In my limited experience with different scopes, Simmons suck, period. The couple of tascos Ive used were mediocre. The two Leupolds I have on two of my magnums are clear. I have to say, the higher power of the two, 4.5-14x40mm is a tad more fickle with eye relief, to me, vs the 3.5-10x40 on the other gun. Both are the VARI-X III, the older ones. They arent as clear as a Swarovski I looked thru, but are both excellent scopes. I would like to play with a Zeiss and a Nikon to see how they stack sometime.