Feature: Industrial Microscope Camera C-Mount Lens 1-3/4 inch (42mm) Mounting Thread Doubles total magnification power of your microscope and reduces focus length Additional accessory that increases working distance or magnification of the microscope Provides clear images; compatible with optical monocular lenses with 42mm threaded interfaces Suitable for video microscopy 0.3X reduction objective lens to increase working distance Auxiliary large objective lens such as 0.3X is suitable for 10A monocular video microscopes Magnification Power: 0.3X Objective Magnification Range: 0.7X - 4.5X (approximately 10X - 180X on display; with 0.3X Barlow Lens, approximately 2.45X - 360X on display) Note: Product may be subject to continuous updates; actual product may have slight differences in color or appearance. Please consider this before ordering if you have specific requirements regarding color or appearance Material: Metal Color: Black Package Contents: 1 x Monocular Lens Only the above items are included; other products are not included Note: Lighting and display differences may cause slight variations in color between the image and the actual item. Measurement error allowance: +/- 1-3 cm