Omegon Pro RC 203/1624 Ritchey-Chretien OTA

Description

Near-zero expansion quartz mirror substrates power the Omegon Pro RC 203/1624 Ritchey-Chretien OTA coma-free reflector optical tube assembly. Designed in Germany, this f/8 telescope features an 8-inch, 203mm (7.99 inches) aperture and a 1624mm focal length, attaining 0.57 arcsecond Dawes resolving power and reaching magnitude 13.3 for high-resolution deep-space astrophotography.

The Omegon Pro RC 203/1624 Ritchey-Chretien OTA incorporates hyperbolic primary and secondary mirrors coated with 94% enhanced reflective multi-layer aluminum. Its roll-formed heavy-gauge steel cylinder shell contains internal anti-reflection stray light baffles and direct collimation retention screws. Equipped with a 2-inch linear guide Crayford focuser and top and bottom dovetail rails, the 7.50 kg (16.53 lbs) assembly mounts rigidly to standard astronomical saddles.

Key Features of Omegon Pro RC 203/1624 Ritchey-Chretien OTA

Built for mid-aperture deep-sky astrophotography, this 8-inch Omegon Pro Ritchey-Chrétien OTA pairs zero-expansion quartz mirrors with a linear guide focuser. Its true aplanatic optical design eliminates off-axis coma and spherical aberrations, delivering edge-to-edge flat fields without external corrector lenses.

• 203mm (7.99 inches) aperture with 1624mm focal length and versatile f/8 optical speed
• True Ritchey-Chrétien optical design with dual hyperbolic quartz mirrors
• Enhanced multi-layer aluminum optical coatings achieving 94% enhanced reflectivity
• 95mm planar secondary mirror obstruction (46.80% diameter, 21.90% area)
• 2-inch dual-speed Crayford focuser with linear guide rail and 1:10 micro-reduction
• Fixed primary mirror cell layout eliminating image shift during focus adjustments
• Dual Vixen and Losmandy-style dovetail rails mounted on top and bottom tube walls
• Three threaded extension tubes (two 25mm, one 50mm) included for backfocus spacing

Aplanatic Ritchey-Chrétien Optical Design

The dual hyperbolic mirror configuration delivers a wide, coma-free focal plane across camera sensors. With pure mirror reflections that prevent chromatic dispersion, this Omegon Pro RC OTA supports useful visual and imaging magnifications from 29x up to 406x.

2-Inch Linear Guide Focuser & Dual Dovetail Mounting

Preventing sensor tilt during long exposures requires a rigid focusing platform. The Omegon Pro RC 203/1624 OTA features a 2-inch Crayford focuser reinforced with a linear guide track to eliminate drawtube flexure. Its pre-installed top and bottom dovetail rails allow simultaneous mount attachment and guide scope mounting.

• 2-inch linear guide Crayford focuser with smooth 1:10 planetary gear reduction
• Top and bottom Vixen and Losmandy dovetail bars for versatile equipment mounting
• Three extension tubes included for customized camera and accessory backfocus

Omegon Pro RC 203/1624 Warranty

The Omegon Pro RC 203/1624 Ritchey-Chretien OTA is backed by a 2-year limited warranty against material and manufacturing defects. The complete factory package contains the 203mm RC optical tube assembly, Losmandy dovetail bar, Vixen dovetail bar, 2-inch linear guide focuser, two 25mm focuser extension tubes, and one 50mm focuser extension tube.