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THESE ARE HIGH QUALITY DOUBLE CONVEX / BIOCONVEX LENSES WITH OPTICALLY POLISHED FACES AND GROUND EDGES. THESE LENSES PROVIDE A WEALTH OF OPPORTUNITIES FOR LIGHT AND OPTICS EXPERIMENTS. CREATING A SIMPLE MAGNIFYING GLASS IS PROBABLY THE MOST COMMON APPLICATION. EACH LENS IS INDIVIDUALLY WRAPPED TO PROTECT THE SURFACE OF THE LENS.
45mm DIAMETER Lens has a focal length of 100mm, the outer edge is 3.2mm thick and the middle is 7.2mm thick and weighs approx 20g.
48mm DIAMETER Lens has a focal length of 105mm, the outer edge is 2.9mm thick and the middle is 7.3mm thick and weighs approx 21g.
65mm DIAMETER Lens has a focal length of 120mm, the outer edge is 2.5mm thick and the middle is 10mm thick and weighs approx 52g.
90mm DIAMETER Lens has a focal length of 200mm, the outer edge is 3mm thick and the middle is 13.5mm thick and weighs approx 116g.
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