Feature: for Industrial Microscope Camera C MOUNT Lens13/4inch (42mm) Mounting ThreadDoubling Total Magnification power of your Microscope and reduce the focus length: They are additional accessories that increase the working distance of the microscope or increase the magnification of the microscope. They provide clear images; they are suitable for optical monocular lenses with 42mm threaded interfaces. Suitable for video microscopy.: 2X magnification objective lens, the magnification is increased by 2 times and the working distance is reducedAuxiliary large objective lenses such as 2X are suitable for 10A monocular video microscopes.Magnification Power: 2.0XObjective Magnification Power by 0.7 4.5X (about 10 180X on the display, using 2.0X Barlow Lens about 2.45 360X on the display)Tips: The product may be updated constantly, The Actual Product May Have Slight Differences Or Color Differences the color and appearance may be changed, please don't mind. And take a consideration before place the order if you have request for color or appearance.Material: Metalcolour: BlackPackage Contents: 1 x monocular lensOnly the above package content, other products are not included.Note: Light reflection and different displays may cause the color of the item in the picture a little different from the real thing. The measurement allowed error is +/ 13cm.