Re: [ATM] 3 Inch Off Axis Schmidt Camera?

[George Anderson <tillerman1@videotron.ca>]

How about a 3" Slevogt for CCD use?
Most of the CCD's have a very small imaging area so there would not be
that large a core to drill (I know it should be done first) and the
secondary would be rather small. The same would apply to the corrector.
Total length would be under a foot (30cm).
The smallest film schmidt camera that I know of is the old
Celestron/Epoch 5", and it had problems with vignetting on 35mm film.

George Anderson
Montreal Canada

Clear skies and good health

Mark Holm wrote:
> 
> How about an on axis schmidt with a field flattener and a ccd detector.
>   Probably have to custom build the ccd and use liquid cooling to get
> the heat sink and the heat out of the line of fire.
> 
> Not that I know how to do any of this.
> 
> Mark Holm
> mdholm@telerama.com
> 
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