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CELESTRON
Zoom Eyepiece 7mm to 21mm . . . . Rs.5,700
FC-coated -ZOOM Eyepiece 7mm-21mm
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
 
  • 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 Zoom
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.
 
 
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