Eliminate the need to make focus adjustments when changing telescope eyepieces
They are made of precision machined aluminium with black anodizing
This set of 3 Alstar Parfocal Rings lets you make a set of non-parfocal 1.25" telescope eyepieces parfocal for more efficient observing
1.25 inch Telescope Eyepiece set: Threaded for standard 1.25 inch astronomy filters telescopes and telescope accessories highly compatible; 6mm 12.5mm 32mm three kind of pass through apertures with a 2x 1.25 inch Barlow lens; a 2x 1.25 inch Barlow lens complements the included Plossl eyepieces to give you a total of six power combinations
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; 2x Power Lens features t-threads to attach a camera to your telescope with optional t-ring