Lenses: Focal length vs. field of view
98
Alvium USB Cameras User Guide V3.1.3
Type 1/2.5 = 7.1 mm diagonal
Values apply to
1800 U-500m/c and 1800 U-501NIR
cameras.
Type 1/2.9 = 6.3 mm diagonal
Values apply to 1
800 U-040m/c and U-158m/c
cameras.
Focal length [mm]
Field of view (H × V in mm)
Object distance = 500 mm
Object distance = 1000 mm
2.8
1013 × 759
2031 × 1523
3.6
786 × 590
1578 × 1184
4.8
588 × 441
1182 × 887
6
469 × 352
945 × 709
8
351 × 263
707 × 530
12
232 × 174
469 × 352
16
172 × 129
351 × 263
25
108 × 81
222 × 167
Table 45: Focal length versus field of view (type 1/2.5 sensor cameras)
Focal length [mm]
Field of view (H × V [mm])
Object distance = 500 mm
Object distance = 1000 mm
2.8
892 × 667
1789 × 1337
3.6
693 × 518
1390 × 1039
4.8
518 × 387
1041 × 778
6
414 × 309
832 × 622
8
309 × 231
623 × 465
12
204 × 153
414 × 309
16
152 × 114
309 × 231
25
95 × 71
196 × 146
Table 46: Focal length versus field of view (type 1/2.9 sensor cameras)
