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Telescope Magnification Calculator

This calculator requires the use of Javascript enabled and capable browsers. This calculator is designed to give the magnification characteristics for a given telescope, based on the data entered for the scope's operating specifications. Enter the eyepiece size in millimeters; also enter the lens' focal ratio. Enter the scope's primary mirror size. Click on Calculate for the scope's magnification information.


Designation
Value
Required Data Entry
Eye Piece Size Value (mm)
Scope Focal Ratio (f)
Size of Primary Mirror Inches
   
Calculated Results
Maximum Useful Magnification x
Calculated Magnification Value x
Barlow @ 2x x
Updated 8.15.11


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