Recently, I was able to compare the STS80 HD with 20-60x eyepiece to the Leica Apo Televid 77 with 20-60x eyepiece, Leica Apo Televid 82 with 25-50x ASPH eyepiece, Nikon EDG 85 A with 20-60x eyepiece and the Nikon ED82 with 25-56x eyepiece. The clear winner in optical performance is the STS80 HD, followed by the EDG 85. Both were sharp up to 60x!! To my eyes, the field of view was a bit smaler in the Swaro, but the view was slightly better. The worst in the test was the older Televid, becaue of some optical disorders after 40x. The new Apo Televid 82 dropped dramatically in image quality in twilight, but at daylight the wide and extremely flat field of view was impressive. I think for the Nikon ED82 the 25-56x isn't the best choice, because of the smale field of view. The image quality was really nice. My favorite is the EDG 85 because of the FSA-L2 zoom adapter for my CANON camera. If anyone is intersted in more information, no problem, questions are welcome! Regards Sebastian