The SV215 zoom eyepiece adopts a nephocal design. No matter how you change the focal length you need to refocus. (But some adjustments may be required) SV215 zoom eyepiece is primarily suitable for medium to high end short-focus refractor telescopes, primarily used for high-magnification lunar and planetary observation
In the process of zooming from 3mm to 8mm, the SV215 Zoom Eyepiece shows a 56 degree constant field of view, which remains unchanged, giving the user a totally different experience when using the zoom eyepiece. At the same time, the exit pupil distance is 0.4 inches (10 mm). Length of tube connection: 36mm
For magnification adjustment, the SV215 continuous zoom eyepiece adopts a clickstop design. Click to stop at 3, 4, 5, 6, 7, 8mm to quickly change to accurate preset magnification
The SV215 zoom eyepiece consists of four 6 groups. Full multilayer coating provides excellent clarity, contrast and color correction
The SV215 zoom eyepiece is equipped with a foldable and removable environmental protection rubber eye mask and non-slip rubber protective ring. Safety undercut to fit securely into the eyepiece holder. The interface supports standard 1.25" filter installation
If you need to zoom in, rotate the zoom ring above the number. When rotated, the eyepiece will raise up