Will somebody with a little spare time research this sight and tell me why this is (or is not) a great idea. It looks like some kind of strange contraption, but they just might be onto something.

http://www.bowhunting.net/abc/sgf.html#top

Here's what they claim:

[font=arial,helvetica]"Just as the compound bow revolutionized archery[/size] through the use of wheels and cams, the ABC Pivotal Bowsight (the Pivotal Bowhunting Sight System) has revolutionized the tree stand sight. The ABC-2000 Pivotal Bow Sight's mechanical advantage is its patented ‘Pivotally Cammed Pin’, a second pivoting point that causes the sight pin to move and significantly increase your effective shooting range, with only one pin! The pin movement of an ABC-2000 Pivotal Bow Sight allows shooters to be accurate from as close as right under their stand on out to at least 40 yards! And through proper adjustment, some shooters using fast set up (higher speed bows) will achieve 60 & 70 yards from a single pin![/size][/size] "



Is there anything out there from an existing sight company using this concept? Looks like something pretty innovative.

Here's a quote (that was probably paid-for) - so add salt:
"I've used pendulum sights, and they usually keep arrows inside a deer's eight inch chest zone from a high stand with a fast bow. Much better, in my recent experience, is the ABC Pivotal Tree Sight now available at archery stores. This is more complex than a simple pendulum sight, and requires intelligent adjustment. But once calibrated, the single aiming pin pivots reliably as shooting angle changes.
This is truly a dead-on sight that instantly dopes distance and shooting angle. It's accurate on deer size targets out to an amazing 60 and 70 yards from a reasonably high tree stand...farther than most bowhunters feel comfortable shooting at big game."
[size=1]Chuck Adams - NRA Magazine "American Hunter" Bowhunting Equipment Q&A [January 1997 page 43]"