Originally posted by ogl I don't understand hints to 35 mm and 645 system...
To put 35 mm to 645D?
What is the 645D to do with K-mount lenses?
But there was old rumor about hybrid mount to fit 645 and K lenses.
Maybe the 645D will allow the use of FA (and DA) lenses through an adapter (a bit like the Nikon FX cameras allow the use of DX lenses).
This way, every Pentaxian could get its FF Pentax DSLR... for roughly US$ 10 000! Not exactly what FF lovers had in mind I guess. lol!
If it's got the 30 Mpix sensor mentioned in the past, a 645D sensor would be about 4800 pixels high x 6400 pixels wide. On a 1:1 ratio sensor (about 60mm x 45mm — but I suspect a 645D would have a 1.3x ratio sensor instead), this would mean about 107 pixels per millimeter.
So used with a lens designed to cover a 24mm x 36mm sensor, this would result in 2560 pixels x 3840 pixels, about 10 Mpix. Or 5 Mpix for an APS-C size sensor.
Well, even with such an adapter, it's not like it's going to be an actual FF DSLR. A medium format digital camera is much less convenient to carry around and really not meant for action, low light or sports photography.