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A 10" f/5 with a 1250-1270mm focal length?
A set of eyepieces could be (to cover nearly all the bases you'll have in the next couple years:
50x, for low power views of large objects and for the largest nebulae with a nebula filter.
100x for most deep sky objects and the moon at low power.
150x for smaller DSOs and the Moon, and for planets at low power.
200x for small DSOs like planetary nebulae, the planets, the Moon, double stars.
250x for the same objects as 200x only in better Seeing.
By math, that means focal lengths of: 24-25mm, 12-13mm, 8-9mm, 6-6.5mm, 4.7-5mm
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