Actually Swarovski created a very good focus mechanism on the NL lines. They are smooth, very sophisticated and advance (if and only if we get a good sample pair). If we have been in optics for a while we all know that Swarovski greaseless focus mechanism was not the smoothness one, however we talk about quality control issue here and try to get a good pair (without assembly quality control issues) when purchasing them! If you receive a pair and see that the focusser is not working properly then don't hesitate to send it back for exchange while you still can. Few issues could resolve by itself but many can't be corrected and usually getting worse over times. Example is the focusser on my NL 8x42. There is a loose gap on my NL 8x42 when you switch direction. I felt that right out of the box, but after a year using, it seems getting worse, I will send it in sometimes soon! The focussers on my NL 12x42 and 10x32 were perfect right out of the boxes and no issues.