Question about Ranging 400 Rangefinder

3 Answers

Ranging inc. model 50 rangefinder

I just ran across this one after many years of storage. Does anyone have access to a manual for it?

Posted by on

  • doublebogey1 Dec 22, 2008

    yes I still need a copy of the manual for the ranger 50 rangerfinder

  • doublebogey1 Dec 22, 2008

    e-mail me at and I will give you my address rather than put it out on the web.



3 Answers

  • Level 1:

    An expert who has achieved level 1.


    An expert whose answer got voted for 2 times.

    Problem Solver:

    An expert who has answered 5 questions.

  • Contributor
  • 7 Answers

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

  • Level 1:

    An expert who has achieved level 1.

  • Contributor
  • 2 Answers

Usmc71 or doublebogey1, i just acquired a Ranging 50 and also need a manual could you email me a copy?

Posted on Aug 14, 2010

  • Level 1:

    An expert who has achieved level 1.

  • Contributor
  • 2 Answers

I have one still in the box with manual. Do you still need one?

Posted on Dec 21, 2008

  • usmc71 Dec 22, 2008

    Give me a couple of days to get a copy made. What is your address?


  • usmc71 Dec 22, 2008

    I sent you an email, Bill.


2 Suggested Answers

  • 1 Answer

SOURCE: basic operation of the 50/2 mini rangefinder

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

  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

a 6ya expert can help you resolve that issue over the phone in a minute or two.
best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of (from cars to computers, handyman, and even drones).
click here to download the app (for users in the US for now) and get all the help you need.

Posted on Jan 02, 2017

Add Your Answer

Uploading: 0%


Complete. Click "Add" to insert your video. Add



Related Questions:

1 Answer

What year was it made if the serial number is: K51867


Year S/N
196990000 - 99999 >E1001
1975E83701 - E99999 01001E - 15000E
197615001E - 48300E
197748301E - 86200E
197886201E - 99998E >01001N & V01001
1980V88374 - V99999 >AL0101 - AL9999 >LA0101 - LA9999 >VA1001 - VA9256 >K01000
1983K99999 >T01001

Mar 27, 2015 | Optics

1 Answer

What is the year of manufacture for this gun that has a serial number "71377997"?

Google it, or contact the manufacturer directly.

A "good clue" is in the number itself. I would venture a guess that 1971 would be a likely date, possibly March (3rd month) 7th, and it was the 7,997th one produced.

Just a guess.

Contact the manufacturer.

Mar 07, 2015 | Optics

1 Answer

I have a hand gun made by Hopkins and Allen Arms and the serial number is 9491. I would like to know the year it was made. Thank you

You would have to know the model and variation. There are H&A collector's reference works that might tell you. Mid 1910s would be a good guess.

Feb 18, 2015 | Optics

1 Answer

I have a J P Sauer and Son 12 gauge shotgun, serial #182509. Can you tell me the year it was made?

The approximate age can be determined by what action it has. Sauer made a couple hundred different models.

Feb 14, 2015 | Optics

1 Answer

How do I find the manufacture date of my Walther .32 handgun. S/N 160404P

try this web site
click on the 'serial number/year of production link there
looks to me like is was made in 1940

Dec 30, 2014 | Optics

Not finding what you are looking for?
Ranging 400 Rangefinder Logo

Related Topics:

2,254 people viewed this question

Ask a Question

Usually answered in minutes!

Top Ranging Optics Experts


Level 3 Expert

101437 Answers

james laughton
james laughton

Level 3 Expert

1578 Answers

ray gallant

Level 3 Expert

40437 Answers

Are you a Ranging Optic Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides