GSO 10" f/12 Classical Cassegrain Reflector Telescope - Truss Tube OTA
3,029.00
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10 inch F12 classic cassegrain optical tube
10 inch F12 classic quartz Cassegrain with 3000 mm focal length, 3 inch Crayford focuser, ideal for planetary imaging.
10 inch F12 classic cassegrain optical tube
DESCRIPTION
The 10 inch F12 classic Cassegrain OTA features a 250 mm aperture and 3000 mm focal length, designed for lunar, planetary imaging and visual observation. Its optical system uses a hyperbolic primary and parabolic secondary mirror made of low thermal expansion quartz, ensuring excellent thermal stability and precise optics.
It includes a 3 inch linear bearing Crayford focuser with dual-speed, fully ready for electronic autofocusing (EAF). The long back working distance of 300 mm provides great flexibility for astro imaging accessories. A multi knife-edge baffle system inside reduces internal stray light and enhances contrast.
The secondary mirror obstruction is limited to 33 percent, improving brightness and contrast compared to Schmidt-Cassegrain scopes. Its pure reflective design ensures no chromatic aberration. With 99 percent mirror reflectivity, the image is bright and sharp across the field. Field flatness is maintained up to APS-C sensor size, without need for a field corrector.
The carbon fiber and aluminum construction offers excellent rigidity with low weight, and the compact design allows transport in a small vehicle or on a passenger seat. It includes three built-in cooling fans with battery holder, a 1.25 inch adapter, two 25 mm extension tubes, and one 50 mm extension tube.
TECHNICAL SPECIFICATIONS
Optical design: Cassegrain
Optical diameter: 250 mm
Focal length: 3000 mm
Focal ratio: F12
Mirror type: hyperbolic and parabolic
Mirror material: low expansion quartz
Focuser: 3 inch linear bearing Crayford, EAF complete
Mirror separation: 540 mm
Back working distance: 300 mm
Imaging application: lunar and planetary
Dovetail plate: D type
Tube material: aluminum and carbon fiber
Baffle: multiple knife edge baffle system
Secondary obstruction: 33 percent
Mirror reflectivity: 99 percent
Cooling: 3 built-in fans with battery holder
Included accessories: 1.25 inch adapter, 2x 25 mm and 1x 50 mm extension tubes
- weight 16.4 kg
Cassegrain GSO 250mm
10 inch F12 classic cassegrain optical tube
10 inch F12 classic quartz Cassegrain with 3000 mm focal length, 3 inch Crayford focuser, ideal for planetary imaging.