Regarding the minimum focus distance the specs and the dial say 25 yards, but I have an Ares ETR and it will focus down to 10 yards or maybe even slightly below that at the bottom end of the mag range. If you need more than 4.5 power at 10 yards you must be shooting at pin heads

. Regarding the glass, it is not made in Japan, but the quality is quite good. It's not quite in the same league as my NF ATACR, Leupold Mark 5 or Minox ZP5, and not close to my ZCO, but in normal lighting conditions it's just behind everything but the ZCO. I would actually put the Burris XTR3, which is Japanese glass right there with the ATACR at half the price. I recently sold my XTR3, but only because I bought the ZCO and I wanted something lighter for my hunting rig. Personally, I prefer the Burris XTR3 over the Ares, but not by alot, and it is a bit more money. I've never been behind the Cronus, but I suspect it would be very similar to the XTR3. Another plus for the XTR is that other than the glass which comes from Light Optics, everything else is made in Fort Collins Colorado and it has a lifetime no questions asked warranty as does the Athlon.