Originally posted by RedBoomer Awaldam - I appreciate your knowledge on how the Pentax system works. Pentax have not done a very good job of explaining how best to use their system so information such as yours is much appreciated. It all makes sense to me as well as Derekkite's suggestion that the processing is too slow to handle hi-continuous and the focus accuracy suffers as a result.
To confirm my recommendation of SEL 4 (centre point ) - SEL4 is the expanded AF mode 27-point and I select the centrepoint mainly because it means you can switch from portrait to landscape orientation without changing the target point. I am not disabling Predictive AF but using it. SEL 4 is what appears in the top lcd when SEL-Large is chosen in the Info settings for the expanded af mode.
Ah sorry
I think of them as expanded 27 , expanded 9 and expanded single
You probably technically more correct sing SEL4
When you said center point I assumed ! you meant single expanded or single point serves me right for not checking SEL4
In reality you do them same as me but use 27 point, I use 9 point because it is noticeably quicker to react and hand off (less processing required), I also usually use center but sometime top middle for breast stroke to aid framing for head shot close up.
I agree with you both processing power needs to upped to cater for the modes properly but I think Pentax,Canon and Nikon are all guilty in their midsummer models of giving feature sets that the CPU can't drive fast enough to utilize fully.
Canon and Nikon probably do it to leverage upgrades and Pentax to keep price competitive, Hopefully they'll re asses 'good enough' forTheir FF offering.
To improve tracking my settings across models
k10d - never used af-C as to slow
k20d - single point af-C non tracking pan and hold
k5 - 5point AF-C tripod panning
k3 - 9 point expanding