StarField 5 X 1.25" Ultra Thin High Speed Motorized Filter Wheel - FW5125V4HS Smartphone Accessories and longer eye-relief

and longer eye-relief

yet provide diffraction-limited performance

and a ClickStop-Action is the ideal Zoom eyepiece for spotting scopes with interchangeable eyepieces

high res optical encoders on both axes instead of just one

StarField 5 X 1.25" Ultra Thin High Speed Motorized Filter Wheel - FW5125V4HS Smartphone Accessories and longer eye-reliefThe StarField High Speed Ultra Thin Motorized 5 Position 1. 25" Filter Wheel is only 19 mm thick and weighs just 8. 7 ounces, or 248 grams! Due to its diminutive size, this StarField filter wheel only adds 19 mm of back focus when used with StarField adapters. Because this is the High Speed version, the StarField FW5125V4HS achieves carousel rotation speeds that are more than 5 times faster than the FW5125V4. The filter wheel is USB controlled and