Close, but no cigar: how to design mirrorless right The final sentence is really funny: So this is his list of requirements for the satisfyingly good mirrorless: Thats actually in quite some respects better than what you can get right now for DSLRs. Like - different grip sizes ? Awesome. Fast operation - can I say "duh" ? And half a second startup speed is my personal limit. Anything slower and you're getting in my way of getting the shot. Control locks - greatly appreciated. The Leica trick for exposure comp (first click activates, but does nothing otherwise) is a great idea, too. Also avoid buttons in too easy to accidentaly press areas (like the video record button with many Leicas). I want Auto-ISO like this: (a) configurable per lens (b) either fixed time or 1/focal length scale (c) second such scale for activated image stabilization (d) three quickly selectable modes: Full Auto-ISO, Auto-ISO but the shutter-speed-dial specifies a lower limit for shutter speed, Disabled Auto-ISO. Selecting T or B on the shutter speed dial will automatically disable Auto-ISO, as does selecting M on the mode dial (there is an A+S mode that doesnt disable Auto ISO). Fully articulated touchscreen fully used in the interface - hell yeah ! But all that can be done with touch screen needs to be doable with the regular four way button, too, though; just slower. Also allow to simply turn monitor completely around so its off. I primarily need good AF-C and if a mirrorless would manage that one, I would no longer need a DSLR. Thus I favor technology like Canon Dualpixel and/or Panasonic Bokeh-Analyzation. Combine that with great algorithms for tracking etc, please. There is no such thing as the perfect lens. There is no such thing as UHS-III, the fastest is UHS-II right now. Could also use one of these faster standards, like XQD. Definitely need two card slots with the ability to use the second as backup. I do ABSOLUTELY NOT want a battery solution like in the Leica T and SL. Thats poor for storing batteries and leads to all kinds of other problems. I'm missing WiFi in this list. Password protected and with all whisles and bells, like remote control, backup to the smartphone, automatic upload into the internet the moment I press the shutter release etc.