Astrophotography with the Nexstar SLT 102

Galaxies 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 ...

NGC2903 - 11min, ISO200 - 20/3/09 (bright sky)

M31 &M32 & NGC204 (50% scaling) - 34min, ISO200/400 Jan/Feb 2009
M33 - 29min, ISO200 - 27/10/08 + 2/12/08
M51 (+ NGC5198 top left) - 20.5min, ISO200 - 28+31/3/09
M65+M66+NGC3628 - 4min, ISO400 (Northumbria) - 27/3/08

M65+M66+NGC3628 - 19min, ISO200 - 28+31/3/09
M81 + M82 - 9min, ISO200 - 11/2/09
M84 and others - 8.25min, ISO400 - 28/3/09
NGC2903 - 11min, ISO200 - 20/3/09 (bright sky)

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