Eyepiece Magnification Calculator

Create a custom eyepiece magnification table for any combination of telescope and eyepieces
Click here for the Advanced Eyepiece Calculator

Step 1) Enter the multiplication factor of your Barlow lens		Note: Set to "0" (zero) if no Barlow used
Step 2) Enter a brief label that describes your telescope
Step 3) Enter the focal length of your telescope in millimeters If you do not know your telescopes focal length in millimeters then enter it in inches		mm
		inches Note: Set to "0" (zero) if mm entered
Step 4) Enter the focal length of each of your eyepieces in millimeters. Note: Enter "0" (zero) for any unused positions	Eyepiece 1	mm
	Eyepiece 2	mm
	Eyepiece 3	mm
	Eyepiece 4	mm
	Eyepiece 5	mm
	Eyepiece 6	mm
	Eyepiece 7	mm
	Eyepiece 8	mm
	Eyepiece 9	mm
	Eyepiece 10	mm
	Eyepiece 11	mm
	Eyepiece 12	mm
	Eyepiece 13	mm
	Eyepiece 14	mm
	Eyepiece 15	mm
	Eyepiece 16	mm
	Eyepiece 17	mm
	Eyepiece 18	mm
	Eyepiece 19	mm
	Eyepiece 20	mm
Step 5) Calculate and display table

Boeing Employees' Astronomical Society