We know that rectangular achromats make great magnifiers and some are being used for 3d viewers but what are other uses where rectangular achromats work better than the traditional round ones? You get 2 each of our L1601 (Glass 37.3mm diameter by 28.7mm wide by 11.5mm thick cemented doublet achromat.. Has curved edges. 105mm focal length. Coated) and our L10762 (A glass 23.6 mm x 31.75 mm cemented doublet achromat, 80 mm focal length, 10 mm center thickness. Anti-reflection coated. Unused. Manufacturer's #4273)
