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Explore Scientific AR102mm Refractor

Img 4647 orion 80mm ed v2

Keywords: Basic Refractor


Currently there are 4 requests to borrow this.



The Explore Scientific AR102 telescope is out for maintenance.. Until it is returned, an Orion 80mm ED refractor has been substituted. An ED refractor uses modern "Extra-Low Dispersion" glass to provide a sharper image than is possible with a short tube acromat using traditional flint and crown glass elements. The Orion 80ED  is a general purpose telescope that will give sharp images of the moon and planets as well as the brighter star clusters and galaxies. The 80mm aperture lens gathers less light than a 100mm aperature telescope but ED glass improves the image contrast. This 80ED telescope includes a  good quality single speed focuser, a one-piece 2" diagonal with 99% dielectric coatings, a 6x30 correct image right angle finderscope with quick release bracket, and a cradle ring assembly with a Vixen-style dovetail mount. The smaller 80mm ED telescope is a good match for the Twilight I Alt-Azimuth mount, which is designed to quickly and easily accept small to medium sized refractors.  Slow-motion control cables are attached on the vertical and horizontal axes, and are easy to turn during the night.


The Explore Scientific AR102 telescope is a classic doublet achromatic f/6.5 refractor designed to provide low  magnification, wide field views of the sky. This telescope includes a 2" dual-speed Crayford-style focuser, a one-piece 2" diagonal with 99% dielectric coatings, an 8 X 50 non-illuminated straight -thru finderscope and quick release bracket, and a cradle ring assembly with Vixen-style dovetail mount.





The Orion 80mm f/7.5 ED telescope has an 80mm aperture (diameter) lens of 600mm focal length., 

102mm Achromatic Air Space Doublet Refractor

  Focal Length 663mm
  Focal Ratio f/6.5
  Tube Length
w/ Dew Shield
25.5"; 698mm
  Diameter 101mm
  Weight 10.4lb; 4.7kg
  Dovetail Vixen


Tripod fully collapsed no mount head 29.5"
Tripod fully collapsed with head 42"
Tripod open, retracted legs no mount head 25"
Tripod open, retracted legs with the mount head 38.5" at highest point, 36" to the center of the mounting bracket
Tripod open, legs fully extended
no mount head
Tripod open, legs fully extended with the mount head 55.5" at highest point, 53" to the center of the mounting bracket
Mount head dimensions 14" x 7" x 4"
Foot print 42"
Weight tripod base 11lb; 5.0kg
Weight mount head 6.6lb; 3.0kg
Total weight 16.7lb; 7.6kg


More information about this telescope and mount can be found at the Explore Scientific website: http://explorescientificusa.com/collections/telescopes/products/102mm-achromatic-refractor and http://explorescientificusa.com/collections/twilight-ii/products/twilight-1-mount .

Currently Loaned out

Requests to Borrow

There are 4 other members with requests to borrow this equipment.