Science › BI-CONCAVE LENS - 50MM DIA. FL: 50CM Image 1 of 1 BI-CONCAVE LENS - 50MM DIA. FL: 50CM $3.15 Code: PH0536L-CC1 Add To Cart Added! Code: PH0536L-CC1 High quality, optically true lenses. Made of high quality polished glass. Spherical with round edges. You Might Also Like Quick View LENS SET - 50MM DIA.IN STORAGE CONTAINER $119.00 Quick View BI-CONCAVE LENS - 50MM DIA. FL: 10CM $3.65 Quick View BI-CONCAVE LENS - 50MM DIA. FL: 20CM $3.35 Quick View ROUND BICONCAVE 50MM GLASS LENS - HIGH OPTICAL PURITY $22.50 Quick View ROUND BICONCAVE 50MM GLASS LENS-HIGH OPTICAL PURITY-14MM THICK $22.50