Question about Fujinon Mariner WPC-XL Binocular
I have the Fujinon 7x50 Mariner binoculars with built-in compass. I no longer have the instructions. I forget exactly how to use the ranging reticle, should be something like dist = 1000 * (height / #marks), but I can't remember if there's another conversion factor or something. Also, no longer remember if the longer-shorter alternation in the size of the marks is for ease-of-use or for halves (are five marks "5" or "2.5").
Thanks in advance for your assistance.
How to use the reticle:
The vertical scale (reticle) visible through the left half of the binocular, above the compass display, allows you to calculate distance to an object if you know its height, or to calculate the height of an object if you know its distance from you.
Each mark on the vertical scale has a value of 5 MIL (1Mil is equivalent to an angel that can determined an object one meter in height at a distance of 1000 meters). Therefore, if a navigation chart gives the height of an object, by sighting on it and counting the number of MILS, you can determine how far away it is.
To Measuer distance when height is known:
Object Height(m)/Scale Reading x 1000m=Distance in Meters
To Measure height when distance is known:
Distance(m)xScale Reading/1000=Object height in meters
Posted on Mar 31, 2009
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Posted on Jan 02, 2017
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