Question about Bushnell Marine 13-7500 (7x50) Binocular
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Posted on Jan 02, 2017
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
SOURCE: Binocular focus issue
you are right the prisms have probably shifted and it needs to be realigned, cost to realign for that model would cost about 35.00 plus shipping, if i can help any further please call 5088331232...larry
Posted on Jun 22, 2009
SOURCE: Carl Zeiss blc 7x50 binoculars
They were isued to the German army. My father bought a pair from a destitute soldier sitting on the wharf in Hamburg in 1945. I want to sell them now, but dont know what they are worth.
Posted on Dec 12, 2010
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