Astrographs

107mm Aperture Quadruplet APO Optical Design 749mm Focal Length at f/7 44mm Corrected Image Circle for Full-Frame Sensors Integrated Field Flatten...

111mm Aperture 766mm Focal Length (f/6.9) Quadruplet Air-Spaced APO Design with ED Glass 44mm Corrected Image Circle Integrated Field Flattener Ne...

130mm Aperture Quadruplet APO Optics 1000mm Focal Length at f/7.7 Built-in Field Flattener 60mm Corrected Image Circle Total Assembled Weight of 1...

131mm Aperture 983mm Focal Length (f/7.5) Quadruplet Air-Spaced APO Optical Design Includes One ED Glass Element 44mm Full-Frame Image Circle Inte...

151mm Aperture Quadruplet APO Optics 1057mm Focal Length at f/7 Integrated Flattener for a 60mm Image Circle Includes 2 ED Glass Elements for Colo...

50mm Aperture Quadruplet APO Optics Ultra-Fast f/3.8 Focal Ratio 190mm Focal Length Natively Flat Field for APS-C Sensors Standard 55mm Back Focus...

60mm Aperture Quadruplet APO Optics 408mm Focal Length (f/6.8) 44mm Full-Frame Corrected Image Circle Integrated Field Flattener 2.4-inch Dual-Spe...

65mm Aperture Quintuplet APO Optical Design 416mm Focal Length at f/6.4 Built-in Field Flattener with a 44mm Image Circle 2.8kg Total Weight Inclu...

71mm Aperture Quadruplet Air-Spaced APO 490mm Focal Length at f/6.9 44mm Full-Frame Corrected Image Circle Integrated Field Flattener Design 2.4-i...

80mm Aperture 600mm Focal Length (f/7.5) Quadruplet APO Optics with 2 ED Elements 44mm Full-Frame Corrected Image Circle 3.9kg Optical Tube Weight...

91mm Aperture Quadruplet APO Optics 609mm Focal Length at f/6.7 44mm Full-Frame Corrected Image Circle Integrated Field Flattener Design 3.92kg Ne...

60mm Quintuplet APO Astrograph 300mm Focal Length at a Fast f/5 Focal Ratio 44mm Full-Frame Corrected Image Circle Integrated Petzval Corrector De...

72mm Aperture Quintuplet APO Lens 400mm Focal Length at f/5.6 44mm Natively Flat Image Circle 140mm Available Back Focus from M68x1 Thread 3" Rack...

72mm Aperture Quintuplet APO Optics 400mm Focal Length at f/5.6 Covers a 44mm Full-Frame Image Circle Integrated 17-Blade Aperture (f/5.6-f/22) 2....

90mm Aperture Quintuplet APO Optics 500mm Focal Length at f/5.6 Massive 55mm Natively Flat Image Circle Includes Two ED Glass Elements Total Assem...

108mm Aperture 600mm Focal Length (f/5.6) Quintuplet Flat-Field APO Optical Design 66mm Corrected Image Circle 6.5kg Total Weight (including tube ...

160mm Aperture Parabolic Mirror f/3.4 Corrected Focal Ratio with Included 0.95x Corrector 544mm Corrected Focal Length Carbon Fiber Tube Construct...

106mm Aperture f/4.8 Focal Ratio 509mm Focal Length Quintuplet Petzval APO Optical Design with 2x SD Glass 55mm Corrected Image Circle for Medium ...

130mm Aperture Quintuplet Petzval APO Optics 624mm Focal Length at a Fast f/4.8 Focal Ratio 55mm Corrected Image Circle for Medium Format Sensors ...

55mm Aperture Quintuplet APO Astrograph Fast f/4.8 Focal Ratio & 264mm Focal Length Covers a 44mm Full-Frame Image Circle 14-Blade Aperture wi...

60mm Aperture Sextuplet APO Optics 276mm Focal Length at a Fast f/4.6 44mm Full-Frame Corrected Image Circle Integrated Petzval Design with 2 SD G...

70mm Aperture 336mm Focal Length (f/4.8) Quintuplet Air-Spaced Petzval APO Optical Design Contains 2 ED Glass Elements 44mm Full-Frame Corrected I...

85mm Aperture 408mm Focal Length (f/4.8) Quintuplet Petzval APO Optical Design Corrects a Full-Frame (44mm) Image Circle 3.64kg Optical Tube Assem...

Modular design with interchangeable 60mm and 80mm triplet APO objectives V60 Configuration: 60mm aperture, 360mm focal length, f/6 focal ratio Tri...