You may want to refer back to this to resolve any confusion later on. Take note of the direction of movement for each part from infinity to close focus. The diagram below shows the translation of the movement from the bed to the rangefinder.
Because the correct position of the bed for any given focus point varies from lens to lens a unique cam is used to ensure accurate calibration for every lens. In the Technika camera this movement is translated via a number of mechanical linkages to the mirror system of the rangefinder. Achieving focus on objects closer to us requires moving the lens away from the camera body. When a lens is mounted on a Technika at its correct infinity stop on the rail, and the rail is rolled back as far as it goes, any objects at infinity should be perfectly in focus on the ground glass. How does Rangefinder focusing on a Linhof Technika work? The angle of the cam raises the tip enough for the wheel to catch the tip of the cam. An angle of 5 – 10 degrees should be all that is needed. Holding it in a vice give it gentle pressure to angle the foot on the cam. Here the cam wheel is sliding over the top of the cam, and will jam if forced. If your wide angle lens is used with the dropped bed, you will also need to carefully observe that the wheel is catching the cam with the bed at its steep angle. You will want to repeatedly open and close the body, and extend and retract the bed to be sure that it is working consistently. Too much bend will cause the cam to catch the bed instead of the wheel. You will want to ensure that your cam is engaging comfortably. Many used cams will already have this bend. The solution to this problem is to bend your cam slightly at the base. This jams things up, and if you force it you might warp the cam. Longer cams may sit at a downward angle causing the wheel to miss the tip of the cam and slide over the top. Roll the bed forward, and then ease it back and observe how the wheel below the bed engages the cam. With the cam mounted, slide the front standard forward on its body mount just enough so the cam disengages and can move freely.
Use a lens spanner to loosen the lens ring, and tighten it with the lens in the right position if it was not.Īre the infinity stops both at correct position? If there is no hole for this screw to rest in, the lens will be tilted. Sometimes there is a screw in the shutter for stopping rotation. Number 3 size shutters tend to be centered on the light trap ring at the back of the board because they are so large.Įnsure that the lens sits flush. Some wide angle lenses were installed on recessed boards with the hole slightly higher if they are assumed to be used with a dropped bed. The hole is positioned lower on the board to compensate for the elevated position of the board in the body. Watch out for home made boards that may be missing the light trap. There are different types of original Linhof boards as well as lots of compatible boards by other brands (Toyo, Wista, Nikon and ‘nameless’), most of which are fine. don’t forget to glue the shim cover over the screw before reattaching the leather/leatherette.Īny lens needs to be on a good board. Test it by engaging and disengaging the arms. If you need to adjust this take care that you are adjusting both left and right equally.
The large slotted screw allows rotating of the part that engages the bed arm, which in turn adjusts the angle of the bed. Check if the bed sits at 90 degrees on both sides. Match left and right carefully, and tighten the set screws. Catch and release the arms a few times to be sure they are engaging well. Adjust the stud rotation until the bed is level. Loosen the screws behind the concentric studs. Lift part of the leather/leatherette hiding the set screws. These studs can be rotated to adjust the resting angle of the bed. The arms that hold the bed catches on two concentric studs inside the body. If the angle is not accurate, that will need to be corrected. Hold a triangle to the body on the left and right side, and verify the angle of the bed.
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