I am no optical expert but I was able to compare the ATACR are to a Premier a couple days ago. the store also had 30 mm NXS. I was able to compare all 3 together. I ran them through their full range of magnification from 40 yards to about 250 YDS. I was very impressed with the ATACR. it was every bit as crisp as the Premier. and I consider Premier to be the top of all Tac scopes. I had no problem focusing up close as others have mentioned. Overall I was extremely impressed and would not hesitate to buy one.
as a side note I found the scope at 1shot gear in Denver. it's a great new shop they carry Sitka
let me know if you have any other questions