Pentax-DA 560mm F5.6 ED AW
Full Frame Compatibility
The K-1 includes a second set of lens correction profiles for the 560mm when it is used in full-frame mode. These profiles can correct vignetting, chromatic aberrations, and distortion for full-frame images shot in JPEG mode. Still, Ricoh added a disclaimer that states "image quality is not guaranteed beyond the APS-C image area".
We tested the 560mm on film and found that wide open, there is visible falloff that varies in size based on the focus distance. Stopped down, the lens fares quite well. Read more about our tests in this article.
Additional tests using the Pentax K-1 will follow once it is released.