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MAGNIFICATION - FOV CALCULATOR

Astro Calculator

This is my page for calculating Magnification, Actual Field of View, and Focal Ratio.

Telescope Focal Length (mm) =
Aperture (mm) (1" = 25mm) =
Eyepiece Focal Length (mm) =
Eyepiece Apparent Field of View (Deg) =
  No Barlow
  2X Barlow
  3X Barlow
 
Magnification =
Actual Field of View =
Focal Ratio =