Steve,
Oh, I think an IQ4150 and a 40mm HR would be a good start.
Seriously, I had the XCD 30 for a year and had only 2 real keepers with it. Not through any fault of the lens, but only my preference in focal lengths. When rebuilding my X system, I skipped the 30. I wish I'd tried the 45P, instead I went with my good previous experience with the 45/3.5. The 21/4 is, of course, unique, and I'm very sad that HB killed it. If a P lens between 20mm and 24mm replaces it, though ... Well, we'll see.
Matt
Oh,
now you're talking!
But actually, the Rodenstock HR lenses are not the
sharpest lenses in the world; they are very sharp, but their truly unique aspect, something they certainly do better than any other lens, is provide a very large image circle, and allow you to shift within that image circle to extreme degrees and maintain that sharpness. No other lenses do that at the same level.
When you have a look at the 55V and 28P MTF curves, they are very similar. I use the 55V every day (it's my favorite lens), and, frankly speaking, I can hardly see any difference in sharpness between the edges and the center. So, wait and see, and I am eager to get the first feedbacks about the 28P in the field. The only thing I am a little surprised about the 28P is that the sharpness and contrast at the center are worst at f/8 than at f/4.
Yes, similar to the Schneider-Kreuznach 55mm Blue Ring lens (and preceding 55mm Silver Ring) for Phase One, the curves are similar to that lens as well, and that lens has been called (outside of the legacy 28mm) the worst lens in the lineup. And yet I have shot with it so many times, and never felt the results were lacking in any way. So a lot about the way a lens performs is how you use it. And that was my point about the 30mm and (potentially) the 28mm.
Also, the thing about Phase One and Fuji and Hasselblad is that they do not make multiple grades of lenses for the same camera system, as 35mm manufacturers do. They make one set of lenses for medium format, and there are no turkeys in these lineups, there are only differences, and the differences for the most part are minute.
Interestingly,
most of the MTF charts for the XCD lens lineup display less contrast and resolution stopped down vs wide open. It is how many modern lenses have been designed these days (not sure about older designs). However, it's often not noticeable, because as that depth of field increases, our eyes view the image differently, and we often perceive the entire image as sharper.
Steve Hendrix/CI