Brand] : Celestron Celestron

[Model]: Celestron 7-21mm zoom eyepiece telescope

[ Focal Length ] : 7mm-21mm, stepless zoom, zoom Promise

:7-21mm focal length

Coating: green film

Dimension : 90 * 40 * 40mm

Weight : 163g

Weight : 200g

- Size: Standard 1.25 inches / 31.7mm Telescope GM Accessories

[ Coating ]: optical lenses , FMC whole green film coated , high-definition

 [Applicable ]: dual world , for all telescopes (31.7mm Interface ) for viewing the scenery and the astronomical observations of the lunar surface , planets , nebulae , star clusters , diffuse nebulae and other celestial bodies , high brightness, large field of view, observing very comfort ; all-metal lens barrel , full multi-coated , high-quality optical performance.

 

 A zoom eyepiece is equivalent to more than one eyepiece , high power to low power , short-focus to telephoto , cost is very high , easy adjustment factor, very practical eyepiece

 

 7-21 ZOM eyepiece focal length of 7-21MM adjustable magnification = telescope lens focal length divided by the focal length of the eyepiece . This eyepiece optical effects superior , quality craftsmanship , is the best choice for astronomy lovers !

Professional -level all- optical coating becomes eyepiece , all-metal materials , providing 7-21 times the continuous optical zoom function , suitable for all 31.7 ( 1.25 in. ) diameter telescope eyepiece or view mirror to use.

This eyepiece optical effects superior , quality craftsmanship , full FMC green film , is the best choice for astronomy lovers !