ASTROSIB 10" RITCHEY-CHRETIEN

Ritchey-Chretien telescopes made by Astrosib are the instrument of choice of those who want to do professional astrophotography. The optical and mechanical quality are top notch. The scopes feature hand figured optics, quality control of each optical component and of the complete system, fully adjustable primary and secondary mirrors, fully baffled alluminium alloy tube, cooling system consisting of three fans mounted on the back and large linear field allowing the use of medium format film and large CCD chips.

RC-250 is a fine choice for amateurs looking seriously at astrophotography. The scope is equipped with illuminated 13x80 finder, a mounting platform that allows attaching of the tube to any mount and off-axis guider accepting 1.25" eyepieces or CCD autoguider.

Technical Specifications:

Primary Mirror Diameter: 250mm
Primary Focal Ratio: f/3
Secondary Mirror Diameter: 97 mm
Equivalent Focal Ratio: f/8
Equivalent Focal Length: 2000mm
Primary to Secondary Spacing: 466mm
Tube Length: 615mm
Tube Weight: 15kg
Focuser: Helical; Crayford on request; No focuser on request
Back Focus (from primary mirror surface): 290mm
Mirrors Material: LK-7; AstroSitall mirrors on request
Optical Quality: better than 1/4 PTV, 1/25 RMS, Strehl 0.95

Price: 5999 €