Omegon 90/500 OTA Telescope

Description

Scan wide star fields and terrestrial landscapes with the Omegon 90/500 OTA Telescope achromatic refractor optical tube assembly. Designed in Germany, this portable f/5.5 refractor telescope features a 90mm (3.54 inches) aperture and a 500mm focal length. The Omegon 90/500 OTA delivers 1.29 arcsecond Dawes resolving power and reaches a limiting visual magnitude of 11.5 for stargazers.

Built for grab-and-go versatility, the Omegon 90/500 OTA Telescope features a two-element air-spaced crown and flint glass doublet objective with multi-coated anti-reflective layers on all air-to-glass surfaces. Its fully enclosed rigid aluminum tube includes internal matte-black anti-reflection baffles to maximize visual contrast. Weighing only 1.80 kg (3.97 lbs) with 110mm by 410mm dimensions, this compact 90mm refractor OTA mounts easily to standard astronomy tripods.

Key Features of Omegon 90/500 OTA Telescope

Designed for rich-field sky viewing and daylight spotting, this Omegon 90/500 refractor optical tube assembly combines a lightweight aluminum tube with multi-coated doublet optics. Its unobstructed aperture and smooth rack-and-pinion focuser provide sharp, high-contrast views across open star clusters and scenic landscapes.

• 90mm (3.54 inches) aperture with 500mm focal length and fast f/5.5 optical speed
• Two-element air-spaced achromatic doublet using crown and flint optical glass
• Multi-coated anti-reflective treatment on all air-to-glass optical surfaces
• 0% secondary mirror obstruction for high-contrast unobstructed light transmission
• Fully enclosed aluminum tube construction with internal matte-black glare baffles
• 1.25-inch rack and pinion focuser with manual tension adjustment screw
• Standard Vixen-style dovetail mounting plate bracket pre-mounted to tube body
• Quick-release finder shoe profile for auxiliary aiming accessories

Two-Element Air-Spaced Achromatic Optics

The 90mm objective lens utilizes precision crown and flint glass elements to minimize chromatic aberration across wide fields of view. With zero central obstruction (0.0%), this portable Omegon refractor OTA supports clean visual observations across magnifications from 13x up to 180x.

Compact Aluminum Chassis & Mechanical Focuser

Quick field deployment requires a lightweight, dependable mechanical platform. The Omegon 90/500 OTA incorporates a 1.25-inch rack and pinion focuser with a manual tension adjuster screw to hold visual eyepieces securely. Its pre-installed Vixen-style dovetail plate enables instant mounting onto compatible alt-azimuth or equatorial mounts for rapid observation setups.

• Smooth 1.25-inch rack and pinion drive focuser with adjustable tension control
• Integrated Vixen-style dovetail bracket plate for quick mount attachment
• Fitted quick-release finder base shoe for attaching standard finder scopes

Omegon 2-Year Limited Warranty

Designed in Germany, the Omegon 90/500 OTA Telescope is backed by a 2-year limited warranty against material and manufacturing defects. The factory package contains the 90mm achromatic refractor optical tube assembly, 1.25-inch rack and pinion focuser, pre-mounted Vixen-style dovetail bracket plate, and plastic objective lens protective cap.