- Material: Glass. Double concave lens. - Diameter options: 40.5 mm; 42 mm; 43 mm; 50 mm; 52 mm; 56 mm (optional) - Focal length options: -30 mm; -40 mm; -50 mm; -95 mm; -100 mm; -123 mm (optional) - Use and compatibility: A high quality microscope accessory with exquisite workmanship. Suitable for use with a wide range of microscopes. Designed for durability and stable performance. Key benefits - Versatile compatibility: Multiple diameter and focal length options to match different microscope models and configurations. - High quality material: Glass construction for clarity and long lasting use. - Reliable performance: Double concave lens design provides stable optical characteristics when integrated into microscope setups. - Precision workmanship: Built to fit accurately and maintain alignment within standard microscope accessories. - Easy integration: Simple to install as part of common microscope configurations; no complex modification required. Practical use scenarios - Educational laboratories: Use with student microscopes to explore samples at different magnifications by selecting the appropriate diameter and focal length. - Research and clinical settings: Adjust for varying specimen thickness, enabling clearer viewing of slides with different topographies. - Field work and hobbyist applications: Durable accessories for portable or bench microscopes, improving reliability in demanding environments.