astro.n-minus

OTA

GSO 10" F/12 Classic Cassegrain

Key specifications

Aperture250 mm
Focal length3000 mm
Focal ratiof/12
Optical designOther
Back focus300 mm

All specifications

Focuser type3" dual-speed Linear Bearing Crayford
DovetailLosmandy

About

A 250 mm f/12 classic Cassegrain with hyperbolic and parabolic low-expansion quartz mirrors, a 3" dual-speed linear-bearing Crayford focuser and three built-in cooling fans, aimed at lunar and planetary imaging.