DNG is universal as you said, John, so forward and backwards compatibility is not an issue.

As someone who takes a lot of infrared images, I would say that if you want to shoot IR then get an IR converted camera, or use an IR filter on your existing camera. Anything else is a pale imitation.

Uploading an image to Myface or whatever social network you are using does not prove you took the photograph. Myface strips the exif information. If there is no metadata/exif then then there is no information on the image saying that so and so retains copyright. Anyone coming across (or looking for) said image uses the new legislation to imply that the image is an orphan as it has no information linking it to the person who took the photograph. The photographer then claims that by the fact that they uploaded the photograph, it indicates that they took it. The thief then says prove it. The photographer then has the option of instigating costly legal action (which under this new legislation is unlikely to succeed) or just accepting that they have been ripped off.
The photographer is screwed.

I'm hoping they now come out with a K mount module for the GXR....a 24mp APS-C module would be great.

Only just realised this is the same lens as the Samyang version, so one of those will do.....anyone selling one?

No thanks, Doug, the digits are the wrong way round.

I need 85mm, I've got a 50mm f1.4, and need something substantially longer. Unless you're selling it cheap?

The 16-45mm is a great lens for the price, I've no complaints with the one I have. It's not very fast though, if you want that.

I don't suppose anyone has one of these they are looking to sell?

There's an interesting bodge here for a 12-24mm lens that you may be able to adapt to your Sigma 8-16mm.

Otherwise, as you evidently like wide, the Sigma 10-20mm f3.5 might be worth investing in. The previously mentioned Sigma 24mm f2.8 Super-Wide II is an excellent lens too, but perhaps not as wide as you'd like.

120 GB SSD sounds a bit small, why not get 256GB? 8GB of DDR3 RAM should be enough, I have that and I've no problem with editing using Lightroom and CS6. If you want to do video editing it would be better to get more though.