Svbony 10mm to 30mm 1.25inch Zoom Eyepiece Telescope Accessories Designed with a protective ring

Designed with a protective ring and blackened filter edges to prevent stray light

An OIII filter expands your imaging capabilities by allowing you to capture greenish/blueish structures

so as to reach the wall without serial number

Parfocal design: ensures no focal plane shift when switching filters

Svbony 10mm to 30mm 1.25inch Zoom Eyepiece Telescope Accessories Designed with a protective ringSvbony 10mm to 30mm 1. 25" Zoom Eyepiece 10mm 30mm zoom eyepiece Features: 1. SVBONY super wide angle 1. 25" 10mm 30mm zoom eyepiece. 2. The zoom eyepiece allows you to change magnification power without swapping out eyepieces. 3. 5 Elements 3 groups made of high index glass deliver sharp, high contrast vistas. 4. A simple twist of the zoom eyepiece housing changes the focal length from 30mm to 10mm, providing a variety of viewing magnification