I have the 25x80 steiner observer, I like them and I think it is ok glass .The con they are heavey .They have each eye focus, and then you just leave it alone, I dont remember the size of the lens on the eye piece off the top of my head pretty big though and lots of eye relief. I use to live in bullhead city and glassed alot of sheep in the blacks my buddy has the swarovskis and he liked mine as well I had a pair of 20x50 swarovskis and they just didn't fit my eyes right I guess I have goofy eyes so I sent them back and bought these.