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; suitable for optical monocular lenses with 42mm threaded interfaces Suitable for video microscopy 0.3X reduction objective lens to increase working distance Auxiliary large objective lenses such as 0.3X are suitable for 10A monocular video microscopes Magnification Power: 0.3X Objective Magnification Power by 0.7 - 4.5X (approximately 10 - 180X on display, using 0.3X Barlow Lens approximately 2.45 - 360X on display) Note: Product may be updated periodically; 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 package content is included; other items are not included Note: Light reflection and different displays may cause the color of the item in the picture to differ slightly from the actual product. Measurement error allowance is +/- 1-3cm