Re: [APML] Flawed astro slide - anybody take a look?

[Scott Justis <ngc2683@yahoo.com>]

Emmanuele,

--- Emmanuele Sordini <vega@ulisse.it> wrote:
> Hi list,
> the above mentioned slide is a short exposure
> (something like 10-15 secs) 
> taken by a friend of mine with a fixed-tripod camera
> and a Nikon widefield 
> lens (must be something like a 28 mm). You can view
> it at:
> 
> http://lonestar.texas.net/~genehorr/013225-mc.jpg

Those look like Newton's rings as Matt mentioned. Was
the slide scanned between a standard glass slide
mount?

Another cause of this pattern is a greasy fingerprint
if the slide was accidently touched. This happened to
me once when I had my color film developed at one of
those 1 hour film development places. The best
negative had a nice greasy thumbprint right in the
middle of the frame and the print showed it too.

Scott    
 


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