For what last time I mentioned about and intended to do, the following samples were taken and are now posted. Just browse the album below, full-size original samples are available per picture page:
http://smg.photobucket.com/user/RiceHigh/library/5Ds/FA645_120F4Macro?sort=9&page=1
(Or, you can view a quick Slideshow Here.)
All pictures were taken with direct JPEG out of the camera in best quality, hand-held, manual focused, aperture values were set in between f/5.6 to f/8, most at ISO 100.
Actually, I am satisfied with the Image Quality produced by the combo including the Colour Rendition. If you want to compare those pictures of mine against what you can get with the same model of lens on a 1.3X 645D (Mine is in 1.6X, when compared to the 6 x 4.5cm format), you can see the following earlier reviews by the others:
1. A User Review with Full Samples at the Japanese DC Watch. Some of the shooting subjects are quite similar to those of mine:
http://dc.watch.impress.co.jp/docs/review/labo/20110606_450161.html
(in Japanese, but viewing the pictures with foot notes are all self-explanatory.)
2. A Brick Wall Measurbation Test with the lens on 645D, at f/4 wide-opened, f/8, f/11 and f/32. The centre crops are posted:
http://dbphoto.net/blog/?p=124
Enjoy! :-)