But some points had to be made.
Thisis definitely NOT the widely available 16 MP IMX071 sensor found in Pentax k-5, nikon d7000, Nikon d5100. See the dissassembly of or the marketing materials from Nikon.
Maybe it is a newer sensor made from Sony, but not the one found in K5 for sure.
Very likely the K-01. It is the newest APS-C Pentax, right? I see that I interchanged K5 for K-01 from one paragraph to the next, which was unintentional. Sorry for the confusion. Of your two pictures, the K-01 is the unit in the Fujifilm cameras. (K5 has symmetrical traces on the opposite long sides, K-01 is completely different and distinctive.)
One must assume the most current CMOS APS-C specification was used, which appears to be the same pressing as the K-01, if not identical. The most interesting insight lays in thinking about the new sensor in the X100S. This sensor family is obviously under constant evolution. It is safe to say from the X100S that we see what will be coming to the X-Pro1 and X-E1. When or if yet more improvements we do not know.
Regarding Toshiba's current position in the mainstream CMOS sensor business the following past announcements from Sony Corporation are significant:
(Sale of major CMOS factory to Sony from Toshiba)
(Prior announcement of 2x increase in Sony CMOS manufacturing capability. (Just about time for the K-01 and X-Pro1 to go into final design stage ???)
These two announcements are just so may tea leaves in the bottom of a cup, but indicate, based on the prevalence of Sony "plain vanilla"16mp sensors in the market place today, that Sony has taken the manufacturing lead in mainstream, APS-C sensors. The Sony/Toshiba related article stated Toshiba was looking to future markets and wanted out of a large wafer foundry in order to concentrate on newer, faster paced development of specialized products. Take a read for a feeling of what is going on here. See also my comments below.
The camera manufactures step into and out of the line for the various iterations of a sensor family as time goes forward. Usually, a new sensor involves a new camera with added features and a new body shape. External body features are sometimes not so much market driven, but marketing department driven. That does not seem to be the way Fijifilm thinks about design. It is to their credit and one of the attractive aspects of their image. "Different only because it is better", might be a fitting moniker to their design philosophy.
That said, there is a lead time to integrating new features into firmware and camera software that varies between camera models and their manufactures. It may be that Fujifilm is vigorously pushing the X100S setup into the X-Pro1 and/or X-E1 or they may have yet another iteration of firmware/software in mind based on yet a different sensor evolution.
It is interesting to note that Sony uses a "Flagship"24mp APS-C, and currently seems to offer only 16mp to outside companies. More interesting is that in the X100S we have an improved APS-C 16mp sensor that must have been recently developed, expressly for customer use. (Pentax, Fujifilm, et al.) The question is was this a Sony pipe line improvement or one requested, jointly or by Fujifilm?
I have given the opinion elsewhere that Fujifilm is pushing the X100S sensor changes through as quickly as possible to the X-Pro1 and X-E1. Please see:#16. It is only speculation and could prove to be incorrect, but it is my opinion at the moment.
We are all eager to know when such a change might take place and can imagine that that is exactly what any manufacture would be equally eager that you do not find out. How else can all the rumor sites survive?
Honestly, it is better to assimilate facts we do have into a general understanding of the camera by looking to only the details that impact our use of the camera in the short run, or increase our awareness possible future products in the long run. What I call keeping the big picture in mind.
Now, going to say, Toshiba, for the next, 3d generation sensor at this moment is certainly a possibility. I doubt that would not happen unless Toshiba offered something that Sony is not prepared to deliver in the same time frame. I have also observed that in the short run, big sensors are not changing in major ways. If there is some future break through, I will be just as happy as everyone else. In the mean time, if it is not broken, why fix it?
Despite possible future availability of the 24mp Sony sensor, from all we have seen recently, I have the impression Fujifilm is content to stay at 16mp for the moment. Please the consider the following situation.
With 24mp APS-C and 36mp FF, higher pixel density appears to have reached a point where serious trade-offs appear with current CMOS wafer technology in large sensor, high image quality cameras. Everyone is waiting for further miniaturization of CMOS wafer technology. There is a perceived barrier at the moment for going smaller. Both in making CMOS circuits physically smaller and in gathering enough photons in each smaller pixel. The problem is keeping good signal to noise ratios and thus wide dynamic range and high ISO clarity we currently enjoy, along with more detail, a strong feature of large sensor size.
Improving sensor feature sets aside, the software and firmware surrounding sensors is what is changing, and that is Fujifilm's expertise. At the time of initial development they had access to an excellent 16mp sensor and designed everything around it. They have now gone to a second generation of this same sensor, while at the same time Sony pushes its 24mp offering at the current limit of miniaturization consistent with overall high image quality.
It seems 16mp works just fine also. I am extremely happy with image quality for one.
That is my two cents on sensors. All pure speculation on a thin layer of supposed facts! It will be interesting to see how it all plays out.