[descriptive data] title US 4,338,001 Example 2 (Nikon AI Nikkor 180mm f/2.8 ED) [constants] Scaled 180 100 [variable distances] Focal Length 180 Angle of View 13.6 F-Number 2.8 Image Height 43.28 Total Length 172.26 // 0.957 * 180 Magnification 0 d0 Infinity Bf(p) undefined Bf 41.26 [lens data] 1 99.022 11.5 1.50032 64.94 81.9 2 -140.839 2.1 64.94 3 -138.056 3.7 1.7495 64.94 35 4 373.000 6.3 64.94 5 77.774 9.2 1.65844 61.00 50.8 6 239.999 58.1 61.00 6AS AS 16.4 31.503 6FS FS 16.4 24.94 7 -35.500 1.8 1.51454 31.36 54.6 8 -550.001 0.5 31.36 9 220.000 5.0 1.79668 31.36 45.4 10 -162.193 Bf 31.36 [figure] source Data/US004338001_Example02_Tale10-Fig1.png ppmm 5.169541985 originX 14 originY 193 [notes] Bill: This is the production lens.