https://www.flickr.com/photos/48733800@N06/albums/72157665925538734
Lens correction functions on distortion and vignetting, which are supported by the K-1 for the FA28, are disabled whilst for the DA35, it is not supported for any lens correction function in the FF mode of the K-1.
Well, how suitable are these lenses on the K-1 FF? Any how do they differ? I blog, you decide! :-)