Originally posted by Nicolas06 All new mirrorless lenses being smaller is a bit optimistic when you hava DA21, DA40, FA43 in the current DSLR line up... In term of pure of ergonomics smaller than a pancake isn't really practical. And everything past 50mm is a tele and doesn't benefit. You wouldn't get any smaller pancakes anyway for short focal length, but you would get significantly bigger 55 and 70 lenses where a pancake design would not work anymore for short registration distance.
With short register distance you can design lenses significantly faster that Pentax pancakes without the lenses getting bigger.
Samsung 10/3.5 a pancake fisheye lens
Samsung 16/2.4 is half the size of Pentax DA 15/4
Samsung 20/2.4 is the same size of Pentax DA 21/3.2
Samsung 30/2 faster pancake than any Pentax.
The reason for me to get a mirrorless system is because they can give advantages not possible not possible on a K-mount camera. It's not that I want to replace my DSLR system with it.
Quote: K01 is K-mount so with same registration distance and all. It could fit an FF sensor because anyway the K-mount can fit it and was there. There no need for bigger mirror, bigger OVF because theses are simply not present. Their neither a need for more space for AF sensor as thoses are directly on the sensor. The K01 is similar to A7 in size and the latest cameras in A7 serie also have FF sensor, SR and much more powerfull processing than the best pentax has. If Sony can fit it, Pentax surely can. The limiting factor isn't the mount or registration distance. At worst the mount would protrude a bit like it does on K01 or on a K3.
With an EVF sticking out of the back of a FF Pentax K-mount camera, I would expect it to be more the size on Sigma Quattro than Sony A7 II.
Compact Camera Meter Quote: Well Leica is a bit expensive and that's the only other manufactuer that has an FF mirorless. Sure Leica design is great but we can't all afford it. As for Olympus/Pana/Canon/Nikon their mirrorless line doesn't cover FF so that's a bit easier and not comparable in quality. Also, the best registration distance isn't an absolute but relative to the sensor size and once you remove the mirror box, there really nothing that prevent you to have lens that protrude a bit inside the body as long as they are dedicated for this mirrorless line. The only really constraint for that would a different back hood and that's about it.
Lenses protruding into the camera is not a very good design. It's just a way of trying to work around the disadvantage of using a long register mount. But why use a long register distance at all then?
- Lenses would no longer be compatible with K-mount.
- Optical design would be severely limited as the lens elements would have to be very small if the lens protrudes into the mount. It would only be possible on very slow lenses.
- The lenses will only look small when on camera, but in the bag the will take much more space.