1920 Bausch and Lomb Optical Catalog Bausch and Lomb Catalog cover Bausch and Lomb Catalog Page 2 Table of Contents Introduction Page 5 Introduction Page 6 Introduction Page 7 Introduction Page 8 Terms Used in Describing Lenses Page 9 Terms Used in Describing Lenses Page 10 Terms Used in Describing Lenses Page 11 Terms Used in Describing Lenses Page 12 Terms Used in Describing Lenses Page 13 Terms Used in Describing Lenses Page 14 Terms Used in Describing Lenses Page 15 Terms Used in Describing Lenses Page 16 Terms Used in Describing Lenses Page 17 Terms Used in Describing Lenses Page 18 Terms Used in Describing Lenses Page 19 Terms Used in Describing Lenses Page 20 Catogue of Lenses Page 27 Bausch and Lomb Tessar IC F4.5 Page 28 Bausch and Lomb Tessar IC F4.5 Page 29 Bausch and Lomb Tessar IC F4.5 Page 30 Bausch and Lomb Tessar IC F4.5 Page 31 Bausch and Lomb Tessar IC F3.5 Page 32 Bausch and Lomb Tessar IIC F6.3 Page 33 Bausch and Lomb Tessar IIC F6.3 Page 34 Bausch and Lomb Tessar IIC F6.3 Page 35 Bausch and Lomb Protar VIIa Page 36 Bausch and Lomb Protar VIIa Page 37 Bausch and Lomb Protar VIIa Page 38 Bausch and Lomb Protar VIIa Page 39 Bausch and Lomb Protar VIIa Page 40 Bausch and Lomb Protar VIIa Page 41 Bausch and Lomb Protar VII in Sets Page 42 Bausch and Lomb Protar VII in Sets Page 43 Bausch and Lomb Protar IV F12.5 Page 44 Bausch and Lomb Protar V F18 Page 45 Bausch and Lomb Protar V F18 Page 46 Bausch and Lomb Process Anastigmat F10 Page 47 Bausch and Lomb Telephoto Attachment Page 48 Bausch and Lomb Telephoto Attachment Page 49 Bausch and Lomb Lens Coverage Tables Page 55 Bausch and Lomb Lens Coverage Tables Page 56 Bausch and Lomb Lens Coverage Tables Page 57 Bausch and Lomb Lens Coverage Tables Page 58 Bausch and Lomb Lens Coverage Tables Page 59 Bausch and Lomb Lens Coverage Tables Page 60 Bausch and Lomb Measurements Page 61