Eye piece lens Barlow Objective lens diameter 1.25 inches Product dimensions 49D x 49W x 93H millimetres Focus type Fixed Focus Item Weight 89 Grams 2X magnification; 2X Barlow lens can increase 2X focal length; you can get more image details of planets; suitable for observation and photography of the moon; Jupiter; Saturn and nebula With M42X0.75mm thread; 2X Barlow lens with M42X0.75mm thread; you can successfully connect the camera to the telescope through a T-ring adapter (not included) Clear image; 2X Barlow lens with fully multi-coated pure optical glass lens for optimal image brightness; high contrast and true color reproduction Simple to use; just insert your 1.25" eyepiece into the Barlow lens and tighten the screw for planetary viewing Compatible with 1.25" eyepieces and zenith mirrors Durable; the 2X Barlow lens is made of metal material; which will not deform after long time use; and comes with two dust covers for easy carrying and storage