There are a few custom sensor array manufacturers. They tend to be mostly for industrial, aerial photography, or military applications. Usually custom software that matches the captures and blends them together. Best I saw so far was a 16MP three CCD module that could be arranged in anything from a 2 by 2 grid to a 3 by 4 grid, limited mostly by data transfer rates over FireWire. Each module contains a splitter prism with separate filtered red, green and blue 24mm by 36mm CCDs. I don't recall the specifics on the software, or how much overlap, though I remember a comment about 3 frames per second capability. Obviously not very portable, compact, nor inexpensive.
Large Format film is still incredibly good. While it might seem to be obsolete technology, as long as some large format film (and processing) are still available we can expect technically good results. Medium format digital backs show up used, or as discount refurbished items, more often every year. While it is tempting to adapt something, the cost is still not insignificant, and focusing accuracy on a ground glass remains an issue.
Ciao!
Gordon Moat
A G Studio
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