Rangefinding

Rangefinding is important in any ballistic sport, but especially so in Field Target and Hunter Field Target.

Errors means misses

https://goodblokes.nz/range-estimation-basics-for-hunters-and-shooters/

Optical illusions:

higher than you : appears closer, lower: further

along a straight line/road/rows/ appear closer

in a tunnel: appear further

lit targets appear closer than poorly lit