Absoutely. Of course these are just "loose" comparisons since they don't account for complexity etc... but here's a similar comparison when you can design around a smaller image circle: EM5 45/1.8, EM5 75mm f/1.8 (just for kickers), D3300 85mm f/1.4 Compact Camera Meter Of course, I'm not saying that one, FF, APS, or MFT, is better but certainly there are certain things at play here when it comes to size. A lens that is both designed for FF with AF is going to be large. Make it a faster lens and it will only get larger. Me, a A7R + M adapter + M lens (FF no AF of course) seems to be within size that I'm willing to deal with... so its certainly got my curiosity. One thing is for sure, Olympus and Panasonic have demonstrated how well a smaller image circle can translate to nice small packages.