Orion E-Series Zoom Eyepiece

The Orion E-Series Zoom Eyepiece offers a single eyepiece that you can adjust to alter its focal length which changes its magnification. Put the eyepiece into your telescope and by simply turning the barrel of the zoom eyepiece you will zoom into or out from whatever you are looking at.

E-Series Zoom EyepieceWith a simple twist of the barrel the 1.25” E-Series Zoom Eyepiece changes the focal length from 21mm to 7mm, or to any focal length in between. That makes it ideal for locating an object at low magnification, then quickly zooming in to higher magnification for closer inspection, all without changing eyepieces.

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 of 57x-171x. And the E-Series Zoom works equally well for astronomical or terrestrial viewing in smaller refractor or Cassegrain design telescopes.

This 6 element telescope eyepiece offers fully multi-coated optics and exceptionally long eye relief ranging from 18mm (at 21mm) to 16.3mm (at 7mm). The apparent field of view angle ranges from 40° (at 21mm) to 57° (at 7mm). The 1.25″ barrel is threaded for standard eyepiece filters.

E-Series Zoom Eyepiece specifications include:

– Eyepiece focal length: 21.0mm – 7.0mm

– Barrel size: 1.25″

– Apparent field of view: 40.0° – 57.0°

– Coatings: Fully multi-coated

– Number of elements: 6

– Filter threads: Yes

– Parfocal: No

– Field stop diameter: 16.0mm

– Barrel security recess: Yes

– Rubber eyeguards: Yes

– Body material: Aluminum

Weight (oz.): 5

Dimensions: 3.7 in. x 1.7 in.

You can learn more about the Orion E-Series Zoom Eyepiece here.

And if one eye is not enough, Orion’s new 80mm ED Semi-Apo Binocular Spotting Scope sports two eyepieces. And viewing with two eyes instead of just one makes observing the night skies much more comfortable and provides an incredible 3D-like depth of field.

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