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)
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