Help to see the shadows in the craters and give improved definition of the surface of the Moon. Also helps with the problem of light pollution in area. In use the moon is easier to observe and does a good job of eliminating the street light smog from below our apartment in the city.
Fits for 2'' Focuser: Compatible with any eyepiece from 24mm to 38mm in diameter SUPER EASY TO USE: Only one big black screw on the back to fix your phone steadily; 360-Deg rotating phone holder fit for most cell phone width within 60-95mm, Vertical: 0-63mm; Horizontal : 60-95mm
Ideal to view lunar and planetary surface in detail Designed for telescope with 1.25" filter thread High quality coating to eliminate glaring and ghosting Reduce brightness of the moon and irradiation, increase contrast & definition and resolution