
A rangefinder is one of the quickest and most efficient ways to get a yardage when out on the golf course. In the amateur game, they are completely legal but, when it comes to the professional game, they aren't allowed... sort of!
In 2021, The PGA of America announced that rangefinders would be allowed at the PGA Championship, claiming that they were being introduced to help with the 'flow of play' during the events. Along with the PGA Championship, The PGA of America also allows the use of rangefinders in its other Majors, including the Women's PGA Championship and Senior PGA Championship.