Hasselblad not mentioned but I thought this article on diffraction was a good read:
http://www.cambridgeincolour.com/tutorials/diffraction-photography.htm
They've got a diffraction calculator on Photopills site that list some of the pre CMOS Hasselblad models (nb I haven't tested it thoroughly through though yet)
http://www.photopills.com/calculators/diffraction
After reading that article, I had my Anti Aliasing filter and Color Filter Array removed a couple of years back from my Canon 5D MKI which had little diffraction to begin with in the first place, which only set in at f16 upwards due to the large pixel size of 8.2 µm.
Now my sensor is not only sharper (and shots B&W only), but also, I am able to push my lenses and stop down at much bigger numbers than I could have before.
It is why you see writers claiming more sharpness with no AA filters on sensors which is really layman's term for all the extra F stops that are available to you due to the absence of the Airy disc effect.