Orion StarMax 90mm TableTop Maksutov Cassegrain Telescope with f/13.9 Focal Ratio, EZ Finder II Finder Scope

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About the Orion 90 Maksutov Cassegrain

Whoever coined the phrase "big things come in small packages", would have definitely applied that expression to new StarMax 90 TableTop Refractor. This ultra-compact Mak-Cass gives surprisingly big views for an instrument of its modest size, making it an elegant first telescope or a great grab-and-go second telescope!

The long, 1250mm (f/13.8) focal length gives the StarMax 90 TableTop some serious magnifying power - the included 25mm and 10mm 1.25" Super 3-element eyepieces yield powers of 50x and 125x, respectively. It collects over 25% more light than its GoScope 80 cousin and up to 225% more light than a 60mm refractor telescope. So you'll be able to enjoy planetary delights such as lunar landscapes, Saturn's rings and Jupiter's moons. As you scan the Milky Way, you'll also be able to pull in some open and globular star clusters, as well as a nebula or two.

The tube assembly of the StarMax 90mm TableTop Refractor Telescope is attached to a stable swivel base, via a quick-release dovetail mount with adjustable altitude tension. The tube can easily be removed from the base and mounted on an optional photo tripod. The small swivel base itself can also be mounted on a camera tripod with a 3/8" screw.

A red-dot view finder, internal focuser (which moves the primary lens back and forth) and included 90-degree star diagonal round out the features of this compact, yet surprisingly capable, Mak Cass telescope.

Orion 90 Maksutov Cassegrain Includes

  • Orion StarMax 90mm TableTop Mak-Cassegrain Telescope
  • 90-Degree Star Diagonal
  • 25mm Telescope Eyepiece
  • 10mm Telescope Eyepiece
  • EZ Finder II Reflex Sight
  • 3/8in-to-1/4in-20 Threaded Adapter for Tripod Attachment
  • Orion 1 Year Warranty

Orion 90 Maksutov Cassegrain Features

  • Collects over 225% more light than a 60mm refractor telescope
  • Red-dot finder makes it easy to locate objects in the night sky
  • Observe the Moon, planets, star clusters, even some nebulae and galaxies
  • Table-top base can be easily mounted on a tripod with a 3/8" screw
  • Lightweight, compact design lets you take the StarMax 90 anywhere

Orion 90 Maksutov Cassegrain Specifications

Use Astronomy and terrestrial
User level Beginner
Optical design Maksutov-Cassegrain
Optical diameter 90mm
Focal length 1250mm
Focal ratio f/13.9
Optics type Spherical
Eyepieces included 3-Element 25.0mm, 10.0mm
Magnification with included eyepieces 50x, 125x
Resolving power 1.29 arc x sec
Lowest useful magnification 13x
Highest useful magnification 180x
Limiting stellar magnitude 12.5
Optical quality Diffraction limited
Finder scope EZ Finder II
Focuser Internal
Diagonal 1.25" 90-deg Prism Star
Secondary mirror obstruction 29mm
Secondary mirror obstruction by area 0.1
Mount style Altazimuth
Polar-axis scope Not available
Tube material Aluminum
Tripod material Wood
Length of optical tube 10.0"
Weight, optical tube 3.7 lbs/1.68kg
Weight, mount/tripod 2.8 lbs/1.27kg
Weight, fully assembled 6.5 lbs/2.94kg
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