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To enhance the enjoyment of your FirstScope, Celestron offers a FirstScope Accessory Kit (# 21024-ACC) and also various
other accessory items. Details are available on the Celestron website.
FirstScope Specifications
Model # 21024
Optical Design Newtonian reflector
Aperture 76mm (3.0")
Focal Length 300mm
Focal Ratio f/4
Optical Coatings Coated
Eyepieces - 1.25" Barrel 20mm (15x), 4mm (75x)
Apparent FOV -- 20mm @ 25° and 4mm @ 33°
Angular Field of View w/20mm eyepiece 1.7°
Linear FOV w/20mm –ft@1000yds/m@1000m 89/29
Limiting Stellar Magnitude 11.9
Resolution -- Raleigh (arc seconds) 1.82
Resolution -- Dawes Limit " " 1.53
Light Gathering Power 118x
Optical Tube Length 10.5" (26.7cm)
Telescope Weight 69oz (2kg)
(Products or instructions may change without notice or obligation.)
2835 Columbia Street
Torrance, CA 90503 U.S.A.
Tel. (310) 328-9560
Fax. (310) 212-5835
Website www.celestron.com
Copyright 2009 Celestron Item # 21024-INST Rev.2
All rights reserved 03-09
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