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Beginner considering 6" or 8" Dob
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14-12-2009, 07:16 PM
Robh
(Rob)
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Join Date: Feb 2009
Location: Blue Mountains, Australia
Posts: 1,333
There is significant light gain of the 8 inch over the 6 inch.
8^2=64, 6^2=36.
64/36~1.8 or nearly twice the light gathering ability.
Dimmer objects will be easier to see with the 8 inch, even under skyglow.
Go for the 8 inch!
Regards, Rob.
Robh
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