Atersky 50,8mm Helical Focuser 50.8mm (2") Helical Focuser for visual and photographic use. The product features a nose piece diameter of 50,8mm (2"), when unscrewing the adapter it features a M48x0,75mm female thread. On the opposite side there is a M48x0,75mm male thread on which it's possible to directly attach a reflex camera (with T2 wide) or CCD. It's also possible to attach a 2" eypiece or a reducer (from M48 to T2). Rotation is easy and highly precise; in respect to other unbranded helical focusers the eyepiece holder does not rotate during focusing. The focus ring also features a millimeter-graduated scale and two locking knobs. Technical Specifications Length when closed: 92mm (without 2" nose piece: 57mm) Length when opened: 132,5mm (without 2" nose piece: 97,6mm) In the Box 50,8mm Helical Focuser Warranty & Manuals Artesky's warranty
