Re: OPTICS FOR TASS: REFLECTOR OR REFRACTOR?

[Cameron Tully-Smith <cameron@zippy.sonoma.edu>]

At 10:56 AM 1/7/98 -0500, you wrote:
>I would think it useful to have a high-resolution scan of some film image
>of a reasonable starfield, just to look at the image in detail. The focus
>would have to be excellent, and presumably the camera holds the film flat.
>The image should not be comressed. I would imagine the TASS Web site could
>hold some of these sample images, or at least data derived from them. The
>field of view size must be known, and of course film type and exposure.
>The tradition is Kodak Tech Pan, a well-known black and white film.
>A useful image would be a known star cluster or field. Say, the DOuble
>cluster, it's pretty wide: if we have a choice that is.  A known field
>is preferable to an unknown field.

I'd be happy to take some star field shots when I get a clear night here.
The star field shots that I have already taken with the Mak are not 
in focus or were on a mount that doesn't track well (and wasn't guided).
I normally shoot on PPF...  If Tech Pan is a necessity, could we work
something out so that someone could send me a roll of hypered TP?
I don't have any experience with TP, but I assume that you'd want the
shot taken with hypered TP since it's slow otherwise.  If someone
could send me a roll, I'll keep it in the fridge or freezer (whatever
is recommended) until I get a clear night.  Then, I can shoot and send
the roll back to that person for processing (I don't have a darkroom).
If all this is too much trouble and what is needed is a fine-grained
shot, I have some unhypered Royal Gold 25 that I could use.

Cameron :)
Cameron Tully-Smith
cameron@cs.sonoma.edu
http://www.cs.sonoma.edu/~cameron