as promised in a previous post, I finally got the time to prepare this little sample for you all to see, I think it might be of some interest...
100 % crop of the lower right corner:
The image was taken at ISO 50, f16 with a Rodenstock 28 HR, P65+ on a Bicam with Flexibellows and stitching sliding back adapter, and it's the result of stitching 3 images horizontally. Doing so, gets you way off the image circle of the 28HR; the full image above is basically all the usable area of the 28HR up until the image circle ends. The crop is a sample of the extreme limit of the possible usable area of the circle projected by the 28 HR... plus, you can see some pointed light sources in the crop, and the way the 28HR controls them. The noise you can see in the lowest corner of the crop it's probably due to the lifting of the vignette I had to do in PS - I am quite sure that using the center filter, when it will be available, will take care of this. I am quite happy with this lens sharpness to the extreme corners and with the way CA and aberrations are controlled - I'd say pretty impressive for a lens that wide