Dear group,
In an earlier thread - see http://www.astromart.com/forums/viewpost.asp?forum_post_id=659400&poll_id=&news_id=&page= - I had my first impressions of the M210 in relation to its potential for DSO work.
A few nights ago I had some free time at the end of an imaging session and I decided to take some test images of the beautiful edge-on galaxy NGC 891 in Andromeda.
For my sample result based on two hours total data, please see http://www.perseus.gr/Images/dso-ngc-0891-20x6min.jpg and which is based on twenty six-minute subs. I purposely pursued six-min test subs since my master dark library did not have a 10-min master dark for the cooling temperature I was working that particular night.
Please note this result has partial reduction, namely the use of a master dark and nothing else. The full resolution image looks much nicer and with the stars being very nice circles.
There is no question in my mind the M210 is a very good scope for DSO work and in spite of the general concensus to the contrary due to a supposedly non-flat field from edge to edge and its slow f-ratio.
Anthony.
In an earlier thread - see http://www.astromart.com/forums/viewpost.asp?forum_post_id=659400&poll_id=&news_id=&page= - I had my first impressions of the M210 in relation to its potential for DSO work.
A few nights ago I had some free time at the end of an imaging session and I decided to take some test images of the beautiful edge-on galaxy NGC 891 in Andromeda.
For my sample result based on two hours total data, please see http://www.perseus.gr/Images/dso-ngc-0891-20x6min.jpg and which is based on twenty six-minute subs. I purposely pursued six-min test subs since my master dark library did not have a 10-min master dark for the cooling temperature I was working that particular night.
Please note this result has partial reduction, namely the use of a master dark and nothing else. The full resolution image looks much nicer and with the stars being very nice circles.
There is no question in my mind the M210 is a very good scope for DSO work and in spite of the general concensus to the contrary due to a supposedly non-flat field from edge to edge and its slow f-ratio.
Anthony.