[APML] First Post -- 67 Image, need Help

[Todd Leen <tleen@cse.ogi.edu>]

Folks,

I've been shooting 35mm with a Sky-90 on an AP-400 GTO for
about two years with decent results.  Wanting to move up to
67 format, I bought an AP Traveler (and the new field flattener)
and took this image in September --

    http://www.cse.ogi.edu/~tleen/astro/GammaCygni67.html

There's a bigger version at

   http://www.cse.ogi.edu/~tleen/astro/Gamma001Bigger.jpg  .

This is a 1 hour exposure at f/6 on E-200 in a Pentax 67 body,
guided by an STV with E-Finder.  This is an uncropped image. 
I didn't record the humidity that night, but recall there was significant
dew while cleaning up.

Does anybody have an idea of what the star elongation in the upper
and lower right corners is from?  (Film creep, problem with
the flattener ...?)  I haven't had a chance to get more exposures
with this setup.  I've never seen this with my Sky-90 on 35mm.

Thanks in advance.

Todd Leen


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