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Old 07-01-2009, 07:51 AM
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Satchmo (Mark)
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Quote:
Originally Posted by netwolf View Post
Smaller CCD means you dont have to worry about a field flattner. A bigger chip will require some correction to match the curved field.
Unfortunately the curvature on the film plane is very strong and combined with a fast f ratio of F1.5 or so the images on a flat film plane will defocus very quickly very close to the optical axis.

You would probaly only have field of view of a fraction of a mm diameter before the star images grew unacceptably big.
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  #22  
Old 08-01-2009, 12:56 PM
astro744
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There is one for sale at http://www.astrobuysell.com/au/propview.php?view=803

I have nothing to do with the ad; I just noticed it there.

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