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Charlie Hein
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Reged: 11/02/03
Posts: 6679
Loc: 26.06.08N, +80.23.08W
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Re: "DSO" Imaging Challenge Hall of Fame!
06/08/06 02:35 PM
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May 2006 "DSO" Imaging Challenge winner - 2020BC's image of Messier #5
Subject: M5 Globular Cluster
Camera: Canon 350D (unmodified) Prime Focus. Mirror lock enabled.
Scope: Unguided Meade LXD-75 SN-8 f/4. Baader MPCC Coma Corrector.
Exposure: 1 x 30secs, ISO 1600, Noise Reduction On.
Field: 45 arcMins wide (approx.) Cropped to 1600x1200 then reduced to 800x600.
Location: Canberra, Australia 29May06 (1200-1300hrs) UTC
Processing: Histogram, crop, reduce and unsharp mask in Imageready.
The home-made wire-mesh diffraction focuser that I use for selecting focus was placed on the front of the scope for this shot. This yielded the strong diffraction spike on the brightest nearby star.
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