Prosilica GT Technical Manual V2.4.1
57
Camera dimensions
Image to infinity
Use a C-Mount compatible lens that allows an infinity focus. Set the lens to
infinity and image a distant object—10 to 15 m should suffice. Make sure the
lens is firmly threaded onto the C-Mount ring. Rotate the lens and C-Mount ring
until the image is focused. Carefully tighten the locking ring and recheck focus.
Lens protrusion for C-Mount cameras
Lens protrusion is the distance from outer edge of C-Mount ring to contact point
of first surface internal to C-Mount ring. For color cameras this surface is the IR-
filter holder, and for mono cameras this surface is the internal camera front
plate (see figure 44). Table 21 presents lens protrusion values for Prosilica GT
cameras with C-Mount.
Figure 44: Cross section of typical Prosilica GT front assembly with C-Mount
Camera
Lens protrusion [mm]
Camera
Lens protrusion [mm]
GT1290
13.64
GT2000
13.64
GT1290C
9.32
GT2000C
10.31
GT1380
13.64
GT2050
13.64
GT1380C
9.64
GT2050C
10.31
GT1600
13.64
GT2300
13.64
GT1600C
9.32
GT2300C
9.43
GT1660
13.64
GT2450
13.64
GT1660C
9.43
GT2450C
9.27
GT1910
13.64
GT2750
13.64
GT1910C
9.43
GT2750C
9.27
GT1920
13.64
GT3400
13.64
GT1920C
9.27
GT3400C
9.27
Table 21: Lens protrusion for Prosilica GT cameras with C-Mount
A
A
Front Plate
Lens protrusion
Section A-A for C-Mount
monochrome cameras
IR Cut filter
holder
Lens protrusion
Section A-A for C-Mount
color cameras
