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M42
Greetings. My name is Andrew Peters and this is my first image posted on this site. I was active in the early 1990's using a variety of instruments including a 6" astrophysics refractor and a 20" f5 newtonian riding on a custom built fork mount. The mounting is old tech with no encoders while an SBIG ST-4 is used for guiding. The scopes incidentally were featured in the October 1994 issue of the magazine "Sky and Space".
After a long hiatus and now retired, the scopes are now set up some 2 hours north of Adelaide under a bortle 2 sky. M42 was imaged with the 20" using a nikon D750 camera and is a composite of 2 subs (16 + 600 secs at ISO 400) taken while experimenting with the coma corrector to sensor spacing. It clearly needed further adjusting. A cooled astro camera has since been acquired but the full frame nikon is still used on occasion for larger objects.
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