Upload & Sell: Off
On the one hand, this sounds really exciting.
But on the other... Let's say I'm a resolution junkie (because I am). I'm going to ignore bokeh and drawing style, which I know is not fair, but it's not what I'm interested in talking about right now. I want high resolution and high MTF and low CA. Imagine taking a really good lens that covers FF, say perhaps a Contax 50/1.7 used at moderate apertures.
Assume two contemporary sensors of identical quality (I know, not strictly possible, but bear with me) but different sizes: a hypothetical modern 24mp full-frame sensor and an equivalent-as-possible modern 24mp aps-C sensor in a mirrorless body. The point of this design is to make the image circle smaller, the detail finer, and the CA narrower. Yes? But then you'd be projecting it onto a sensor of proportionally-denser pixels and... everything would come out the same, yes? Except that the glass of the adapter would add some of its own distortions/abberation (no matter how high the quality or who the manufacturer is).
Am I understanding this correctly?
If so, it seems like the primary benefit is to photographers who already own a mirrorless APS-C or m4/3 body. For them, this new idea for adapters lets them use legacy lenses at something close to those lenses' focal length and quality.
Please (no sarcasm), enlighten me if I'm wrong.
You are completely right.
This doesn't make your 50/1.4 a 33/0.93, this makes that, on an APS, which is the same as a full frame 50/1.4.
This adapter is a bit puzling, you can buy an APS-C NEX + this adapter.
But when a FF NEX comes, then you can buy just the FF nex for the same price...
But this is real fun, imagine all the lenses you can try, EF lenses, and with adpters for EF mount!
Too bad they didn't made an Medium Format lens adapter to NEX!