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68° Apparent Field Eyepieces
When binned 2x2 the field of view remains 2
HCG (high conversion gain) mode
2" eyepieces
18") Focal Ratio: f/2
Open Box ES Field Flattener For f/5 to f/7 Refractors GoTo 68° Apparent Field EyepiecesPRICE DROP! Was $130, now just $100! Condition: This is an open box return in excellent condition. The outer body is unmarked and the optics are clean. Though, this is missing and does not include the M48 adapter. Otherwise it is practically new and includes the original box. Description: This is a field flattener for refractor type telescopes with a focal ratio of f 5 to f 7 Causes no change to the telescope focal length 2 inch barrel to easily
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