Plain and simple... The 5x33L model specifically is nearly as yellow as looking through a scope with those cheap scope covers on that come with some rifles that have the yellow plastic lens on one end and clear plastic on the other.
I owned a 5x33LU, and it wasn't bad, but it was heavy. I sold it.
Later, I thought "well, I won't mind a heavy scope on this rifle", so I bought a 5x33L on the EE. YELLOW! Condition was not as advertised either, so I sent it back to the guy for a refund.
The ATN scopes also seem to be painted with cheap truck bed paint. The rings cut into the finish and then it starts to peel.
Do yourself a favor, and don't buy one. If you do, you WILL regret it. Get the IOR. It's shorter, lighter, clearer, brighter, and the resale value is a lot better. You can buy a brand new ATN for $200, but you can barely get $100 out of it when you try to sell it on the EE. An IOR on the other hand can be bought for $333.50 from Mike @ CS Gunworks (above) and if you don't like it, you can sell it for $275 - $300.