Welcome to our store! 1. 0.5X Microscope Auxiliary Objective Lens, effectively enlarging the field of view. 2. Significantly increases the working distance up to 165mm. 3. Easy to attach to the objective lens, simply screw it on. 4. This lens comes with a 1-7/8" (48mm) mounting thread. 5. Doubles the magnification of the original lens, a very practical lens accessory. Features: 0.5X Microscope Auxiliary Objective Lens, effectively enlarging the field of view. Increases the working distance significantly up to 165mm. Easy to attach to the objective lens, just screw it on. This lens comes with a 1-7/8" (48mm) mounting thread. Doubles the magnification of the original lens, a very practical lens accessory. Specification: Material: Metal, Aluminum Alloy, Glass Lens Model: KP-0.5X Weight: 85g/3oz Magnification: 0.5X Microscope Objective Lens: 0.3 times Working Distance: 165mm Mounting Thread Size: 48mm/1.9in Package List: 1* 0.5X Auxiliary Lens Your 100% satisfaction is our top priority. We will provide you with the best service. If you find any problems after receiving the product, such as damage, incorrect quantity, etc., please contact us immediately and we will provide you with the best solution!