A zoom eyepiece replaces several eyepieces with fixed focal lengths. By rotating the eyepiece housing, the lens elements are shifted, so that the magnification varies.
A disadvantage of the zoom eyepiece is the lower apparent field of view. For objects such as the Moon or the planets, it is much more convenient to not to have to change the eyepiece constantly when you want to change the magnification.

Omegon
Magnum 1.25'', 8-24mm zoom eyepiece
$ 59.00
ready for shipping in 24
h

Baader
Hyperion Universal Mark IV 2", 8-24mm Zoom eyepiece
( 5 / 5 )
$ 288.00
ready for shipping in 24
h

Omegon
Super Ploessl zoom shot eyepiece 7-21mm APO 1.25"
$ 69.00
ready for shipping in 24
h

Baader
Hyperion Universal Mark IV zoom eyepiece + zoom Barlow lens set
$ 382.00
ready for shipping in 24
h

Omegon
Premium 1.25", 7.2 mm - 21.5mm zoom eyepiece
$ 139.00
ready for shipping in 24
h

Celestron
Zoom eyepiece 8-24mm 1.25"
$ 156.00
ready for shipping in 24
h

Skywatcher
HyperFlex-7E High-Performance Zoom 7.2mm-21.5mm Eyepiece
$ 156.00
ready for shipping in 24
h

Omegon
Premium 7.5mm - 22.5mm zoom eyepiece
( 5 / 5 )
$ 299.00
ready for shipping in 24
h

Skywatcher
Hyperflex 7E2 HighPerformance 1.25" 9mm-27mm zoom eyepiece
$ 135.00
ready for shipping in 1-2
weeks

Lunt Solar Systems
1.25" 7.2mm - 21.5mm zoom eyepiece
$ 365.00
ready for shipping in 1-2
weeks

Pentax
SMC XL 8-24mm (JIS Class 4, weather-resistant) eyepiece
$ 580.00
ready for shipping in 1-2
weeks

TS Optics
1.25" 7-21mm zoom eyepiece
RRP:
$ 73.00
Our price:
$ 63.00
ready for shipping in 3-7
days

Skywatcher
8-24mm zoom shot eyepiece
$ 121.00
ready for shipping in 1-2
weeks

Bresser
Zoom eyepiece LER Deluxe 8-24mm 1.25"
$ 250.00
ready for shipping in 1-2
weeks

Bresser
Zoom eyepiece LER 8-24mm 1.25''
$ 156.00
ready for shipping in 1-2
weeks

APM
Zoom eyepiece 7.7 - 15.4 mm 67° TMB-Barlow 1.25"
$ 710.00
ready for shipping in 1-2
weeks

APM
Zoom eyepiece 7.7-15.4mm 67° 1.25"
( 5 / 5 )
$ 449.00
ready for shipping in 1-2
weeks

Pentax
SMC XF 6.5-19.5mm 1.25" eyepiece
$ 365.00
ready for shipping in 24
h

Artesky
Zoom eyepiece 8-24mm 1.25"/2"
$ 210.00
ready for shipping in 3-5
weeks

Auriga
1.25" 7.2mm - 21.5mm zoom eyepiece
$ 156.00
ready for shipping in 1-2
weeks

Auriga
Zoom eyepiece 9mm - 27mm 1.25"
$ 135.00
ready for shipping in 1-2
weeks

TeleVue
Eyepiece Nagler Zoom 3mm - 6mm
RRP:
$ 720.00
Our price:
$ 627.00
ready for shipping in 6-10
weeks