Remember that a LRF is a cone and isn’t a absolute distance at longer distances
“”
a laser rangefinder's beam can be described as a
very narrow, focused cone (or sometimes a rectangle, depending on the optics). It is not a single, infinitely thin point, nor is it a wide cone like an ultrasonic sensor's beam.
The spreading of the beam as it travels is called
beam divergence. Manufacturers of high-quality rangefinders aim for minimal divergence because:
- A smaller, more focused beam can pinpoint individual targets more precisely, even at long distances.
- It reduces the chance of the beam reflecting off an unintended object in the foreground (like a branch) or background, which would result in an inaccurate reading.
- It ensures more of the laser's energy reflects back to the device's receiver, improving performance and maximum range.
For context, a typical consumer laser rangefinder might have a beam divergence of around 1 to 2 milliradians (mrad). This means that at a distance of 1,000 meters (about 1,094 yards), the beam will be approximately 1 to 2 meters wide. ””
Also they should be ranged multiple times at different surfaces surrounding the actual target to get a good reading
1st time I used my Leica 1200’s I was WTF why am I getting so many different readings on this goat / pronghorn ( only about 300 meters after I finished the complete series of measurements