254Alvium USB Cameras User Guide V4.6.1
Lenses: Focal length vs. field of view
Alvium 1800 U-2040m/c
Values for 1800 U-2040m/c cameras with Type 1.1 (17.5 mm diagonal) sensors:
Alvium 1800 U-2050m/c
Values for 1800 U-2050m/c cameras with Type 1 (15.9 mm diagonal) sensors:
Focal length [mm]
Field of view (H × V in [mm])
Object distance = 500 mm Object distance = 1000 mm
6 1018 × 1018 2048 × 2048
8 760 × 760 1533 × 1533
12 503 × 503 1018 × 1018
16 374 × 374 760 × 760
25 235 × 235 482 × 482
35 164 × 164 341 × 341
50 111 × 111 235 × 235
75 70 × 70 152 × 152
85 60 × 60 133 × 133
Table 138: Focal length versus field of view for Alvium 1800 U-2040m/c
Focal length [mm]
Field of view (H × V in [mm])
Object distance = 500 mm Object distance = 1000 mm
8 811 × 542 1636 × 1093
12 536 × 358 1086 × 726
16 399 × 267 811 × 542
25 251 × 167 514 × 344
35 175 × 117 364 × 243
50 119 × 79 251 × 167
75 75 × 50 163 × 109
85 64 × 43 142 × 95
100 53 × 35 119 × 79
Table 139: Focal length versus field of view for Alvium 1800 U-2050m/c
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