So I had this lens on my Silver K-5 last saturday. First time that I had a look at such a lens. Thanks for having this oppertunity.
These are a few quick pictures, so not for quality messurement.
Normal: Max shift on one side: Max shift to the other side:
You can also have les shift and also turn the lens and shift in a different angle, so here it is sideways, left right, but up or down or in an angle of 270 degrees (or another angle) is also possible. When you shift to its maximum you get a pretty hefty vignetting.
When I look at this then the 28mm isn't wide enough for APS-C. To be honest I think that even 18mm isn't very wide but giving allready hefty problem's (distortion) to solve in production. Making such a lens for APS-C is more expensive I think then making it for a full frame camera due to these lens correction's to give a nice and descent image that is distortion free.
So to me this makes sence that it is not a lens for APS-C. If there is no Full Frame camera in near future then this would be a lens for 645D.
How do you look at this?