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Choose from over 190 telescopes and more than 140 eyepieces then let the calculator do the work for you!

Select a telescope from the menus below.  Then choose an eyepiece.
Click on the Calculate button and the magnification, field of view,
and exit pupil will be displayed.
 
Choose Telescope

Choose Eyepiece



Magnification: 

Field of View: 

Exit Pupil: 



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