A Tele Vue 24mm Panoptic in the Sky-Watcher Skymax 150 gives 75x, a 0.91 degree true field and a 2 mm exit pupil. The worked calculation and whether it sits in the useful range.

Updated 05 September 2026.

Eyepiece and telescope pairing

Tele Vue 24mm Panoptic in the Sky-Watcher Skymax 150: magnification and field

What the Tele Vue 24mm Panoptic does in the Sky-Watcher Skymax 150, worked from the published focal lengths and apparent field.

Field of view

ring = 0.91 degrees true
dot = 2 mm exit pupil

Computed optics

Magnification
75x1800 mm / 24 mm
True field
0.91 degrees68 deg / 75x
Exit pupil
2 mm150 mm / 75x
Max useful mag
about 300x2x aperture
Barrel match
1.25 in eyepiece in a 2 in focuser
Fits

Good fit. In the Sky-Watcher Skymax 150 the Tele Vue 24mm Panoptic gives 75x with a 0.91 degree true field and a 2 mm exit pupil, inside the telescope's useful range.

Magnification is the telescope focal length divided by the eyepiece focal length: 1800 mm divided by 24 mm is 75x. The true field of view is the eyepiece's 68 degree apparent field divided by that magnification, 0.91 degrees.

The exit pupil, the width of the light beam leaving the eyepiece, is the aperture divided by the magnification, 150 mm over 75x, which is 2 mm. That makes this a medium-power general setting.

The eyepiece to buy

Shop Tele Vue 24mm Panoptic on AmazonaffiliateFind Tele Vue 24mm Panoptic on eBayaffiliate

Related

Sky-Watcher Skymax 150150 mm f/12
Tele Vue 24mm Panoptic24 mm, 68 deg
Best eyepiece for the Sky-Watcher Skymax 150exit-pupil match

Questions and answers

Tele Vue 24mm Panoptic in the Sky-Watcher Skymax 150: magnification and field?

Good fit. In the Sky-Watcher Skymax 150 the Tele Vue 24mm Panoptic gives 75x with a 0.91 degree true field and a 2 mm exit pupil, inside the telescope's useful range.