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Originally Posted by ballaratdragons
Normally the 6.5mm in an f5 (the GS 12" is an f5) is pretty useless and you are pushing the limit at around 9mm.
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The 10" f5 will handle shorter focal length eyepieces than the 12" f5 by virtue of the shorter focal length of the scope itself. I'd say you'd use a 6.5mm more often in the 10". I certainly use the 7mm or a barlowed 12mm (which is like a 5.5mm) quite often in my 8" (1200mm focal length, close to the 1250mm of the 10"). Ah, numbers, numbers, numbers. It matters not, Neo. You will have your own preferences different from ours...
