Eye piece lens description BarlowObjective lens diameter 1.25 inchesProduct dimensions 49D x 49W x 93H millimetresFocus type Fixed FocusItem Weight 89 Grams2X 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 nebulaWith 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 reproductionSimple 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 mirrorsDurable; 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