Orion ODK12 300/2040 Dall-Kirkham OTA

Description

Large-format CCD imagers seeking coma-free, flat-field star profiles across extended focal lengths rely on the Orion ODK12 300/2040 Dall-Kirkham OTA carbon fiber astrograph optical tube assembly. Designed and manufactured in the United Kingdom by Orion Optics UK, this f/6.8 telescope features a 300mm (11.81 inches) aperture and a 2040mm focal length, delivering 0.39 arcsecond Dawes resolving power and reaching magnitude 14.2.

The Orion ODK12 300/2040 Dall-Kirkham OTA incorporates an elliptical Suprax primary mirror, spherical secondary mirror, and an integrated doublet field corrector lens with 97% reflective Hilux multi-layer coatings. Its structural twill carbon fiber shell features matte internal anti-reflective coating, fixed mechanical mirror retainers, and a 3-inch dual-speed rack and pinion focuser with a 10:1 micro-drive. Weighing 16.00 kg (35.27 lbs), it maintains tight stellar geometries over long exposure loops.

Key Features of Orion ODK12 300/2040 Dall-Kirkham OTA

Built for high-speed large-format CCD astrophotography, this 12-inch Orion Optics UK ODK astrograph pairs an Optimized Dall-Kirkham optical core with an integrated doublet corrector. Its rigid carbon fiber chassis and 3-inch focuser sustain tight stellar cross-sections across wide full-frame sensor formats.

• 300mm (11.81 inches) aperture with 2040mm focal length and versatile f/6.8 optical speed
• Optimized Dall-Kirkham optical design with elliptical primary and spherical secondary
• Integrated doublet field corrector lens for edge-to-edge flat-field astrophotography
• Hilux multi-layer reflective coatings delivering 97% total optical reflectivity
• 114mm secondary mirror obstruction (38.00% diameter, 14.44% area)
• 3-inch dual-speed rack and pinion focuser with 10:1 micro-drive and rigid lock
• Genuine multi-layer twill carbon fiber structural shell with matte internal coating
• CNC-machined primary cell with fixed mechanical retainers to prevent mirror shift

12-Inch Optimized Dall-Kirkham Optics & Doublet Corrector

The elliptical primary and spherical secondary work with the built-in doublet corrector to deliver an expansive, flat focal surface free of off-axis aberrations. With 97% Hilux coatings, this 12-inch Orion ODK astrograph supports useful magnifications from 43x up to 600x.

3-Inch Dual-Speed Focuser & Carbon Fiber Structure

Observatory astrophotography requires unyielding drawtube mechanics and thermal stability. The Orion ODK12 features a 3-inch dual-speed rack and pinion focuser with a 10:1 micro-reduction drive that prevents camera tilt. Its low-expansion carbon fiber shell eliminates temperature-induced focus shifts, maintaining peak resolution throughout extended deep-sky imaging sessions.

• 3-inch heavy-duty dual-speed rack and pinion focuser with positive mechanical lock
• Twill carbon fiber tube shell engineered to prevent thermal focus expansion
• CNC-machined aluminum support rings mounted to a heavy Losmandy dovetail plate

Orion Optics UK ODK12 Warranty

The Orion ODK12 300/2040 Dall-Kirkham OTA is manufactured in the United Kingdom and backed by a 1-year limited warranty. The complete factory package contains the 300mm Suprax ODK optical tube assembly, integrated doublet field corrector lens, 3-inch dual-speed focuser, CNC tube rings, Losmandy dovetail rail, and wavefront test report.