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RVFM Double Concave Spherical Diameter 50mm, Fl 200mm
50mm Diameter Double Concave Spherical Lenses – RVFM PH30078/4, A double-concave spherical lens with a focal length of 200mm and a power of +5D. RVFM Double Concave Spherical Diameter 50mm, Fl 200mm
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