I have noticed the few times that I have used the F2 that the targets seem to be larger than they really are, example say you get a dime signal - as you pass the coil over the dime (still in the ground) you will get a signal with the outside of the coil not just the middle of the coil. When in pinpoint mode trying to "size" the target it also shows the target larger than it actually is. Seems that a coin will make the F2 beep at about 6 inches away in any direction. Steve.