I just bought a Swarovski 20-60 x 80HD from a fne fellow CGNer. A buddy has a Zeiss Diascope 85 T SL with Vario Okular 20-60x eyepiece. Optics are both excellent can't make out any difference at 6am/no mirage or haze to worry about. The Swarovski has a mid body focus ring that is extremely easy to use with very little vibration at high magnification. The body and eyepiece are metal, with a screwed on threaded stainles base plate for the threaded metal base of the eyepiece, very easy to attach. The Zeiss is similar, but has a bayonet mount similar to cameras to attach the eypiece. The Zeiss has two focus nobs on top of the body (coarse and fine) that are smooth to operate but produce a little more vibration when useing. The Zeiss eypiece mounts are made of plastic, but my buddy seldom take off the eyepiece so it's not a problem for him, he says it's just to darned easy to lose and just to darned expensive to lose. The extra 5mm of objective glass doesn't make a bit of detectable difference to light transmission and they both transmit color incredibly well. I'm not trying to hijack your thread, just giveing you a first hand comparison. We also had the opportunity to check out a Burris Landmark at the same time, it to was a 20-60x80 and was 1/8 the price of the other two. Though the Burris was no slouch and definitely a screaming deal, it didn't perform as well as it's competitors. The test was an eye-opener for us and to tell the truth, if I were only useing the scopes for checking out targets, the Burris would be my pick, the color and light transmission just weren't quite as good in lower light. I'm going to have to save up some more cash to get a pair of Swarovski binos, It's kind of like target rifles, once you get used to tack drivers, 2inch groups though adequate, just don't cut it. Hope this helps your quest a little. bearhunter