I must be the luckiest guy in the world. Never heard a good word on here about Tasco. I've got a Tasco World Class Plus 3.5X10X50. Been on my .270 for 7 years now. Since originaly sighting it in I've only had to adjust it twice. Each time 2 clicks was all it took.

Mauser, here is what Leupold says about parallax.
<BLOCKQUOTE id=quote<font size=1 face='Verdana, Arial, Helvetica' id=quote>quote:<hr height=1 noshade id=quote>What is parallax?

Parallax is essentially an optical illusion. It is the apparent movement of the target relative to the reticle when
you move your eye away from the center point of the eyepiece. It occurs when the target does not fall on the
same optical plane as the reticle.

Maximum parallax occurs when your eye is at the very edge of the exit pupil. (Even in this unlikely event, our
4x hunting scope focused for 150 yards has a maximum error of only 8/10ths of an inch at 500 yards.)

At short distances, the parallax effect does not affect accuracy. (Using the same 4x scope at 100 yards, the
maximum error is less than 2/10ths of an inch.) It is also good to remember that, as long you are sighting
straight through the middle of the scope, or close to it, parallax will have virtually no effect on accuracy in a
hunting situation. <hr height=1 noshade id=quote></BLOCKQUOTE id=quote></font id=quote><font face='Verdana, Arial, Helvetica' size=2 id=quote>