Home Up Eyepiece Calculator CCD Calculator

These calculators are meant for relatively simple applications, following some simple rule-of-thumb formulae. They are not meant to be used for highly accurate applications.

 

What magnification will you get with an eyepeice ?

Focal length of telescope :    mm
Focal length of eyepiece : mm
   
Magnification : x

What field of view will you get with an eyepeice ?

Focal length of telescope :    mm
Focal length of eyepiece :   mm
Apparent Field of view of eyepiece :
(Plossl=43°, Superwide=68°, Ultrawide=83°) 		  degrees
   
True Field of view : degrees

What is the maximum magnification I should realistically expect for visual use of my telescope ?

Size of Objective lens of telescope :     mm
   
Maximum magnification : x

 

 

 

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