FLIR ThermaCAM E4 Operator's Manual page 65

10565003;1
Figure 13.13 Horizontal, vertical and instantaneous fields of view for certain distances to targets. D =
distance to target. 17 mm IR lens. Applies to detector type 247 only.
10563603;1
Figure 13.14 Horizontal, vertical and instantaneous fields of view for certain distances to targets. D =
distance to target. 9.2 mm IR lens. Applies to detector type 247 only.
Figure 13.15 F-number and close focus limits for various lenses
IR lens →
Close focus limit (m)
Close focus limit (ft.)
f-number
Publ. No. 1 558 017 Rev. a62 – ENGLISH (EN) – August 19, 2004
13.10 – Relationship between fields of view and distance
36 mm 17 mm
0.70 0.30
2.30 0.98
1.2 1.2
9.2 mm
0.01
0.03
1.2
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