Originally posted by leekil Weirdly, the DF is quite huge, compared to what this simplified DSLR would be.
Which happens to be about the size you squeeze a FF DSLR into. The compact/low-end FF DSLRs from Canon and Nikon also happen to be about the same size (and all are about the size of the K-1) - DSLRs are not the same as film SLRs, there is a lot more that needs to be packed into them, and a lot more engineering involved to overcome the problems associated with digital technology. You simply
cannot squeeze a DSLR into a film SLR body. If you want something that size, you need to go mirrorless, but even then you discover the same problems - the big size/weight savings of mirrorless comes from chopping out the mirror and prism. Take the A7II; E-mount has a flange distance of 18mm, K-mount 45.46, a difference of 27.46mm. The depth of the A7II is 59.7mm, the K-1 85.5mm, a difference of 25.8mm... already less than the difference in flange depth. If you shave back the K-1s prism protrusion to the same length as the hand grip you would save about another 4mm. The A7II is much shorter than the K-1, but completely uncoincidentally, the difference in height is pretty much the size of the prism (not just the housing extending from above the top plate, the full prism).
FF digital mirrorless cameras have the same problem as their DSLR siblings, they still need to cram all the electronics in to support the sensor, along with a powersource and suitable heat dissipation, and to keep size down, mirrorless manufacturers tend to sacrifice some on the powersource side of things. By not being tied to a mirrorbox, prism and legacy mount mirrorless cameras are able to make some pretty impressive size savings before they hit the same wall as for DSLRs, but the limits are there too (check out the distance between the sensor plane and the rear of the camera on the A7II... even further than on the K-1!).
Pentax has put a lot of effort into producing compact DSLRs, the latest and greatest effort being the K-P, which uses a smaller sensor (APS-C) and battery to try to get it there. Given that Pentax produces cameras like the K-P, and the K-S1 and the K-r before it, if they could squeeze a DSLR, even APS-C, into the body of a ME/MX/LX/Spotmatic/etc they would have.
Originally posted by leekil I disagree with your contention that it wouldn't be much cheaper than a
K-1. I would expect that they would use an older FF sensor, which would cost less, and the removal of the IBIS and screen could conceivably allow a significant reduction in price.
About $300, and I am probably being generous. When approaching EOL (like the D750 and 6D currently are) the savings will be even bigger... but the same can be said of the K-1, you just need to wait. Components are just a part of the cost of a camera, and likely not the major one - the big expense is all the non-component related stuff, R&D, staffing, marketing, operating costs (rent, electricity, etc), the need to make a profit, the staffing, operating and profit costs of the distributors, the staffing, operating and profit costs of the retailers. It all adds up, very, very quickly, and the problem with the non-component costs is they still need to be covered, even if you make a camera with no screen or IBIS - those engineers that develop IBIS for other cameras still need to be paid, hell, the engineers which explored ideas that ultimately get canned and you never hear about still need to be paid, they still need a workplace to go to, they still need electricity to do their jobs, they still need managers, they still need materials to conduct their research, and so on. Developing technology is expensive.