SV188P 1.25" nosepiece fits telescopes with 1.25in focusers. Accepts standard 1.25” eyepieces, filters, Barlow lenses and other accessories with a 1.25" insert barrel.For more comfortable overhead viewing through refractor and Cassegrain type telescopes.Correct upside down and left right reversed image. It will look like trying to read a sign in a mirror. Suitable for space viewing, for there is NO upside down or right side up in space.1.25" 0.5x Focal Reducer for Telescope Eyepiece Photography and Observing. A wonderful tool for astrophotography telescopes: reduce exposure time and simplify astrophotography, suitable for shooting. Capture wider field of view, the focal reducer is good for visual use for a bigger FOV and is indispensable when CCD imaging. The case is made of metal, which better protects the product itself and prolongs its service life.