TS Optics Photon N 203/800 Carbon OTA

Description

Capture faint extended emission nebulae at high photographic speed with the TS Optics Photon N 203/800 Carbon OTA fast parabolic newtonian astrograph optical tube assembly. Operating at a fast f/3.94 focal ratio with an 800mm focal length, this 203mm (7.99 in) aperture instrument delivers a 0.57 arcseconds theoretical resolving power and reaches magnitude 14.2, collecting photons rapidly during mobile deep-sky astrophotography on portable tracking mounts.

The optical system features a fast parabolic primary mirror made from homogeneous fused quartz glass, treated with enhanced dielectric aluminum coatings yielding 94% reflectivity and protected by an SiO2 layer, paired with an oversized 70mm secondary mirror producing a 34.5% central obstruction by diameter (11.9% by area). Built inside a rigid carbon fiber composite tube measuring 730mm in length with a 230mm outer diameter, the assembly supplies 65mm of back focus above the 2-inch visual back, optimized for imaging trains with coma correctors. Supported by a 2-inch Monorail dual-speed linear bearing focuser with 360-degree rotation, this 6.80 kg (14.99 lbs) astrograph illuminates a 44mm full-frame format when paired with optional TS-GPU or MaxField correctors.

Key Features of TS Optics Photon N 203/800 Carbon OTA

Engineered for high-speed mobile astrophotography, this 203mm f/3.94 Newtonian pairs a fused quartz primary mirror with a low-expansion carbon fiber tube to eliminate focal drift. Its oversized secondary mirror, 2-inch rotatable Monorail focuser, primary mirror cooling fan with battery pack, and lightweight 6.80 kg chassis provide a travel-ready astrograph platform.

• 203mm (7.99 in) clear aperture with 800mm focal length and ultra-fast f/3.94 optical speed
• Fused quartz primary mirror substrate paired with a rigid carbon fiber composite tube
• Enhanced dielectric aluminum coatings with 94% reflectivity and protective SiO2 layer
• Oversized 70mm secondary mirror providing full illumination across large camera sensors
• 2-inch Monorail dual-speed linear bearing focuser 1:10 with complete 360-degree rotation
• Standard 65mm back focus above the 2-inch visual back configured for coma correctors
• Corrected 44mm full-frame image circle when paired with optional TS-GPU coma corrector
• Primary mirror 12V cooling fan with battery pack, CNC tube rings, Vixen dovetail, and 8×50 finderscope included

Fast f/3.94 Optical Speed & 70mm Secondary Illumination

The parabolic fused quartz primary mirror exhibits an ultra-low thermal expansion coefficient, maintaining sharp star focus as nocturnal ambient temperatures drop. The oversized 70mm secondary mirror illuminates full-frame sensor formats without vignetting, while an all-reflective optical train supports practical magnifications from 29.0x up to 406x.

Rotatable Monorail Drawtube & Active Battery-Powered Fan

Preventing drawtube flexure under camera loads is achieved through the 2-inch Monorail linear bearing focuser, which includes 360-degree rotation for framing deep-sky targets. An integrated rear 12V cooling fan with an included battery pack accelerates primary mirror thermal equilibrium, while the 6.80 kg carbon fiber tube clamps securely via CNC rings onto portable equatorial mount saddles.

• 2-inch Monorail dual-speed linear bearing focuser with 1:10 fine tuning and full 360-degree rotation
• Integrated primary mirror cooling fan with battery pack to shorten cool-down periods in the field
• Rigid carbon fiber composite tube delivering high structural rigidity with minimal thermal expansion

TS Carbon Fast Astrograph Series Factory Warranty

The TS Optics Photon N 203/800 Carbon OTA is backed by a 2-year limited warranty against material and manufacturing defects. The complete factory package contains the Carbon Fiber 203/800 Astrograph OTA, primary mirror 12V cooling fan with battery pack, CNC tube rings, Vixen dovetail, 2-inch Monorail focuser, 1.25-inch adapter, and an 8×50 finderscope.