Hi Oscar,
these (as well as most of the others in this thread) are actually very good. I do find the perspective a bit disorienting in some shots, and I think many of them would work just as well with a slightly wider lens. Judging how near I have to go to the subject to have format-filling persons, I think it might actually be easier with a wider lens, because it's less disorienting.
How much more extreme is the 5.6/12 in comparison with the 4.5/15? Is it telling that so far everybody is referring to the 15?
From playing around with the 4/21 for a couple of days, I notice it's a completely different approach to photography. I find myself scale focusing a lot more, making selective use of the large depth of field of the lens, and it's overall much faster, closer and more immediate. I am enjoying it very much.
It's interesting how a wide lens lends itself more to a rangefinder-style approach to photography where the camera is really more of an abstract intermediate tool that is used more selectively. Tomorrow there's a wedding, and I'm already looking forward to shooting there. So far most of my rangefinder photography would have been possible with a SLR as well, but with the wideangle I'm finally at a point where the rangefinder is really the only way to go.
The irony being, of course, that I am not really using the rangefinder itself all that much and scale focusing instead. A Bessa T starts to look reasonable. I wish the Bessa R had extra exposure LEDs at the top, too. I also wish the lens had click stops on the focusing ring at the hyperfocal distances for f16, f11 and f8, possibly f4 as well, something I would never have thought of before. Do the 4.5/15 or the 5.6/12 have these?
BTW What is "Kris' Tritoning method"?
Philipp