Sat at the range today, and did more comparing. On my vari-x III 3.5-10x, its much more forgiving, and at 10x, I can dial the power down to 3.5 and be good to go, as many have said. Now my other vari-x III, a 4.5-14x AO, it wont, plain and simple. It always seemed more tempermental about eye placement, and today re-affirmed that. Now the Zeiss 3-9x, 4" of eye relief that doesnt change at all. God I hate that worthless simmons on the '06 that much more now,lol. Something like 2.8" or less