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Astrokits - Cygnus central region - Exp # 4

Astrokits - Cygnus central region

taken with a Konica TC SLR with a Miida 135mm lens set to f/2.8. Film is Ektachrome Elite ll ISO 100 pushed 2 stops. Exposure 12 minutes, tracked with Astrokits Quartz-Stepper sky tracker.

I forgot to use my Lumicon minus violet filter. The resulting halos around the brighter stars were rather distracting. I found a script named "CCD Camera Fringe Removal" written for GIMP. It reduced nearly all the blue/violet and saved me much time. It took only 10 minutes to manually remove the remnants where the violet was converted to grey, which makes sense for normal pictures. Perhaps the script can be modified to turn the blue to black or near black. The script creates two layers that can be adjusted for the best effect. I also made some minor adjustments in GIMP to bring out the red regions.


I should mention Ektachrome Elite II pushed two stops creates a slide that is fine as it is. It's richness is quite beautiful to view by eye alone. I wish I could get more of it.

I do my scans with a Plustek 7500i and use the included Silverfast 6.6 software at 2400dpi. I make use of the various controls to bring out the best the slide has to offer.

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Taken on July 26, 1998