TS Optics Photon N 150/900 OTA

Description

Operating at a 900mm focal length with an f/6.0 focal ratio, the TS Optics Photon N 150/900 OTA is a versatile parabolic newtonian reflector telescope optical tube assembly engineered for planetary observing and all-around deep-sky imaging. Featuring a 150mm (5.91 in) aperture, this instrument delivers a 0.77 arcseconds theoretical resolving power and reaches magnitude 13.6, splitting close binary stars and collecting light across distant star clusters.

The optical system features a parabolic primary mirror fabricated from low thermal expansion borosilicate glass, treated with enhanced aluminum coatings yielding 94% reflectivity and protected by a silicon dioxide (SiO2) overcoat, maintaining a moderate 30% central obstruction by diameter (9.0% by area) from its 45mm secondary mirror. Built inside a rolled solid steel tube measuring 810mm in length with a 178mm outer diameter, the tube assembly provides 65mm of back focus above the 2-inch visual back, optimized for APS-C sensors natively and full-frame sensors when paired with optional coma correctors. Fitted with a 2-inch Monorail dual-speed linear bearing focuser, this 5.50 kg (12.13 lbs) telescope covers a native 28mm image circle.

Key Features of TS Optics Photon N 150/900 OTA

Built for visual astronomers and planetary astrophotographers seeking high contrast with reduced coma, this 150mm f/6.0 Newtonian pairs an extended focal length with a dual-speed Monorail focuser. Its rigid steel chassis, CNC-machined split tube rings, and standard Vixen dovetail bar provide mechanical stability on medium-capacity equatorial mounts.

• 150mm (5.91 in) clear aperture with 900mm focal length and balanced f/6.0 optical speed
• Parabolic primary mirror made from low-expansion borosilicate optical glass
• Enhanced aluminum mirror coatings with 94% reflectivity and protective SiO2 overcoat
• Moderate central obstruction of 30% by diameter (9.0% by area) for sharp lunar contrast
• 2-inch Monorail dual-speed linear bearing focuser 1:10 with 1.25-inch adapter
• Generous 65mm back focus above the 2-inch visual back for cameras and coma correctors
• Native 28mm APS-C optimized image circle expandible to full-frame with optional correctors
• CNC tube rings, 44mm Vixen-style dovetail bar, 6×30 finderscope, and 35mm extension tube included

Parabolic Borosilicate Mirror & High-Contrast Baffling

The parabolic primary mirror corrects spherical aberration across an all-reflective optical train, eliminating chromatic fringing on bright targets like Jupiter and the lunar terminator. Borosilicate glass maintains optical surface accuracy during nocturnal temperature variations, supporting high-contrast visual and video magnifications from 21.4x up to 300x.

Monorail Linear Bearing Drive & Visual Extension Hardware

Holding heavy eyepieces and camera setups without drawtube tilt is managed by a 2-inch Monorail focuser utilizing a central stainless steel guide rail with a 1:10 micro-reduction drive. The included 35mm 2-inch extension tube provides instant visual back positioning for visual diagonals and eyepieces, while the 5.50 kg steel tube balances smoothly in CNC rings on standard mount saddles.

• 2-inch Monorail dual-speed linear bearing focuser with 1:10 micro-reduction to prevent drawtube sag
• Rigid rolled steel tube construction delivering dependable optical alignment and collimation hold
• Included 35mm 2-inch extension tube and 6×30 optical finderscope for rapid observing setup

TS-Photon Steel Series Warranty Coverage

The TS Optics Photon N 150/900 OTA is backed by a 2-year limited warranty against material and manufacturing defects. The complete factory package contains the 150/900 Newtonian OTA, CNC tube rings, Vixen dovetail bar, 2-inch Monorail focuser, 1.25-inch adapter, 6×30 optical finderscope, and a 35mm 2-inch extension tube.