GSO 6'' RC Telescope

6'' F/9 Ritchey Chretien Telescope Ritchey Chretien (RC) Telescope Are Leading Astrophotography Class Telescope. RC Are The Main Telescope In Most Of The Large Observatory And Even Hubble Space Telescope RC Telescope Provides An Exceptionally Flat Field And Coma Free Image - Allowing Pin Point Stars All Across The Image. Most Newtonian And Cassegrain Suffers From Coma Where Image Is Sharp At Center And Become Bloated At Corner. RC Telescope Eliminates This Completely RC Telescope Design Was Previously Not Affordable By Amature Astronomer. With New Manufacturing Technique, Previous Scope Costing Hundreds Of Thousands Now In Reach Of Budget Astronomer. Quality Are No Compromised. These RC Features A Solid Tube Construction, 2'' Dual Speed Focuser And A Multi-Layered Internal Baffle. These RC Provide Excellent Imaging Platform And Also Good Enough For Visual. Available In Size 6'' To 20'' RC (15cm-51cm) Features 99% Reflectivity Dieletric Coated Aluminium Precision Dual Speed Focuser High Quality Internal Baffle Ritchey Chretien Optical Design Provides Very Flat Field And Coma Free Image. These Provide Excellent Round Stars Up To 38mm Diagonal At All Corner Of Image. Most Advance Observatory, Includes Palomar, Hubble Space Telescope And Very Large Telescopes Uses Ritchey Chretien Optical Design Specifications 6'' (150mm) F/9 Ritchey Chretien Optical Telescope F/9 Focal Ratio 1370mm Focal Length 12.3lbs Weigth Single V-Vixen Dovetail Plate Central Obstruction : 71mm (22% By Area) Internal Baffled Dual Speed 1:10 Precision Focuser Included Items 6'' F/9 Ritchey Chretien Telescope 2'' Dual Speed 1:10 Microfocuser 1X 50mm Spacer 2X 25mm Spacer Vixen Dovetail Plate Dust Cover Mini Dovetail Adapter