Again with the Leica ...

So this is cute ...

But if you ask me, it completely misses the point.

You use the Leica M for two reasons:
1. To be able to use the lenses made for it by Leitz and Zeiss and a few others, or
2. To be quick and quiet and inconspicuous.

Of course, I've noted a third reason in the past: because its setup and design makes the photographic experience different than with, for example, a DSLR.

Now, why would you use the Petzval lens?  Well, primarily for the old-style effect.  It's very cool, and I wish I had one, but frankly, if it's all about the lens, it doesn't matter what the box it's attached to is. It's actually a design based on lenses made in the 19th Century for big view cameras. 

And thus, attaching a Petzval to a Leica M3 is pointless.  The Leica shutter and film plane are not any more special (except that the shutter is noted for its quiet) than any other camera.  As a matter of fact, with something as spooky in terms as focus as the Petzval, I think I'd much rather be able to back check my image through an SLR viewfinder.

So, really, what's the point?