Hensoldt Zeiss 8x30 binoculars need info
- Thread starter delta1
- Start date
I haven't seen the binoculars but here's a general idea that may equip you to figure it out:
Simple ranging reticles are based on the idea that if you know the range to the object and the size of the reticle, you can calculate the size of the object, and if you know the size of the object and the size of the reticle you can calculate the range to the object. If you know any two, you can calculate the third, (so if you know the size of the object and the range to it, you can discover the size of the graduations in your reticle.)
If the binos you have were made for NATO forces, the standard is to use mils rather than degrees. Mils are smaller, thus allowing more accuracy. E.g. a circle is divided into 360 degrees, but 6,400 mils. For your range-finding purposes, you just need to remember that one mil subtends one metre at a range of one thousand metres. That means that if you are looking through an optical reticle that is graduated in mils, at an object known to be at 1000 metres range from you, then whatever occupies one of the one mil graduations of the reticle is one metre in width, or height. Thus you also know that if you look at an object known to be one metre in size, and if fits a one mil graduation in your reticle view, that object must be at 1000 metres range from you. And if you want to discover whether the reticle is graduated in mils, view an object know to be one metre in size at a known distance of 1000 metres and then if it fits a single graduation of your reticle, that reticle is in mils. (You could also put the one metre object at 500 metres range and it would appear twice as large, filling two graduations of one mil each, or at 100 metres range, where it would fill ten graduations of one mil each. )
Simple ranging reticles are based on the idea that if you know the range to the object and the size of the reticle, you can calculate the size of the object, and if you know the size of the object and the size of the reticle you can calculate the range to the object. If you know any two, you can calculate the third, (so if you know the size of the object and the range to it, you can discover the size of the graduations in your reticle.)
If the binos you have were made for NATO forces, the standard is to use mils rather than degrees. Mils are smaller, thus allowing more accuracy. E.g. a circle is divided into 360 degrees, but 6,400 mils. For your range-finding purposes, you just need to remember that one mil subtends one metre at a range of one thousand metres. That means that if you are looking through an optical reticle that is graduated in mils, at an object known to be at 1000 metres range from you, then whatever occupies one of the one mil graduations of the reticle is one metre in width, or height. Thus you also know that if you look at an object known to be one metre in size, and if fits a one mil graduation in your reticle view, that object must be at 1000 metres range from you. And if you want to discover whether the reticle is graduated in mils, view an object know to be one metre in size at a known distance of 1000 metres and then if it fits a single graduation of your reticle, that reticle is in mils. (You could also put the one metre object at 500 metres range and it would appear twice as large, filling two graduations of one mil each, or at 100 metres range, where it would fill ten graduations of one mil each. )
