Tele Vue Optics Article Page

Tele Vue Eyepiece Calculator

Follow the 3 steps below to see the table. Use browser back button to see prior results.

(1) Enter any 2 of the 3 parameters for your telescope.

Focal Length Aperture
Focal Ratio (f/#)

(2) Choose telescope preferences.

Does your telescope accept 2" eyepieces? YES NO
Are you using a Tele Vue Paracorr? YES NO
(3) Select table presentation order and press calculate button. Sort Results By:

You must enter 2 telescope parameters
to see table results.

Design

Focal
Length
(mm)

Apparent
Field
(°)

Eye
Rel.
(mm)

Barrel
Size

Mag.
(x)

Exit
Pupil
(mm)

True
Field
(°)

True
Field
@
1000
yards
(feet)

Mag.
w/2x
Barlow
(2x)

Mag.
w/2x
Big Barlow
or
Power-
mate
(2x)

Mag.
w/2.5x
Power-
mate
(2.5x)

Mag.
w/3x
Barlow
(3x)

Mag.
w/4x
Power-
mate
(4x)

Mag.
w/5x
Power-
mate
(5x)

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