Who cares? It works for me, which is all that matters.
In regards to DR, did your read this [a href=\"http://luminous-landscape.com/forum/index.php?showtopic=22698&st=0]http://luminous-landscape.com/forum/index....opic=22698&st=0[/url]?
Do bear in mind that the ZD I had was a newer ZD and all newer ZDs seem to have this problem. Older ones like Quentin's sounds like not have same problem. Quentin?
To fully utilize a ZD it should be shot at low ISO, expose to right (effectively ISO50 becoming ISO25), lower than 5 sec exposure, and a DR that not include large areas of both light and dark. At least latter applies for newer ZDs until (& **IF ever**) Mamiya correct the newer ZDs. If they do correct it, then super.
Bit depth is not related to DR. Bit depth is the steps on the stair between the DR points, not how long the stair is (length=DR). As for the DR capability of the ZD compared to my now Aptus 65 there is a HUGE and CLEAR difference. ZD was noisy and indeed colored artifacts as I describe in above link, and that was not only my ZD. It was all ZDs that my agent tested, both back and camera. Read careful what I write there. Personally I would rather go with a 1Ds Mk III because it is much more flexible. However, I do like medium format so I caved in and paid for an Aptus 65. That gives much higher image quality than 1Ds Mk3, but a DSLR is perhaps more flexible. If we compare ISO, I do in extremes also use ISO 800 as useable. The trick is that due to the near 30MPs that the noise is small particles and you print the image not too large. The Aptus 65 has same identical image quality as Aptus 75, but was in my market (Hong Kong) due to its marginally more crop sensor priced slight lower priced than Aptus 22. Perhaps consider. There is a humongos difference in image quality. Aptus 65 & 75 are Leaf newer sensor technology, thus can last you long time. Or take a look at P30 which is PhaseOne's equivalent. As far as build quality of the AFDs, I current have a used AFD and plan to upgrade to AFDIII. I travel worldwide with my gear and the build is perfect fine.