A Tele Vue 8mm Plossl in the Celestron StarSense Explorer LT 80AZ gives 112x, a 0.44 degree true field and a 0.7 mm exit pupil. The worked calculation and whether it sits in the useful range.

Updated 05 September 2026.

Eyepiece and telescope pairing

Tele Vue 8mm Plossl in the Celestron StarSense Explorer LT 80AZ: magnification and field

What the Tele Vue 8mm Plossl does in the Celestron StarSense Explorer LT 80AZ, worked from the published focal lengths and apparent field.

Field of view

ring = 0.44 degrees true
dot = 0.7 mm exit pupil

Computed optics

Magnification
112x900 mm / 8 mm
True field
0.44 degrees50 deg / 112x
Exit pupil
0.7 mm80 mm / 112x
Max useful mag
189xpublished
Barrel match
1.25 in eyepiece in a 1.25 in focuser
Fits

Good fit. In the Celestron StarSense Explorer LT 80AZ the Tele Vue 8mm Plossl gives 112x with a 0.44 degree true field and a 0.7 mm exit pupil, inside the telescope's useful range.

Magnification is the telescope focal length divided by the eyepiece focal length: 900 mm divided by 8 mm is 112x. The true field of view is the eyepiece's 50 degree apparent field divided by that magnification, 0.44 degrees.

The exit pupil, the width of the light beam leaving the eyepiece, is the aperture divided by the magnification, 80 mm over 112x, which is 0.7 mm. That makes this a high-power lunar, planetary and double-star setting.

The eyepiece to buy

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Related

Celestron StarSense Explorer LT 80AZ80 mm f/11.25
Tele Vue 8mm Plossl8 mm, 50 deg
Best eyepiece for the Celestron StarSense Explorer LT 80AZexit-pupil match

Questions and answers

Tele Vue 8mm Plossl in the Celestron StarSense Explorer LT 80AZ: magnification and field?

Good fit. In the Celestron StarSense Explorer LT 80AZ the Tele Vue 8mm Plossl gives 112x with a 0.44 degree true field and a 0.7 mm exit pupil, inside the telescope's useful range.