---------------------------------------------------------------- for 3.5 inch lens; critical (16x20) quality - based on H=2700 F/f ------------------------ for F-4 ------------------------------- focus(ft) far(inches) near(inches) DOF (in) 100 2438.7 795.7 1642.9 25 343.6 266.1 77.4 10 126.4 114.1 12.2 5 61.5 58.5 3.0 2 24.2 23.7 .4 ----------------------- for F-8 ------------------------------- focus(ft) far(inches) near(inches) DOF (in) 100 infinity 595.2 .... 25 402.1 239.2 162.8 10 133.5 108.9 24.6 5 63.2 57.0 6.1 2 24.4 23.5 .9 ----------------------- for F-16 ------------------------------ focus(ft) far(inches) near(inches) DOF (in) 100 infinity 395.8 .... 25 609.6 198.9 410.7 10 150.5 99.7 50.8 5 66.7 54.4 12.3 2 25.0 23.0 1.9 ----------------------- for F-32 ----------------------------- focus(ft) far(inches) near(inches) DOF (in) 100 infinity 236.9 .... 25 infinity 148.8 .... 10 202.1 85.3 116.8 5 75.2 49.8 25.4 2 26.1 22.1 3.9 ---------------------------------------------------------------- for 6 inch lens; critical (16x20) quality - based on H=2700 F/f ----------------------- for F-4 -------------------------------- focus(ft) far(inches) near(inches) DOF (in) 100 1705 925.7 779.5 25 324 279.3 44.6 10 123.6 116.5 7.1 5 60.9 59.1 1.7 2 24.1 23.8 .2 ----------------------- for F-8 ---------------------------------- focus(ft) far(inches) near(inches) DOF (in) 100 2945.4 753.4 2191.9 25 352.1 261.2 90.8 10 127.5 113.2 14.2 5 61.8 58.2 3.5 2 24.2 23.7 .5 ----------------------- for F-16 --------------------------------- focus(ft) far(inches) near(inches) DOF (in) 100 infinity 549.1 .... 25 426.3 231.4 194.8 10 136.1 107.2 28.8 5 63.7 56.6 7.1 2 24.5 23.4 1.1 ----------------------- for F-32 -------------------------------- focus(ft) far(inches) near(inches) DOF (in) 100 infinity 356.0 .... 25 736.3 188.3 547.9 10 157.2 97.0 60.2 5 68.0 53.6 14.4 2 25.1 22.9 2.2