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.

  • James Cormier 2y

    Very nice Dennis. I love the rendition of the Ektachromes.
  • Dennis Harper PRO 2y

    Another Ektachrome film that works well is E200. Aside from a few scientific films, none of the film makers took the night sky into account in their products. Only by experimentation by amateurs did we learn what worked well. I remember testing Konica 3200 film on Halley's comet. The high ISO was good if you liked muddy skies. In the end EK Elite II and EK 200 surpassed all other films. Push in processing is needed and has little downside. B&W films are another matter
  • James Cormier 2y

    Yea, I've shot a few rolls of E200. Good stuff. Films were pretty bad during Halley. I got little to show. When Hyakuatake and Hale-Bopp appeared we had Super G + 400 and 800 as well as PPF and Gold 400, then PMJ. Films have slid since. Not much left. Fujichrome 400X is pretty good. For B&W there is Acros. It is superb out of the box or hypered, but don't expect much response to Ha. Great for starfields though. Got some 220 rolls of Konica Centuria 400 still in the freezer. Pretty grainy, but worked well. The cure for that is Fujicolor Superia 100. Alas, it is gone now too, save some left in the fridge.
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Taken on July 26, 1998
  • Konica Minolta TC
    135mm f.2.8 Konica mount
  • 100
  • Flash (off, did not fire)
  • Show EXIF
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