I am trying to find out at what height and distance. From a treestand do your sight pens change. Some say if you are 15 feet in a tree and a deer is 20 yards out. You need to aim low at 20 yards.

honestly think a lot depends on your draw weight and bow speed. i've been told that the newer bows are so fast, the deviation is almost irrelevent. a pendulum site should take care of the elevation issues. i use an even easier solution: my bow's old and slow soi sight-in from the stand tobe sure.

I put a stand up in my back yard today. 15 ft off the ground shooting a 3D deer target at 30yds. I aimed at the vitals and had good results. Keep in mind that you must bend at the waist and not drop your bow arm.

15' up and 20' out is almost level. Burn a whole in it with the pin and let it fly. Dead deer.

Aim dead on and thru.

Man, this can get complicated, but let's keep it simple. Line of sight distance from a tree isn't "actual yardage." The correct yardage is from the base of the tree to your target. I don't know all the physics involved, but it's got to do w/ that triangle thing.

BUT, the single most reason people shoot high out of a treestand is this. They drop their bowarm to get on target instead of bending at the waist.

Best thing to do is take your target with you and shoot a few just to make sure. Here's a good link from Chuck [link]http://www.bowhunting.net/abc/elevated.html[/link]

Take your height off the ground (treestand height) square that, take the length to the deer from the base of the treestand, square that, add the two numbers together, and that equals the actaul distance from you to the deer squared, you will need to find the square root from that, and then u have the measurement in whatever unit of measurement you used., I dunno if being higher up in the airmakes the arrow drop anymore or what not, but thats the formula you use for pythagorean theorem (A^2+B^2=C^2), and it is for the hypotenuse of a triangle, which is exactly the same thing as the triangle your treestand, deer, and distance on the ground makes up. I could be wrong, but I tried to remember all that off the top of my head so don't mark me by my words.