Anyone using manual focus lenses with the Panasonic S1/S1R?

Sjak wrote:

Tom, I have one more question about the EF-L-adapters. Do you know how accurate the focal flange distance is on these?

I don't think it really matters that much.  If anything adapters tend to be slightly short so that wideangle lenses can be guaranteed to reach infinity.  The Canon TS-E lenses can focus beyond infinity and you can't focus using the focus scale if you're using any tilt at all, for obvious reasons.

The reason for asking is that I will probably also get a wide shift and standard T/S-lens, either from Laowa or from Canon. But even in case of a Laowa, the EF-mount seems the better investment, as it could be adapted to potential future cameras, whereas in L-mount it could prove a tough resell.

I don't think Laowa do any tilt lenses yet. The 15mm and 20mm shift lenses come in a variety of mounts, but I would definitely buy one in an SLR mount rather than a mirrorless version.  Nikon F might be even more attractive, being almost universally adaptable.  Partly it's the resale argument, but the RF-EF filter adapter is attractive too. Now that there are a couple of third-party RF-EF filter adapters we can hope it's only a matter of time before people start putting filter slots into other DSLR to mirrorless mount adapters.