A lotfernrohr 7 (LF 7) is a type of German artillery range-finding telescope used during World War II. It was used to help artillery soldiers aim their guns more accurately towards their intended target.
The LF 7 is made up of different parts, including lenses and prisms, that work together to help calculate the distance between the gun and the target. Think of it like a super-duper magnifying glass that helps you see things really far away.
The gun crew would aim the instrument towards the target and look through the eyepiece to see an image of the target. They would then adjust the instrument to measure the angle between the gun and the target. With this angle, together with other measurements like the gun's elevation and the distance to the target, the gun crew could then use calculations to determine the exact direction and elevation needed for the gun to hit the target accurately.
The LF 7 was an important tool during World War II, as it allowed artillery soldiers to aim more accurately at their targets, increasing their chances of successfully hitting them.