Ritchey-Chrétien & Dall-Kirkham Telescopes

200mm (8") Ritchey-Chretien Optical Design 1624mm Focal Length at f/8 Coma-Free Optics for Flat-Field Astrophotography 2" 10:1 Dual-Speed Crayford...

150mm (6") Ritchey-Chretien Optical Design 1370mm Focal Length f/9 Focal Ratio 10:1 Dual-Speed 2" Crayford Focuser 12 lbs Tube Weight Descripti...

260mm (10.2") Aperture Aspherical Primary Mirror 1300mm Focal Length at a fast f/5 Focal Ratio Massive 80mm Corrected Image Circle for Large Forma...

14" (355mm) Ritchey-Chretien Optical Design 2848mm Focal Length at f/8 Carbon Fiber Truss Tube for Thermal Stability Heavy-duty 3" Dual-Speed 10:1...

310mm Aperture Aspherical Primary Mirror 1178mm Focal Length at a Fast f/3.8 55mm Corrected Image Circle for Medium Format Sensors Triplet Correct...

Optimized Dall-Kirkham (ODK) Optical Design Corrected, Coma-Free Flat Field for Imaging Open Truss Tube for Thermal Stability and Rigidity Hand-Fi...

500mm truss-tube Dall-Kirkham f/6.8 carbon-fibre-sandwich optics Open truss for shorter packed length Built to order in the UK Description Spec...

Optimized Dall-Kirkham (ODK) Optical Design Open Truss Tube Framework Primary and Secondary Mirrors by Orion Optics UK Engineered for Astrophotogr...

400mm (16") Optimized Dall-Kirkham Optics 2720mm Focal Length (f/6.8) >52mm Fully Corrected and Illuminated Image Circle 2.4µm On-Axis Spot Siz...

350mm (14") Optimized Dall-Kirkham Optics 2380mm Focal Length (f/6.8) >52mm Fully Illuminated and Corrected Image Circle 2.1µm On-Axis Spot Siz...

300mm (12") Optimized Dall-Kirkham Astrograph 2040mm Focal Length (f/6.8) >52mm Flat, Corrected Image Circle 1.8µm On-Axis Spot Size Carbon Fib...

250mm (10-inch) Optimized Dall-Kirkham optics 1700mm focal length at a native f/6.8 focal ratio 50mm fully corrected, flat image circle for large ...

400mm (16") Primary Mirror Diameter 2720mm Focal Length at f/6.8 Corrected Dall-Kirkham Optical Design >52mm Flat Field Image Circle Carbon Fib...

Primary Mirror Diameter: 350mm Focal Ratio: f/6.8 Corrected Image Circle: >52mm Tube Material: Carbon Fibre Sandwich Back Focus: 210mm Tu...

300mm (12") Optimised Dall-Kirkham Optics 2040mm Focal Length at a fast f/6.8 Focal Ratio Covers a greater than 52mm flat imaging circle Delivers ...

250mm (10") Corrected Dall-Kirkham Optics 1700mm Focal Length at f/6.8 50mm Fully Corrected Flat Image Circle 3.5μm On-Axis Spot Size Carbon Fibre...

250mm (10-inch) Ritchey-Chrétien Optical Design 2000mm Focal Length at f/8 0.46 arc second Resolving Power 3-inch Dual Speed Focuser 35 lb Steel T...

16" (406mm) Aperture 3248mm Focal Length f/8 Focal Ratio Ritchey-Chretien Optical Design Carbon Fiber Truss Tube 3" 10:1 Dual-Speed Focuser Des...

12" (304mm) Ritchey-Chretien Optics 2432mm Focal Length f/8 Focal Ratio Carbon Fiber Truss Tube Design 3" Dual-Speed 10:1 Crayford Focuser 53 lb O...

10" (254mm) Ritchey-Chretien Optical Design 2032mm Focal Length f/8 Focal Ratio Carbon Fiber Truss Tube for Thermal Stability 3-inch, 10:1 Dual-Sp...