GSO RC 355/2845 Truss Carbon OTA
5,799.00
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GSO RC 355/2845 Truss Carbon OTA
355 mm f/8 RC carbon truss OTA with 99% quartz optics and 3" focuser. Built for full-frame deep sky imaging on high-end mounts like iOptron and 10Micron.
GSO RC 355/2845 Truss Carbon OTA
Overview
The GSO RC 355/2845 Truss Carbon OTA is a professional-grade astrograph designed for permanent observatory installations. With its Ritchey-Chrétien optics and 99% reflective quartz mirrors, it provides a wide coma-free field with perfect flatness for large-format imaging sensors.
Its carbon truss structure ensures excellent thermal equilibrium and mechanical rigidity. The heavy-duty 3" focuser supports advanced imaging gear and long optical trains.
Technical specifications
Optical type: Ritchey-Chrétien, hyperbolic mirrors
Aperture: 355 mm
Focal length: 2845 mm
F-ratio: f/8
Mirrors: Quartz, 99% dielectric coating
Central obstruction: 41%
Backfocus: 233 mm from rear flange
Structure: Carbon truss with CNC-machined aluminum
Weight: approx. 30 kg
Focuser: 3" Crayford with 1:10 micro-reduction, 2" and 1.25" adapters
Included:
Top and bottom Losmandy rails
Extension rings
Mirror and focuser dust caps
Optical performance
Flat field without coma or spherical aberration
Full-frame sensor coverage (up to 60 mm diagonal)
Designed for:
Planetary nebulae
Galaxy clusters
Scientific spectroscopy or photometry
Mount compatibility
Due to its weight and precision optics, this OTA is ideal for:
iOptron mounts:
CEM120 / CEM120EC – 52 kg payload for observatory-grade setups
10Micron mounts:
GM2000 HPS II Combi – high-end tracking and encoder integration
GM3000 HPS – 100 kg capacity for multi-instrument configurations
Key advantages
Professional RC system for coma-free wide field
Quartz mirrors with high thermal and optical stability
Heavy-duty focuser supports full-frame imaging setups
Modular design, perfect for observatory integration
Ideal pairing with high-end harmonic or encoder-based mounts
GSO RC 355/2845 Truss Carbone
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GSO RC 355/2845 Truss Carbon OTA
355 mm f/8 RC carbon truss OTA with 99% quartz optics and 3" focuser. Built for full-frame deep sky imaging on high-end mounts like iOptron and 10Micron.