Orion

Orion Apex 90mm Maksutov Cassegrain Telescope Kit with Eyepiece & Software, 90mm Optical Diameter, f/13.9 Focal Ratio

SKU: ONA90MC MFR: 09820
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$229.95
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About this item

The Orion Apex 90mm Maksutov Cassegrain Telescope has light-folding Maksutov-Cassegrain design. It permits large-diameter optics, 90mm, to be housed in an unusually compact, wonderfully portable tube. As a spotting scope, the Apex 90 gathers more light than typical field scopes, serving up brighter, more highly resolved images even in the dimmest of lighting conditions.

Multi-coatings applied to the curved front lens guarantee the highest possible light transmission. For astronomy, the Apex telescope exhibits all the performance of classic long-tube 90mm refractors and easily outperforms smaller refractors on views of the planets and Moon as well as on faint nebulas and star clusters. Its long focal length allows high-power study of Jupiter's cloud belts and Red Spot and Saturn's rings and provides long reach for capturing distant terrestrial targets. The Apex telescopes accept standard 1.25" telescope eyepieces for nearly unlimited magnification options.

The Apex 90 comes with a multi-coated 25mm Sirius Plossl eyepiece (1.25") and a 45° diagonal that provides a correctly-oriented field of view. As does the correct-image finder scope (6x20 on Apex 90), which makes locating objects a cinch. The finder scope is held in a quick-release dovetail bracket for easy assembly and disassembly. It also includes a rugged, fully padded carrying case to protect your instrument. It's got hand and shoulder straps and ample pockets for accessories. The scope easily pops on and off a telescope mount or camera tripod with the built-in 1/4"-20 adapter plate. And it doubles as a high-power telephoto lens for photography, too by mounting a 35mm camera body (with optional T-ring) to the T-threads on the eyepiece holder.

What's Included With This Item

  • Orion Optical Tube Assembly
  • 25mm Sirius Plossl Eyepiece (1.25")
  • 45-Deg Correct-Image Diagonal (1.25")
  • 6x20 Correct-Image Finder Scope
  • Finder Scope Bracket with O-Ring
  • Dust Cap
  • Soft Carry Case
  • Starry Night Special Edition Software
  • Orion 1 Year Limited Warranty

Key Features

  • Small enough to store on a bookshelf but with the power of traditional scopes five times its size
  • 90mm aperture and 1250mm focal length for fantastic celestial and terrestrial views
  • Includes one eyepiece, finder scope, diagonal, case and Starry Night astronomy software

Technical Specs

Use Astronomy & terrestrial
User level Beginner
Optical design Maksutov-Cassegrain
Optical diameter 90mm
Focal length 1250mm
Focal ratio f/13.9
Eyepieces included Sirius Plossl 25.0mm (1.25")
Magnification with included eyepieces 50x
Resolving power 1.29arc sec
Lowest useful magnification 13x
Highest useful magnification 180x
Limiting stellar magnitude 12.5
Optical quality Diffraction limited
Finder scope 6x20 Correct-image
Focuser Internal
Diagonal 1.25" 45-deg Prism Correct-image
Secondary mirror obstruction 29mm
Secondary mirror obstruction 32% by diameter
Secondary mirror obstruction by area 10%
Mount style Optical Tube without Mount
Astro-imaging capability Lunar & planetary
Tube material Aluminum
Length of optical tube 10.0 in
Weight, optical tube 3.7 lbs
Warranty Orion 1 year limited warranty
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