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Alvium USB Cameras User Guide V3.6.4
Lenses: Focal length vs. field of view
About S-Mount lenses
Alvium S-Mount models have no filter. For typical applications, we recommend
using S-Mount lenses with an integrated IR cut filter for a better image quality.
Read
Mounting and focusing S-Mount lenses
on page 191 to avoid damage when
using S-Mount lenses.
Focal length vs. field of view
Alvium 1800 U-030 VSWIR
Values for 1800 U-030 VSWIR cameras with Type 1/4 (4.1 mm diagonal) sensors:
Focal length [mm]
Field of view (H × V [mm])
Object distance = 500 mm
Object distance = 1000 mm
4
407 × 322
817 × 647
5
775 × 773
1557 × 1553
6
644 × 642
1296 × 1293
8
481 × 480
970 × 968
12
318 × 317
644 × 642
16
237 × 236
481 × 480
25
149 × 148
305 × 304
35
104 × 104
216 × 215
50
70 × 70
149 × 148
Table 77: Focal length versus field of view for Alvium 1800 U-030 VSWIR
