With this 90-degree erecting prism transform your telescope into a telescope for nature observation with upright and left-right corrected image
This is a great diagonal for daytime terrestrial use and night time astronomy applications for telescopes or spotting scopes;filter thread for any 1.25 inch filter and accepts standard 1.25 inch eyepieces
Constructed from genuine optically processed BK7 glass; this product features a high-quality optical prism instead of a mirror ensuring clear and sharp image quality
1.25 inch Telescope Eyepiece set: Threaded for standard 1.25 inch astronomy filters telescopes and telescope accessories highly compatible; 8 mm 15 mm 40 mm 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