The following illustrations show the tolerance margins of the sensor position relative to the outer camera housing. A maximum error in all directions (rotation, translation) cannot occur at the same time.

Fig. 591: Position accuracy of the sensor (1)

Fig. 592: Position accuracy of the sensor (2)

It cannot be guaranteed that the sensor cover glass or filter glass are absolutely parallel to each other.

C-mount lenses can also be subject to inaccuracies of the flange back distance. The tolerance usually is ±0.05 mm. In some cases, however, the inaccuracies of camera and lens might add up, resulting in a total error > 0.05 mm.