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Ships within 48 hours · Estimated delivery Jul 27 - Aug 1
The item is free shipping in US mainland only
Because of the very low thermal expansion in quartz glass
ALT : nema23 ( driver set 2
The 2x Barlow apply 2" huge ED (Extra-Low Dispersion) lens to eliminate chromatic aberration
GSO RC 0.75x Reducer The item is free shipping1. 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
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