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– 3 –RM-K1
ADJUSTMENT OF FLANGE FOCAL LENGTH
e ange focal length is the distance from the ange (mounting surface) of a lens to the focal plane.
If the focal plane of the lens does not coincide with the image plane of the camera, the object will be out of focus
during a zoom operation. To prevent this from happening, the adjustment of the ange focal length is required. Make
sure to carry out the adjustment when installing the lens to a camera for the rst time or installing it to another
camera.
CONDITIONS OF OBJECT AND DIAPHRAGM
1. Object: cut “Siemens Star” o at the end of this manual and use it as an object
2.
Distance of Object: about 3 meters
3.
Diaphragm: open or as near to open as possible
Note. e depth of eld decreases by opening the aperture of the lens, and it becomes possible to focus on an object
more precisely. To precisely adjust the ange focal length, carefully adjust the focus as much as possible.
Flange
Focal Plane
Flange Focal Length