1.25 inch Telescope Eyepiece set: Threaded for standard 1.25 inch astronomy filters telescopes and telescope accessories highly compatible; 4 mm 10 mm 20mm three kind of pass through apertures
Fully-Multicoated Achromatic Design: Featuring a 4-element Plossl optical design with an approximate 50-degree AFOV, perfect for broad field lunar observations; medium sized star clusters; provide a wide range of cloudy nebulas and deep sky targets
Wide Field of View : 1.25 Inch 4mm 10 mm 20 mm Plossl eyepiece offers a wide field of view and long eye relief ideal for high-precision astronomical observations
Locating Astronomical Objects More Easily: The Milky Way paints a broad white band across the sky; Somewhere up there are thousands and thousands of objects but how to find them easily in your telescope; This precisely is what the Alstar 6x30 finder scope is for
Large Field of View Plus Crosshairs: The Alstar finder scope gives you a wide field of view to make locating objects that much easier; They let you move the object exactly into the centre of the image which means it is also already accurately centred in the main telescope