FLIR ThermaCAM P20 - Figure 14.6 F-Number and Close Focus Limits for Various Lenses

m100.0050.0025.0010.005.001.20D →
ft.327.90164.0082.0032.8016.403.90D →
in.20.6510.315.162.061.030.25IFOV80°
Figure 14.6 F-number and close focus limits for various lenses
80°65°45°24°12°7°Lens →
0.150.20.10.31.24Close focus limit (m)
0.490.640.320.983.9313.11Close focus limit (ft.)
1.01.51.01.01.01.0f-number
14.10 – Relationship between fields of view and distance
Publ. No. 1 557 536 Rev. a35 – ENGLISH (EN) – January 20, 2004 71