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Old 13-11-2015, 09:31 PM
AG Hybrid (Adrian)
A Friendly Nyctophiliac

AG Hybrid is offline
Join Date: Nov 2009
Location: Toongabbie, NSW
Posts: 1,501
Hey Alex. I find it interesting that the back ground color of the 47 tuc pictures is different. The first picture is clearly brighter in all aspects including the sky glow. Am I correct in the assumption that the reason this is the case is due to the focal length used in the first scope was F4 and the second F10? If someone was wanting to do VA to beat the light pollution some what. Longer focal length is better?
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