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While back i was seeking advice for a EL Supremo eyepiece for my 10" SCT , thinking that the longest focal length would be the go i was surprised to see the common take was to put the money on a eyepiece double the focal ratio of your scope that being around 20mm for my F10 scope . Decided to go the 22mm nagler which gives me 113x , great for general viewing , i add a focal reducer to go low and a 2x powermate to bump over 200x for the planets/moon , with this eyepiece and the 2 accessories i cover a nice range of around 70x/113/140/226 ...perfect IMO .
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