Question about Ranging 400 Rangefinder
I just ran across this one after many years of storage. Does anyone have access to a manual for it?
I just got one complete with manual and original box. It was not working, so I disassembled it and repaired the internal mechanism and recalibrated it for distance and vertical image coincidence.
Disassembly is easy (two screws at front and rear) and the "repair" for mine was to lubricate two pads that the mechanism rests on that were "sticky." I removed the mechanism, but that is not required -- just manual manipulation of the distancing arm should be sufficient to expose the lubrication points. Do not use 3-in-One or similar oil -- that thickens with time. Lacking the "proper" oil type, I would use a small drop of motor oil.
Calibration is simple -- use an object with a known distance that is about half the range of your unit. Adjust the "focus" knob to make the two images coincide (don't worry about vertical coincidence yet). Hold the thinner of the two distance adjuster knobs and turn the thicker one until the tape displaying the distance reads the actual distance to the known object. I would then adjust the image coincidence vertically by turning the screw on the bottom of the unit on the right (near the loop for a lanyard). It will be stiff! Turn it about a quarter of a turn and recheck vertical image coincidence -- if worse, turn it back the other direction a half-turn. Repeat with small turn increments until the images coincide vertically. Once that is done, recheck the distance calibration.
Posted on Sep 22, 2014
Usmc71 or doublebogey1, i just acquired a Ranging 50 and also need a manual could you email me a copy? firstname.lastname@example.org
Posted on Aug 14, 2010
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Posted on Jan 02, 2017
look through view finder and see the two images and turn wheel til it becomes one and then look at wheel to see the distance. this is a pretty accurate piece of equipment. classic range finder and will be worth some money someday if in good shape.
Posted on Nov 04, 2010
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