I use my A58 as a back-up when shooting my A77ii. Never liked that it had a plastic lens mount. I bought a LA-EA4 to use my A-mount lenses on my A7ii, but really don't do that very often since they crop down to 10MP or vignette badly. So, I was looking at that A58, and it occurred to me, I could swap out the lens mounts! Works perfectly! Nice tight fit on both! No focus issues, and it seems no sharpness issues either!