RE: pendulum sight question
Pendulum sights are dependant on the speed of your bow. With a average hunting set up, a pendulum sight will allow you to shoot from ground zero to about 30 yards with no hold over. Just aim as you normally would and execute the shot. I've used a pendulum sight with great results at those ranges, shooting from an average height of 25 feet with a hunting set up that was sending the arrow out at 262 fps.
Faster bows would obviously allow for more yardage to the target without the need of sight adjustment.
Trophy Ridge makes a very good pendulum sight that can be locked in place, without tools, for level ground shooting. This same sight can be moved with the X-drive knob, again without tools, to any yardage you specify. A pointed indexer faces the archer on the vertical plane and adjustments are solid. All machined aluminum surrounds a bright fiber optic single pin within its round aperature. Not at all noisy like some others I've tried. All in all it's a real nice rig.