Originally posted by Docrwm So, because the K-01 relies on contrast to focus it makes it more likely that it will be able to focus without the filter. Hmmm, seems that greater sharpness would be preferable for the K-5 as well. I wonder how it would perform with only the 1 filter?
I think I understand, but I probably have it wrong. If so Falk or somebody will fix this.
Not quite; for Live View, yes - maybe, if they use CDAF. PDAF requires separate, dedicated hardware (cross sensors) independent of the image sensor (since it works with the mirror down). Contrast detect works with the mirror up (or mirrorless) and permits Live-View focusing. Therefore unless the K-5 replacement were to use CDAF instead of PDAF the removal of the AA filter(s) from the image sensor should not affect autofocus.
And if they're going to do that, why have a mirror at all.
Phase Detect and Contrast detect are quite siimilar in the method of measurement. The PDAF algorithm, though, can anticipate the direction the focus should move and can even anticipate where focus will
be for a moving subject whereas the CDAF algorithm seems to do neither.
Cambridge in Colour resource #1 Cambridge in Colour resource #2