My Zhumell 12" dob specifications

Apperture - 305 mm (12 inch)
Focal Length - 1500mm
Focal Ratio - f/4.93
Star Diagonal - 1.25 Inches (32 mm)

Finderscope - 8x50

GoTo - No

Weight Complete - 75 lbs (34 kg)

Total height - 63 inches (160 cm)

OTA length - 60 inches (152.5 cm)

Base height - 27 inches (68.5 cm)

Base diameter - 25.5 inches (65 cm)

Calculated

Aperture Gain - 1900

Visual magnitude limit - 14.2

Max FOV - 1.9 deg

Resolution - 0.38 - 0.68 sec
Maximal Magnification - 300
Optimal Magnification - 150
Minimal Magnification - 42
Absolute Maximum Magnbification - 750

See the great Telescope Equations site for the underlying theory and formulas.