Orion CT12L 300/1590 Carbon Newtonian OTA

Description

Planetary observers seeking maximum image definition without large secondary diffraction effects rely on the Orion CT12L 300/1590 Carbon Newtonian OTA precision reflector optical tube assembly. Designed and manufactured in the United Kingdom by Orion Optics UK, this f/5.3 telescope features a 300mm (11.81 inches) aperture and a 1590mm focal length, delivering 0.39 arcsecond Dawes resolving power and reaching magnitude 14.2.

The Orion CT12L 300/1590 Carbon Newtonian OTA features a precision-annealed Suprax parabolic primary mirror verified by a 1/10 PV surface test report and coated with 97% reflective Hilux multi-layer coatings. Its structural twill carbon fiber shell includes matte internal anti-reflective coating, a CNC 9-point cell with micro-adjusting collimation bolts, and a 2-inch dual-speed Octoplus Crayford focuser. Weighing 17.00 kg (37.48 lbs), this 12-inch long-focus reflector holds critical optical collimation under fluctuating temperatures.

Key Features of Orion CT12L 300/1590 Carbon Newtonian OTA

Built for high-resolution planetary target screening and small deep-sky object imaging, this 12-inch Orion Optics UK Newtonian OTA combines an elongated f/5.3 focal ratio with a small 21% central obstruction. Its certified 1/10 PV optics and carbon chassis optimize visual definition without corrector lenses.

• 300mm (11.81 inches) aperture with 1590mm focal length and versatile f/5.3 optical speed
• Precision-annealed Suprax primary mirror with certified 1/10 PV wavefront accuracy
• Hilux multi-layer reflective coatings delivering 97% total optical reflectivity
• Minimal 63mm secondary mirror obstruction (21.00% diameter, 4.41% area)
• 2-inch dual-speed Octoplus Crayford focuser with 10:1 planetary micro-gear reduction
• Genuine multi-layer twill carbon fiber structural shell with matte internal coating
• CNC-machined 9-point primary cell featuring micro-adjusting collimation bolts
• Heavy Losmandy-style mounting rail paired with CNC-machined aluminum support rings

Long-Focus 1/10 PV Suprax Parabolic Optics & Low Obstruction

The elongated 1590mm focal length limits secondary mirror obstruction to only 21.00% by diameter, maximizing fine-detail contrast on planetary surfaces and globular clusters. Protected by 97% Hilux coatings, this long-focus Orion OTA supports magnifications from 43x up to 600x.

2-Inch Octoplus Crayford Focuser & Carbon Fiber Structure

High-magnification planetary tracking requires smooth focusing mechanics and rigid optical tube construction. The Orion CT12L features a 2-inch Octoplus Crayford focuser with 10:1 planetary reduction for fine focus adjustments. Its low-expansion carbon fiber shell eliminates temperature-induced focus shifts, maintaining peak resolution throughout extended visual and planetary imaging sessions.

• 2-inch dual-speed Octoplus Crayford focuser with 10:1 precision planetary gear drive
• Genuine twill carbon fiber tube shell designed to eliminate thermal focal expansion
• CNC aluminum support ring set fastened to a heavy Losmandy-style dovetail bar

Orion Optics UK CT12L Warranty

The Orion CT12L 300/1590 Carbon Newtonian OTA is manufactured in the United Kingdom and backed by a 1-year limited warranty. The complete shipment package contains the 300mm Suprax Newtonian OTA, CNC tube rings, heavy Losmandy-style mounting rail, 2-inch Octoplus focuser, and 1/10 PV wavefront surface test report.