I have a slightly older Kowa TSN82SV, with angle ocular. It's big and relatively heavy, but good optics. .22 holes at 200 yards are easy. I also have Kowa TSN664 straight through view. I find the straight scope easier to acquire a target with, and use it mostly for casual shooting in the back yard, The big one usually goes to the rifle range, where I can set the tripod in front of a bench(not the shooting bench) and watch where my grandson is hitting. From a standing position the angled ocular is easier to use as the tripod can be shorter and more stable. Both scopes use the same eyepieces, I have a 20-60 as well as a 27x extended eye relief model that is better for use with my eyeglasses. the the 27x is sufficently powerful use for use at least to 250 yards, the longest our range has, and probably more. I had a 15-60 B&L Disoverer scope I gave to my grandson as I had problems with heat waves and mirage with it, I found as I got older I needed better quality optics vs high power, hence my use of the extended relieve eyepiece. I have never looked through a Swaro, leica or Ziess so cannnot make any comparison.