Astrophotography with the Nexstar SLT 102

Star clusters only:

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 ...

M35 & NGC2158 (50% scaling) - 7min, ISO200 - 11/2/09

M34 (1.5x zoom) - 8min IS200 - 20/11/09
M35 & NGC2158 (50% scaling) - 7min, ISO200 - 11/2/09
M38 & NGC1907 (50% scaling) - 8min, ISO200 - 2/12/08
M44 (50% scaling) - 80sec, ISO400 - 9/3/08

M45 (50% scaling) - 13min - 30/11/08
NGC457 - 3.5min, ISO200 - 16/10/07
NGC457 (1.5x zoom) - 4.2min, ISO200 - 17/10/09
NGC752 (50% scaling) - 11min, ISO200 - 30/11/08

NGC869+NGC884 - 1.5min, ISO200 - 17/10/07
NGC869+NGC884 (50% scaling, 1.5x zoom) - 9.7min, ISO200 - 16/10/09
NGC2244 (50% scaling) - 8min, ISO200 - 4/3/08
NGC2264 (50% scaling) - 9.5min, ISO200 - 12/2/08

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