AstroShop Optical Calculator

Eyepiece power calculator
Eyepiece focal length mm (On side of eyepiece)
Telescope focal length mm

 


Focal Ratio calculator
Telescope aperture mm
Telescope focal length mm

 


Eyepiece Actual Field Of View
Eyepiece Power x (Use power calculator above)
Apparent Field of View (degrees)

 



All listed prices are GST inclusive and we deliver throughout Australia.
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