252Alvium USB Cameras User Guide V4.6.1
Lenses: Focal length vs. field of view
Alvium 1800 U-1236m/c
Values for 1800 U-1236m/c cameras with Type 1.1 (17.6 mm diagonal) sensors:
Alvium 1800 U-1240m/c
Values for 1800 U-1240m/c cameras with Type 1/1.7 (9.33 mm diagonal) sensors:
Focal length [mm]
Field of view (H × V in [mm])
Object distance = 500 mm Object distance = 1000 mm
8 872 × 638 1759 × 1287
12 577 × 422 1168 × 854
16 429 × 314 872 × 638
25 270 × 197 553 × 405
35 188 × 138 391 × 286
50 128 × 93 270 × 197
75 80 × 59 175 × 128
Table 134: Focal length versus field of view for Alvium 1800 U-1236m/c
Focal length [mm]
Field of view (H × V in [mm])
Object distance = 500 mm Object distance = 1000 mm
4.8 763 × 578 1534 × 1161
6 609 × 461 1226 × 928
8 455 × 344 918 × 694
12 301 × 228 609 × 461
16 224 × 169 455 × 344
25 141 × 106 289 ×218
35 98 × 74 204 × 154
50 67 × 50 141 × 106
Table 135: Focal length versus field of view for Alvium 1800 U-1240m/c
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