Product description
Zoom from low to high power in an instant with SV135 versatile eyepiece
SV135 fully multi-coated zoom plossl eyepiece zooms to any focal length between 7 mm and 21 mm - pick the better magnification for your subject. As a beginner; SV135 zoom eyepiece is good for starter astronomer!
7mm-21mm linear continuous zoom
Regarding the zoom action; it is stiff enough that you won't accidentally shift focal lengths; but it is also smooth enough that you can rotate it without holding the base of the eyepiece with your other hand
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Even wearing glasses to give you relaxing enjoyable viewing experience; More comfortable observation
M28.5*0.6 filter thread
SV135 zoom eyepiece has M28.5*0.6 threads on the bottom very convenient for connecting filter;Works great for photography
Fully Multi Coated
6-Element 4-Group premium optical with FMC ultra high quality standard coating;It also ensures the transmission of light up to 97% while reducing the loss of light during transmission