Now that the full-frame NEX appears very imminent, my curiosity is renewed. Here's what I've got: • Tokina RMC 17/3.5: was getting ready to sell this but then it occurred to me it would be really fun to try using this lens as intended (as an ultra-wide) • Nikkor AI 24/2.8: an holdover from my Nikon film days I've been aching to use once more as a true 24mm. The cropped corners are pretty solid, stopped down - I'm cautiously optimistic. • Leitz Summicron-R 35/2: this one is very special - the cleanest wide-open renderings I've ever experienced (at least in the center). So the Sony/Zeiss will only open to f/2.8? Fine by me - I got this thing! • Various 50mm - 55mm: as my vision boxes in with age, this "normal" angle becomes more and more relevant to me. Like most legacy lens aficionados, I already have too many to choose from. I expect most of them should work out just fine on full-frame. I may be tempted by the native offering, just to have one that is compact with AF. Or invest in a Leica Summicron of some sort. • Leitz Macro-Elmar 100/4: my current workhorse for product shots. Working distance and depth of field will be less generous but still sufficient. (Was doing fine with the 60mm macro, cropped 1.5x. That will probably get a lot less camera time on full-frame - except for the occasional product group shot.) A few predictions: • Certain wide angle rangefinder lenses that were problematic on APS-C will likely be more so on FF. • No announcement yet on sensor resolution. Many lenses may have trouble keeping up, and pixel peeping may get ugly if the sensor is well over 30MP. (OTOH, crop mode would be more useful. 36MP would be a nice compromise IMHO.) • I think the Leica macros will keep working splendidly for my product shooting. Out roaming for landscapes, there might be somewhat of an optical shakedown. (Already has been for crop - I use mostly e-mount now when I'm out & about.) I think the old glass will be fun for shooting people, though I may have to cash in a few nifty fifties and get an 85mm. What are your plans?