SVBONY Svbony SV135 Zoom Telescope Eyepiece, 1.25inch 7-21mm Zoom Eyepiece for Telescope, FMC 6 Element 4 Group Telescope Lens, Telescope Accessories for Planetary Moon Astronomy Observation

Zoom eyepiece; Focal length 7mm to 21mm stepless adjustment; Precise and sensitive adjustment of the magnification;fit for observing planetary, nebulae, clusters

Crisp image;6-elements in 4 groups and real FMC-green film increase the transmission of lights;internally blackened eyepiece barrel to avoid internal reflection

Comfortable;16.3mm-18mm eye relief fit for those people who wear glasses or not ;40°-57° wide field of view;40° field of view even in 7mm focal range

Zoom eyepiece 1.25in;standard 1.25in size fit for any 1.25in telescope and accessories;M28.5x0.6 thread can coonect with any 1.25in filter

Portable durable;Package with two covers and package box to protect your eyepiece and convenient to carry and storage