Back in the 70's I bought a rangeing 20 20 range finder that was good out to 40 yards for bow hunting. It worked on the principal of focusing the picture, was ok to pick out objects in the shooting lanes and remembering the yardage.

Couple years ago I bought a Simmons which was on sale for Christmas for 100.00. I use it pretty much the same way find yardages to objects from my hunting blinds and remembering them.
I do carry it when coyote hunting as most sets are not done in the same places but getting ranges and remembering them is still in the repertory.

Al