JJ, with ref. to posts #311-312: As you have placed Swaro. EL at the extreme in the sharpness list it will be interesting to know where you place the SLC, should you get a chance to test one. A friend and I compared the two ~10 years back. He's a meticulous observer of binocular imagery (and of birds). His visual acuity and mine I reckoned were 20/12 and 20/15; the latter is common on BF. There were 1 SLC and 2 ELs, either, 8x42 and 8.5x42, or both models 10x42, afraid I cannot remember. It was in tropical daylight. Clear, a little, somewhat, cloudy -?-again, memory! Effective /apparent /functional sharpness in the open was no different to each of us. Within foliage in shade he could see more detail with the SLC, very slightly, but definitely. (I could not, or, not trying, or observant, enough, did not, see a difference.)