Orion Explorer II 7-21mm Zoom Telescope Eyepiece
by Orion
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Review & Description
Now even the casual telescope user can enjoy the benefits of zoom eyepiece technology. A twist of the affordable Explorer II Zoom housing 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 zooming in at higher magnifications for closer inspection. Without changing eyepieces! Actual magnification range will depend on the focal length of your telescope. It works equally well for astronomical or terrestrial viewing. This four-lens eyepiece boasts fully coated optics and exceptionally long eye relief ranging from 33mm to 16mm. Apparent field of view is 30-deg at 21mm and 43-deg at 7mm. Rubber traction ring ensures a good grip. The 1.25" barrel is threaded for filters. A nice value in a quality zoom eyepiece!
Product Details
- Brand: Orion
Features
- The Orion Explorer II Zoom eyepiece lets you change magnification power without physically changing eyepieces
- A twist of the zoom eyepiece housing changes focal length from 21mm to 7mm, providing a variety of viewing magnification powers
- Eyepiece consists of four elements which are fully coated with anti-reflection coatings for clear, contrasty views
- Exceptionally long eye 33mm relief allows eyeglass wearers to enjoy the entire view while still wearing their corrective lenses without vignetting
- The 1.25" barrel is threaded for use with like-sized Orion eyepiece filters
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