Re: [APML] Help with this image

[AikeM.Voelker-Jamin@t-online.de]

Dear Nicola,

I think the problem might be caused due to the fact that during the
exposure 
the film flatness got lost. I know of several astrophotographers who
installed a glas plate (from 6x7 slides) at the rear of their Pentacon
Six and receive excellent results now.

Clear Skies,
Aike
http://www.astrophotography.de
  
Nicola schrieb:
> 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
> 
> 
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