200mm large diameter with -350mm focal length, ideal for wide-field magnification, projection experiments, and optical bench setups. Precision-machined acrylic material delivers 93% light transmission, ensuring bright, clear imaging for LED collimation and visual aids. Threaded edge devise allows secure mounting into standard lens holders or custom frames, simplifying integration into optical systems. Ultra-lightweight at only 65g and 2mm thick, reducing structural load while maintaining durable, shatter-resistant performance. Versatile concave Fresnel profile suits science education, DIY projectors, solar concentration tests, and photography light modifiers.
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