Brands - JMI

JMI

Menu

Edmund's Astroscan (Discontinued)


$165.00


SKU: SKU3638
Telescope Type: Newtonian Reflector
Aperture (in.): 4.125 inches
Aperture (mm): 105 mm
Focal Ratio: f/4.2
Focal Length: 445 mm

This product is no longer available
Used Edmund's Scientific Astroscan telescope in very good condition. 

Description (Wikipedia)

The Astroscan had a Newtonian reflector layout with a 4⅛" clear-inch (105mm) diameter f/4.2 aluminized and overcoated borosilicate glass parabolic primary mirror with a focal length of 17½ inches (445mm).[1] The telescope's secondary mirror was mounted on a flat optical window at the front of the tube. The telescope was designed by Norman Sperling and Mike Simmons to be used as an introductory telescope.[2] Rather than using a more traditional equatorial or altazimuth mount the Astroscan features a spherical housing around the primary reflector which sat in a cast aluminum cradle. The design was durable and allowed for simple operation by novice amateur astronomers; it won an Industrial Design Award in 1976.[1] The telescope body was made from high impact acrylonitrile butadiene styrene (ABS) plastic and was equipped with a carrying strap to aid portability.

This telescope includes a quality 28mm Plossl eyepiece that yields 16x magnification with a 3 degree true field of view. The Andromeda galaxy would actually look pretty good at that level of magnification. 28 mm may seem like an odd focal length for an eyepiece, but it yields an exit pupil near the practical limit of 7 mm, much like many popular astronomical binoculars.


There have been no reviews

Only those who bought this product are allowed to add review
If you've already bought this product, please sign in and add your own review!
*
*
*