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

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About 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 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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