[APML] Help with this image

[Nicola <nmontec@libero.it>]

Dear All,

I just came back from a Star Party at Frabosa Soprana (CN), Italy and I tried
for the first time a medium format camera of mine (Pentacon SIX TL) which a
bargained last october, willing to try medium format world.
I was very disappointed with the result of the image at the edge, the stars look
very funny despite i stopped down the lenses of two stops (f/4).
This is the raw image just came straight out of the scanner.
At the beginning i thought it was coma, but I noticed for instance that the
aberration is no centered in the centre of the frame but slightly down right, so
there must be something else apart from a serious coma. Moreove some fo the
stars look like a small crescent moon on one side).

Can you please all fo you experts out there try to figure out what  happened?

Ciao!
Nicola

http://astrofoto.laza.it/astrophotos/Resized_Cygnus.jpg

Astrophotos By
Nicola @
http://astrofoto.laza.it


_______________________________________________
Astro-Photo mailing list
Astro-Photo@seds.org
http://seds.org/mailman/listinfo/astro-photo