SVBONY SV135 Zoom Eyepiece, Zoom 7 to 21mm 1.25 Inch Telescope Eyepiece, 6 Element 4 Group Telescope Accessories for Astronomic Telescopes Visual

Zoom from low to high power in an instant with SV135 versatile eyepiece <img alt="zoom eyepiece" src="https://m.media-amazon.com/images/S/aplus-media-library-service-media/6b0ed787-857f-4d49-ad45-9470cd952fed.__CR0,0,600,450_PT0_SX600_V1___.jpg"> 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! <img alt="zoom eyepiece" src="https://m.media-amazon.com/images/S/aplus-media-library-service-media/1a11b076-b766-44a9-b86b-fb0097e5982f.__CR0,0,800,600_PT0_SX800_V1___.png"> 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 Even wearing glasses to give you relaxing enjoyable viewing experience; More comfortable observation It also gives you a clear and bright angle of view while ensuring you get the magnification you need 1 18-16.3mm eye relief 2 40-57°Field of view 3 what you can observe <img alt="zoom eyepiece" src="https://m.media-amazon.com/images/S/aplus-media-library-service-media/36d14e62-e35f-42aa-b184-7b68ed40aa4b.__CR0,0,650,350_PT0_SX650_V1___.jpg"> 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 <img alt="zoom eyepiece" src="https://m.media-amazon.com/images/S/aplus-media-library-service-media/62095141-8cf1-4c95-b9f3-593e2e6d8bc1.__CR0,0,650,350_PT0_SX650_V1___.jpg"> Fully Multi Coated 6-Element 4-Group premium optical with FMC ultra high quality standard coating;It also ensures the transmission