Eyepiece | The Zoom Eyepiece

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The Zoom Eyepiece 7mm to 21mm . . . . Rs.5,700

Sky-Watcher FC-coated APO-Series APO-ZOOM 7mm-21mm

Design

: 4-element Huygenian

Focal Length

: 7-21mm

Apparent Field of view

: 43 to 30 degree

Eye Relief

: 16-33mm

Exit Pupil

: 1.40- 4.10mm

Fold down Rubber Eye cup

Change the Power Without Changing Eyepieces

The finest zoom eyepiece....... fully multi-coated optics......... High-eye relief

Now a casual telescope user can enjoy the benefits of zoom eyepiece from 21mm to 7mm or to any eyepiece focal length in between. Internal zoom lenses move on smooth and precisely machined parts. Performance is fully constant with the finest fixed -focal length eyepieces. A whole range of imported eyepiece in this one zoom eyepiece combined. Actual magnification range will depend on the focal length of your telescope. It works equally well for astronomical or terrestrial viewing. . Rubber traction ring ensures a good grip. The 1.25" barrel is threaded for filters and rubber eyecup are standard

Explorer II 7-21mm Zoom . . . . Rs.6,600

Zoom eyepieces lets you change magnification power without changing eyepieces
A twist of Explorer II's housing changes focal length from 21mm to 7mm
Four-lens eyepiece has fully coated optics and exceptionally long eye relief
The 1.25" barrel is threaded for filters

Design	Proprietary
Eyepiece focal length	21.0mm - 7.0 mm
Barrel size	1.25in.
Apparent field of view	30.0-deg - 43 -deg
Eye relief	33.0mm
Coatings	Fully coated
Number of elements	4
Filter threads	Yes
Parfocal	No
Barrel security recess	No
Blackened lens edges	Yes
Rubber eyeguards	No
Body material	Aluminum
Weight (oz.)	5.67
Dimensions	3.2 in. x 1.6 in.
Warranty	One Year

Now even the casual telescope user can enjoy the benefits of zoom eyepiece technology. A twist of the affordable 7-21mm Orion Explorer II Zoom Telescope Eyepiece 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 telescope 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!