Features: Enhances s your microscopy with the RF4 Barlow Lens, featuring high light transmission visual glass for clear imaging and three magnification option (0.48, 0.5, 0.7) suitable for most microscopes and cameras. Crafted from strong aluminum alloy and accuracy engineered visual glass, this lens ensures long lasting performances and tool easy installation for hassle easy setup. Designed for researcher, educators, and photography enthusiasts seeking professional microscope accessories to enhances observation and documentation capabilities. Optimize specimen analysis in laboratories, classroom demonstrations, or high resolution microscopic photography projects requiring adjustable magnification and visual output. Engineered with anti scratch coatings and rigorously tested optics, this Barlow lens maintains consistent clear across extended use while seamlessly integrating with existing visual instruments. Specifications: Component : aluminum+glass Dimensions: about 48x48mm/1.89x1.89inch Type: 0.48/0.5/0.7 Package Includes: 1xMicroscope Lens note: 1.Please allow 1-2cm errors due to manual measurement, make sure that you do not mind before you order. 2.Due to the difference between different monitors, the picture may not reflect the actual color of the item.