Celestron Wedge with NexStar Evolution/SE, Black (93665) Equatorial WEDGE for Celestron nexstar 6/8sec and evolution alt-az mounted computerized telescopes Enables long exposure astrophotography and auto guiding by tilting the telescope azimuth into an Equatorial platform allowing it to track an arc around the Polar axis. For beginners to intermediate planetary and deep space Imagers Captive hardware, tool-less operation, easily adjusts under Load All new hefty yet portable design