This is purely a theoretical discussion, I very much doubt Pentax would put my idea into practice. I'm mostly curious to see if it's possible.
Anyway, since the K-01 uses the standard K mount, it has enough space between the mount flange and the sensor for a mirror (i.e. the register distance is the same as it's been since 1975). But a lot of this space is unused and just adds bulk to the camera. Whether this is a problem for any particular person is up to them. But given that MILCs are generally intended to be more compact than DSLRs, would it not be better to reduce the size of the thing?
But if you simply reduced the register distance by, say, 10mm, you'd be unable to focus on anything closer than about 500 yards. Fine for landscapes and BIF, but not much else.
The solution is in two parts: firstly, take the MILC-specific lenses you're already making (e.g. XS40mm) and design them to focus properly on the shorter register distance. Lo and behold, a very compact, APS-C, K-mount MILC. And secondly, make (or use an existing) 10mm extension tube, so that all standard K-mount lenses will focus as normal. Obviously you'd need all your contacts for data, SDM, aperture etc and an AF screw, so it wouldn't be that cheap. True you'd be adding bulk and weight, but not much and only if you use standard K lenses.
The only drawbacks I can see are the added expense of the extension tube - although you could use a cheaper manual one of course - and the incompatibility of the XS lenses on standard K-mount cameras - although they'd probably make great budget macro lenses.
I didn't intend this to be a discussion on the size of the K-01
per se, but it might well turn into one. But in practical terms, would this actually work, and more importantly, would you buy it (assuming the only additional cost was the extension tube, approx $80 US)?
Last edited by Joe Nation; 04-26-2012 at 01:30 AM.