Allied Vision 12338, User Manual

Page: 17 / 20

Specifications
17 S-Mount Lenses User Guide V1.1.0
S-12-F2.8-5MP-T1-2.5
Lens position at infinity (approximately)
Table 15 defines values for the position of the lens when focused to infinity. We
recommend using a minimum thread engagement length of 1.0 mm (two 360
degree turns). Below this length, lens mounting is not stable enough.
Feature S-12-F2.8-5MP-T1-2.5 S-12-F2.8-5MP-T1-2.5-IRC
Product code 12346 12347
Camera mount S-Mount (M12 × 0.5)
Sensor size Type 1/2.5
Focal length 12 mm
Aperture (f/#) f/2.8
Supported pixel resolution 5 megapixels
Angle of view (diagonal) 33° with Type 1/2.5
Back focus 8.57 mm
IR correction type IR-optimized IR cut
Relative illumination >82.5%
Distortion <-1.75%
Dimensions (diameter × length) Ø 14 mm × 10.2 mm Ø 14 mm × 11.4 mm
Mass <10 g
Table 14: S-12-F2.8-5MP-T1-2.5 specifications
ID Component or distance type IR-optimized IR cut
1 Electronics component -
2 Sensor with cover glass -
a
Lens front to sensor
1
distance
17.5 mm
b Lens front to front flange distance 4.9 mm 5.6 mm
c
Flange focal distance (optical)
1 12.6 mm
d Thread engagement length 5.0 mm
e Lens back to sensor distance 7.6 mm
f
Lens thread end to sensor
1
distance
7.6 mm
1
Optical distance measured to the active sensor surface,
disregarding microlenses and cover glass.
Table 15: S-12-F2.8-5MP-T1-2.5 lens position at infinity (with schematic drawing)
a
1
2
c b
d e
f
Lens