From: Aplanatic{at}aol.com
To: atm{at}shore.net
Reply-To: Aplanatic{at}aol.com


Hi Richard,

> What I really would like is (1) some kind of field flattener lens, and (2)
> something like a Hasselblad camera back that automatically
> records date,
> time, and approximate RA and Dec.
>
> . . . Richard

You can have all of the above.  A simple achromatic field flattener close
the the Hassy back will give you almost perfect images over the flat field.
Distortion can be easily calculated from ray traces of the optical system. 
The lenses are easy to make by hand, and don't have very close tolerances.

-Dave-

--- BBBS/NT v4.00 MP