Telescope Calculator

To Calculate Telescopes Magnification:
Aperture or Diameter of Objective:
Focal Ratio of Scope or Length:
Eye Piece Value: mm
Apparent Field: degrees
Barlow Lens: X
Magnification Range: X to X
True Field: arc minutes
Resolving Power: arc seconds
Magnification: X
Light Grasp: X
Limiting Magnitude: arc seconds
Exit Pupil: arc seconds