Astro-Physics/USA 4" focuser from 206 mm EDF Apo ; for tube side outer diameter 137 mm ; focusing distance 105 mm ; 56 mm bayonet extension with 109 mm diameter , adapter 109 mm to 2" female connector with 46 mm length ; minimum length fully retracted without extension 210 mm ; maximum length fully extended 370 mm , complete weight 4739 grams

Item condition: used Item with possible small cosmetic deffect, but every function works perfect