Omegon ProNewton N 203/1000 OTA

Description

Astronomers seeking a large light-gathering aperture that remains perfectly focused across cold temperature drops rely on the Omegon ProNewton N 203/1000 OTA parabolic reflector optical tube assembly. Designed in Germany, this 8-inch f/4.9 telescope features a 203mm (7.99 inches) aperture and a 1000mm focal length, attaining 0.57 arcsecond Dawes resolving power and reaching magnitude 13.3.

The Omegon ProNewton N 203/1000 OTA utilizes an 8-inch parabolic primary mirror crafted from premium quartz with near-zero thermal expansion and 94% enhanced reflective multi-layer aluminum coatings. Its roll-formed heavy-gauge steel cylinder shell features cast aluminum cell end rings, active collimation lock bolts, and a 2-inch dual-speed Crayford focuser with 1:10 micro-reduction. Weighing 8.90 kg (19.62 lbs) with 235mm by 940mm dimensions, this optical tube assembly mounts onto Vixen-style saddles.

Key Features of Omegon ProNewton N 203/1000 OTA

Engineered for general-purpose deep-sky imaging and high-resolution visual observing, this 8-inch Omegon ProNewton reflector OTA pairs a quartz parabolic mirror with a 2-inch Crayford focuser. Its fast f/4.9 optical speed captures faint nebular details while maintaining thermal stability under dark skies.

• 203mm (7.99 inches) aperture with 1000mm focal length and fast f/4.9 optical speed
• Premium quartz primary mirror substrate with near-zero thermal expansion index
• Enhanced multi-layer aluminum optical coatings achieving 94% enhanced reflectivity
• 50mm planar secondary mirror obstruction (24.63% diameter, 6.07% area)
• 2-inch Crayford precision friction drive focuser with 1:10 micro-focus reduction
• Roll-formed heavy-gauge steel tube with cast aluminum cell framework end rings
• Active main base collimation lock bolts and spring-loaded primary mirror cell
• CNC-machined tube ring set and pre-mounted Vixen-style dovetail mounting bar included

8-Inch Quartz Parabolic Mirror Optics & Low Expansion

The 203mm quartz parabolic mirror gathers substantial light while resisting thermal expansion errors during falling night temperatures. Supported by a backlash-free 2-inch Crayford focuser, this Omegon ProNewton OTA delivers high-contrast visual performance across magnifications from 29x up to 406x.

2-Inch Dual-Speed Crayford Focuser & CNC Tube Rings

Delivering sharp planetary images and deep-sky views requires steady mechanical focus tuning. The Omegon ProNewton N 203/1000 OTA features a 2-inch Crayford focuser with a 1:10 micro-drive for precise adjustments. Its CNC-machined tube rings and Vixen-style dovetail bar ensure secure attachment and balanced weight distribution on equatorial mounts.

• 2-inch dual-speed Crayford focuser with 1:10 precision micro-focus reduction
• CNC-machined aluminum tube rings with pre-mounted Vixen-style dovetail bar
• Step-down 1.25-inch reduction adapter included for standard visual eyepieces

Omegon ProNewton N 203/1000 OTA Warranty

The Omegon ProNewton N 203/1000 OTA is backed by a 2-year limited warranty against material and manufacturing defects. The complete factory shipment package contains the 203mm quartz Newtonian optical tube assembly, CNC-machined tube ring set, pre-mounted Vixen-style dovetail bar, 2-inch Crayford focuser, and a 1.25-inch step-down reduction adapter.