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Thomas_N
member
Reged: 07/07/08
Posts: 25
Loc: Germany, Bavarian Forest
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Re: Favorite DS mag?
07/21/08 01:52 PM
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Well, this is very interesting. But how do you observe M13 for example? According to your rule you need 15x (since M13 has appr. 1/3° Diameter). On a 10" F/5 scope the minimal mag. is ~ 30-40x giving more than 10 degrees. I find even that a little small in order to resolve the cluster. It doesn't hurt to magnify a lot more in my opinion. Of course with planetaries, 5° can be quite a lot...
Thomas
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