Norfolk Astronomical Society
Telescope Parameter Calculator
©2002 Glendon L. Howell
Select unit system:
English
Metric
Telescope Input Parameters
Aperture
Focal Length
Barlow Power
Ocular (mm)
Computed Results
Effective Focal Ratio
Effective Focal Length
Min. Guiding Power
x
Telephoto Mag Over 50mm
x
Camera FOV 24mm Side
arcmin
Camera FOV 36mm Side
arcmin
Resolution
arcsec
Light Grasp Vs Naked Eye
x unaided eye
Limiting Magnitude
Min. Useful Power
x
Max. Useful Power
x
Input Ocular Power
x
40mm Ocular Power
x
30mm Ocular Power
x
20mm Ocular Power
x
10mm Ocular Power
x
5mm Ocular Power
x
2.5mm Ocular Power
x