GSO RC 406/3250 Truss Carbon OTA (16")
7,150.00
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GSO RC 406/3250 Truss Carbon OTA (16")
16" RC carbon astrograph with quartz optics and precision 4" focuser. Ideal for full-frame astrophotography with premium equatorial mounts.
GSO RC 406/3250 Truss Carbon OTA (16")
Overview
The GSO RC 406/3250 Truss Carbon OTA is a professional-grade 16" Ritchey-Chrétien astrograph designed for observatories and high-end astrophotography. Its quartz optics with dielectric coatings offer 99% reflectivity, delivering a wide coma-free field ideal for full-frame sensors.
The carbon truss structure provides both thermal and mechanical stability, critical for long exposure sessions.
Technical specifications
Optical design: Ritchey-Chrétien (hyperbolic mirrors)
Aperture: 406 mm
Focal length: 3250 mm
F-ratio: f/8
Primary mirror: quartz, dielectric coating 99%
Secondary mirror: quartz, diameter 191 mm
Central obstruction: ~47%
Backfocus: ~233 mm from rear flange
Structure: carbon truss, CNC aluminum end rings
Tube weight: ~37 kg
Focuser: 4" Monorail with 1:10 fine focus, 2" and 1.25" adapters
Included:
Extension rings
Losmandy rails
Dust covers
Optical performance
Fully corrected field for sensors up to 60 mm
Free of coma and spherical aberration
Suitable for:
Planetary nebulae and galaxies
Long focal length deep sky imaging
Scientific photometry or spectroscopy
Mount compatibility
Due to its size and mass, this OTA requires a stable mount:
iOptron mounts:
CEM120 / EC / EC2 – ideal observatory solution
10Micron mounts:
GM2000 HPS II Combi – high precision, perfect for imaging
GM3000 HPS – suitable for heavier setups or dual OTAs
Highlights
Ritchey-Chrétien optics with flat coma-free field
Carbon truss design for maximum rigidity and thermal stability
Large 4" focuser supports heavy image trains
Built for full-frame sensors and advanced imaging workflows
Ideal for serious amateurs and professional observatories
GSO RC 406/3250 Truss Carbone
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GSO RC 406/3250 Truss Carbon OTA (16")
16" RC carbon astrograph with quartz optics and precision 4" focuser. Ideal for full-frame astrophotography with premium equatorial mounts.