Astrophotography with the Nexstar SLT 102

Images processed with GIMP and/or Registax or DSS.

All taken with an 102mm F6.5 Celestron Nexstar refractor and Olympus 2020Z digital camera, using afocal projection.

By default, images are scaled by 75% and then cropped to 600x400. This gives scale of ~8''/pixel and roughly a 1.3o x 0.9o field for unzoomed images. Some larger objects are scaled by 50% (as noted), giving 12''/pixel and 2o x 1.3o. A few have not been treated this way yet, and are marked as 'old version's.

Click on any image icon to see the enlarged version ...


Comet Loneos - 3min, ISO200 - 17/10/07
Comet Kushida - 7.5min, ISO200 - 13/1/09
Comet Holmes - 4min, ISO200 - 28/10/07
Comet Holmes - 2min, ISO200 - 2/11/07

Comet Holmes - 9min, ISO200 - 8/11/07
Comet Holmes (50% scaling) - 10min, ISO200 - 29/11/07
Come Lulin - 11min - 1/3/09 (50% scaling - faked to look stationary)
Come Lulin - 11min - 1/3/09 (50% scaling)

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