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ALT : nema23 ( driver set 2
This 2" eyepiece features a M57 male thread when unscrewing a threaded eyepiece cap
its convenient operation could be applied for both entry level astronomy and birds watching etc
The 2x Barlow apply 2" huge ED (Extra-Low Dispersion) lens to eliminate chromatic aberration
The item is 100% made in Taiwan
GSO RC 0.75x Reducer ALT : nema23 ( driver1. GSO 0. 75x focal reducer is designed only for Ritchey Chretien telescopes 2. Reducer is 2 4 elements fully coated lens, provide a wider field of view and larger aperture for astrophotography 3. The special camera adapter and 2 eyepiece adapter are included. 4. The GSO 0. 75x focal reducer provides about 80mm back focus. Please follow the instruction to derive best performance. 5. Free shipping in US mainland