page 16/24
cfinder III – User Guide – 01/2017
5. System set-up and operation
5.1. Aligning the reflector sight to cfinder III using the internal target mark
1. mount the reflector sight to the NATO rail of cfinder III (Allen key, size 3 mm required)
2. remove the protective caps for the pan and tilt adjustment wheel of the reflector sight
3. activate a target mark by turning the rotary switch of the reflector sight
4. activate the alignment laser of cfinder III
5. turn the pan adjustment wheel (left/right) until the target mark matches the laser spot
projected by the alignment laser horizontally (flathead screwdriver required)
6. turn the tilt adjustment wheel (left/right) until the target mark matches the laser spot
projected by the alignment laser vertically (flathead screwdriver required)
7. replace on the protective caps for the pan and tilt adjustment wheel of the reflector sight
Note:
Projecting the alignment laser onto a target as far away as possible improves the alignment if tracking
far distance objects. Nevertheless, aligning onto a far distance target creates a small vertical parallax
between the target mark of the reflector sight and the actual position of the measuring laser spot of
approx. 6,5 cm (approx. 2.5 inches) in close distance.
Due to light conditions the laser spot of the alignment laser might not be visible in far distance. In order
to be independent of light conditions you can align the reflector sight using the sensor feedback of
cfinder III or cdistance (if available). (please refer to section 6.2.1. in this manual)
5.2. Mounting cfinder III on the camera
Common fastening tools can be used to mount cfinder III to the camera. Optional fastening tools are
available from cmotion.
• in order to avoid horizontal parallax, mount cfinder III centered along the optical axis, above
or below the camera lens.
• in order to minimize vertical parallax, mount cfinder III as close as possible to the lens
vertically
Note:
Minor horizontal or vertical offsets relative to the optical axis will not cause significant parallax hence
measurement precision. Nevertheless, parallax may cause issues when tracking a precise object from
far to close.
cfinder III can be mounted along the optical axis of the lens, behind or in front of the camera‘s sensor
plane. This offset can be compensated using the offset function in the systems menu.
Warning:
In order to allow smooth operation, the measuring laser should not be blocked by any camera
parts or accessories. Especially if you want to cover a range from far to close distance, we recommend
to mount cfinder III in line with the matte box.