2" BDS-RT Baader Diamond Steeltrack Focuser

Description 2" BDS-RT Baader Diamond Steeltrack® Focuser Baader Planetarium's 2" Refractor Diamond Steeltrack Focuser gives refractors a full 3" (76mm) of velvety smooth focusing travel. Easily adaptable to popular refractors. Overall length fully retracted 80mm (backfocus length). Drawtube is fully internally baffled and blackened to eliminate off-axis stray light. 72mm dovetail receiver permits 360degree rotation of focuser with single-screw locking. Optional adapters available to fit a variety of other refractors. All Baader Diamond Steeltrack (BDS) Focusers have the following specifications: Drive System True diamonds form a micro-geared high precision drive system never accomplished before In comparison to conventional crayford or rack & pinion drives, this micro-geared movement has zero backlash, zero cogging, and zero flexure Diamond Steeltrack 2" focusers lift a payload of 6kg (13 lbs) straight up, without slipping, without excessive bearing preload (bearing preload c