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Coma Star Cluster and Big Dipper at 1.6x

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#1 TenthEnemy


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Posted 26 May 2011 - 12:10 AM

A few days ago I took apart a cheap 20mm eyepiece and stuck the lens in a cheap finder bracket. In no time I ended up with an 8mm F/5 refractor, and tonight was its first light.

The telescope can be used up to around 6x power, and can just show M13 under my light-polluted sky. Where it really shines, however, is in widefield views. At 1.6 power it shows more stars than the naked eye, and has a ~27 degree field of view.

I started by observing the Coma Star cluster. I was surprised that stars actually came to sharp focus as the fuzzy blob of the naked eye cluster became a wedge of stars shimmering in their background glow through the telescope. Please excuse some poor star placements, I was holding the scope in one hand while sketching with the other.

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#2 TenthEnemy


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Posted 26 May 2011 - 12:13 AM

The field of view is large enough to fit the entire Big Dipper, and that's with only a 50 degree Apparent FOV.

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#3 frank5817



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Posted 26 May 2011 - 09:50 AM


Very nice sketches. Always fun to see what you can pick out using very small aperture that is larger than your dialated pupil.

Frank :)

#4 niteskystargazer



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Posted 26 May 2011 - 10:28 AM


Nice sketch of Coma Cluster and The Big Dipper :).




#5 Special Ed

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Posted 26 May 2011 - 11:25 AM


Nice work--wide field views are great!

#6 Jef De Wit

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Posted 27 May 2011 - 10:42 AM

Original idea with a nice result!

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