Feature

●The Orion 7.2-21.6mm Zoom Telescope Eyepiece allows you to change magnification power without swapping out eyepieces.
●Quickly twist the eyepiece housing to change the focal length from 21.6mm at the lowest power to 7.2mm at the highest, allowing for a continuous range of magnification adjustment.
●The eyepiece consists of seven lens elements in four groups, which are fully multi-coated with anti-reflection coatings for a crisp and bright view.
●Exceptionally long 18mm-20mm eye relief range allows for the use of eyeglasses without reducing the field of view visible through the eyepiece.
●65-deg to 42-deg field of view.


Description

Orion 7.2-21.6mm Zoom Telescope EyepieceOrion 7.2-21.6mm Zoom Telescope Eyepiece
Orion 7.2-21.6mm Zoom Telescope EyepieceOrion 7.2-21.6mm Zoom Telescope Eyepiece
User level Intermediate
Eyepiece focal length 21.6mm - 7.2mm
Barrel size 1.25"
Apparent field of view 42.0° - 65.0°
Eye relief 20.0mm
Coatings Fully multi-coated
Number of elements 7
Field stop diameter 16.0mm
Barrel security recess No
Rubber eyeguards Yes
Body material Aluminum
Weight (oz.) 8
Dimensions 3.6 in. x 2.0 in.

The Orion 7.2-21.6mm Zoom Telescope Eyepiece is a welcome addition to any telescope accessory toolkit. This eyepiece has been a proven performer - it comes included in the Orion GrandView ED line of spotting scopes. Weve been so impressed with the optical performance there that we realized it would make an excellent astronomical eyepiece in its own right!

Having multiple magnifications all built into one eyepiece allows the observer to quickly zoom to the right power for lunar, planetary and deep-sky observing, optimizing the size and contrast of the object on the fly. Actual magnification range will depend on the focal length of your telescope, but as an example: in an Orion SkyQuest 8" Dobsonian reflector with a 1200mm focal length, this eyepiece provides a continuous magnification range from 56x up to 167x.

This 7 element telescope eyepiece provides exceptional edge performance, and boasts fully multi-coated optics and extra-long eye relief ranging from 20mm (at 21.6mm) to 18mm (at 7.2mm). The apparent field of view angle ranges from 42-deg (at 21.6mm) to 65-deg (at 7.2mm). Excellent optics, coupled with a wide field of view make this eyepiece just about the perfect eyepiece to pair with any telescope!