Been lurking for years, getting ready to buy a 2010 el 8.5x42 swarovision. I love the field pros, but can’t justify the extra dough. I know about the focuser issues on the older models, but was wondering about other diffrences. Besides the obvious, some have mentioned increased rolling ball. This may be a problem, considering i do notice it in the newest pro model. Wish i could compare a new vs. old pair. So thats why i thought i’d ask u all. Should i b concerned. My gut tells me they are optically the same. At least i hope. Just for reference, ive owned 10x42 slc, zeiss victory 10x42 t fl, leica trinovid 8x42 and nikon monarch 8x42. Oh and the first pair was tasco world class 8x42. Thats my 20year binocular progression. I’ve decided the swaro 8.5’s are gonna b the bino to end all binos. Haha!