Key specifications - Diameter: 100-360 mm - Focal length options: 70, 80, 100, 120, 150, 185, 200, 220 mm - Material: Optical Plastic - Magnification: 3x - Thickness: 2 mm - This lens is designed for use with plane magnifiers, solar energy concentrators, flashlight lamps, and stage lamps Benefits and features - Clear function: Provides 3x magnification in a compact 2 mm thick lens, suitable for enhancing projection, viewing, or focusing applications - Wide compatibility: The large diameter range and multiple focal length options enable use across diverse fixtures and setups - Lightweight and durable: Constructed from optical plastic for easy handling and practical performance - Professional design: Combines practical functionality with an attractive appearance, easy to carry and use Use scenarios - Solar energy concentrator: Focus sunlight more effectively on a target area to increase energy density for demonstrations or small-scale experiments - Stage lighting: Integrate with stage lamps to adjust beam focus and improve projection quality in performances - Plane magnifier or flashlight lamp: Use as a magnification element to view details or to help project a brighter, more focused beam in portable lighting setups