Skip to content
All-Star Telescope is your source for all things astro from telescopes to astrophotography cameras. Have a question? We'd love to help. Email: info@all-startelescope.com Call Us: (587) 336-6621 Toll Free: 1 (866) 310-8844
Have a question? We'd love to help. Email: info@all-startelescope.com Call Us: (587) 336-6621 Toll Free: 1 (866) 310-8844

Sky-Watcher Skymax 90 (S11500)

SKU 050234115001
Sold out
Original price $340.00 - Original price $340.00
Original price
$340.00
$340.00 - $340.00
Current price $340.00

If you’re seeking crisp, contrasty views with high levels of detail, look no further than the Skymax series, Sky-Watcher’s premiere line of Maksutov-Cassegrains. Generally regarded as producing a sharper image than Schmidt-Cassegrains, Maksutovs offer astronomers a large visual aperture, high contrast and long focal length in a compact package.

Description

These telescopes deliver higher levels of planetary detail due to a focal length that is 5-7 times longer than your average Newtonian or refractor telescope.

Skymax Maksutovs feature mirrors constructed of borosilicate, polished and coated with our proprietary Radiant™ Aluminum Quartz™ (RAQ™) coatings, which produce a remarkable 94% reflectivity. All Maksutovs use a corrector plate to help reduce chromatic aberration, which is then coated using our signature Metallic High-Transmission Coatings™ (MHTC™), producing professional grade optics at an affordable price.

Quick Overview

  • Maksutov-Cassegrain optical design
  • Primary and secondary mirrors feature proprietary Radiant™ Aluminum Quartz™ (RAQ™) coatings
  • Corrector plate featuring Metallic High-Transmission Coatings™ (MHTC™) virtually eliminates chromatic aberrations
  • 90mm aperture, 1250mm focal length, f/13.8 focal ratio
  • Aluminum tube coated with glossy, black diamond metal-flake finish
  • Included accessories: two 1.25-inch eyepieces, red dot finder, 1.25-inch diagonal, ¼-20 mounting plate, and a soft carrying case

What's In the Box

  • Two 1.25-inch eyepieces
  • Red dot finder
  • 1.25-inch diagonal
  • ¼-20 mounting plate
  • Soft carrying case

Specifications

Optical Info
Optical Design ED Triplet Refractor
Lens Coatings Fully Multi-Coated
Glass Type BK7 (2)/FPL-53(ED)
Primary Aperture (mm) 150
F/Ratio 7
Focal Length (mm) 1040
Observational Info
Dawes Limit 0.77
Rayleigh Limit 0.93
Limiting Mag. 13.4
Minimum Magnification 21
Maximum Magnification 295
Light Gathering (compared to next size down) 56%
General Info
Focuser 3.4" Dual Speed R&P
OTA Length (Retract/Ext.) 36.9"/40.5"
OTA Outer Diameter 7.9"
OTA Weight (with accessories) 32
Accessories
Included Finder 8x50 RACI
Included Diagonal 2" Dielectric
Mounting Accessories Rings/D-Rail
Included Eyepieces None
Included Case Yes
Corrector Yes

Customer Reviews

No reviews yet
0%
(0)
0%
(0)
0%
(0)
0%
(0)
0%
(0)