted by Terry B View Post
Isn't that exactly the point?
You have 3 x more data in the RGB image so it will have much less noise.
Que?

Clearly you missed the point, as there is *not* 3x the data.

Each filtered pixel got the same 30 seconds worth of red, green or blue light.

The downside with a mono camera is you have to take 3 successive exposures, but a single shot colour does all three channels at the same time.

The mono camera has higher spatial resolution, in this case 33 mega-pixels if you count pixels in the same way as in colour cameras.

As to the point, well there are several.
CCD's
Higher QE, lower noise, less noise structure, better colour saturation, higher dynamic range.
CMOS.
Low H-alpha sensitivity unless modified, Easier use, requires external guider.

Last edited by Peter Ward; 19-02-2008 at 05:30 PM. Reason: typo
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