GSO 10" f/12 Classical Cassegrain Reflector Telescope - Truss Tube OTA

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