SVBONY Zoom Eyepiece Set, Achieve Zoom Range 3-16mm, SV215 Zoom Eyepiece, 1.25'' 3-8mm Eyepiece Bundle with SV245 8-16mm Telescope Eyepiece, 1.25'' 2'' Dual Interfacefor Astronomy Planetary Visual

The SV215 zoom eyepiece is designed to provide the good balance of contrast, comfortable eye relief, and resolution for the critical planetary observer, particularly those with ultra-premium short focal length refractors. Parfocal Design: SV215 zoom eyepiece maintains focus throughout the zoom. You don't have to refocus when you magnify. Click /Stops: Improve the customer's hand feel of variable times adjustment operation. Smooth zoom action with click-stops at 3, 4, 5, 6,7 and 8mm for quick changes to precise preset magnifications. Apparent Field of View: 56°：The field of view will not change with the change of focal length, the process of doubling to give customers a fixed point to pull into the visual enjoyment. SV245 With 8-element multi-coated optics, including aspheric lenses, SVBONY SV245 Universal Zoom Eyepiece delivers stunning sharpness, contrast, and color correction across a wide 63° field of view. Parfocal from 8-16mm, it eliminates the need for constant refocusing. It features 18-17mm eye relief and an adjustable rubber eyecup, perfect for glasses or direct use. Compatible with 1.25" and 2" barrels.

• SV215 zoom eyepiece is a good assistant for you to observe and take pictures of the planets; it is a good helper for the amateur astronomers to observe Venus; Mars; Jupiter; Saturn and so on
• Adjustable focal length; SV215 3 mm to 8mm zoom eyepiece equivalent to multiple eyepieces; SV215 eyepiece is much better than the kit eyepieces; this helps you to zoom in and out rather than changing lens
• Parfocal across the entire zoom range; minor tweaking may be necessary; you do not need to refocus every time you change the focal length
• Parfocal design for more efficient observation; SVBONY SV245 planetary zoom telescope eyepiece features a parfocal design; Parfocal across the entirezoom range; There is almost no need torefocus when changing magnification; significantly saving your observation time
• 63°wide field; covering mainstream needs with a 63° wide field; this zoom eyepiece delivers a perfect balance of portability and performance; Enjoy consistent; immersive views without losing field of view during zooming