http://www.celestron.com/browse-shop/astronomy/telescopes/firstscope-telescope
Optical Design
Newtonian Reflector
Aperture (mm)
76 mm (2.99 in)
Focal Length
300 mm (12 in)
Focal Ratio
3.95
Focal Length of Eyepiece 1 (mm)
20 mm (0.79 in)
Magnification of Eyepiece 1
15 x
Focal Length of Eyepiece 2 (mm)
4 mm (0.16 in)
Magnification of Eyepiece 2
75 x
Highest Useful Magnification
180 x
Lowest Useful Magnification
11 x
Limiting Stellar Magnitude
11.9
Resolution (Rayleigh)
1.83 arc seconds
Resolution (Dawes)
1.53 arc seconds
Light Gathering Power (Compared to human eye)
118 x