GSO Newtonian 254/1016 with Monorail Focuser

GSO Newtonian 254/1016 with Monorail Focuser – Ref. GS-2541016MR

Description:
The GSO 254/1016 Newtonian Monorail is a fast f/4 imaging telescope designed for amateur astronomers seeking a powerful and precise OTA for astrophotography and visual use. The 254 mm BK7 parabolic primary mirror, with a 1016 mm focal length, delivers a wide, bright field of view perfect for large nebulae and galaxies.

The optical surfaces are enhanced with 94% high-reflectivity coatings and a durable SiO₂ protective layer. The oversized secondary mirror provides full illumination for APS-C and some larger sensors.

The robust 2" Monorail Crayford focuser slides along a steel rail for superior stability under load. The 1:10 microfocusing knob ensures accurate focusing when using imaging equipment like cameras, filter wheels, and coma correctors.

The metal tube is mounted using two tube rings and a Vixen-style dovetail. It includes a finder base and is compatible with guiding accessories.

Technical specifications:

• Optical design: Newtonian reflector

• Aperture: 254 mm

• Focal length: 1016 mm (f/4)

• Primary mirror: BK7 parabolic, 94% reflectivity, SiO₂ coating

• Secondary mirror: 63 mm (~25% central obstruction)

• Focuser: 2" Monorail Crayford with 1:10 microfocuser

• Adapter: 2" to 1.25" included

• Tube: steel, length ~1120 mm

• Weight: approx. 12.5 kg

• Mounting: rings + Vixen-style dovetail

• Included accessories: rings, dovetail bar, adapter

Additional information:
Its f/4 focal ratio makes this OTA very bright and ideal for deep-sky imaging. A coma corrector is recommended for optimal image quality. Suitable for equatorial or harmonic drive mounts with a ≥15 kg imaging payload. A solid foundation for advanced astrophotography setups.