SDM lens & camera's focusing switch

This might seem like a daft question to some, but can anyone advise me, with regard to using a SDM lens……..

When the focus selector switch on the lens is switched to AF, what position should be selected on the camera’s focus selection switch?

I have a Pentax K30 with AF.S/C/MF settings, I don’t yet own a SDM lens, but I am considering one.

For auto focus both switches need to be on AF. If either or both are on MF that's what you'll get.
If you use back button focussing rather than the shutter release focussing you get the best of both worlds. The lens will focus when you press the rear AF button, but will not try again when you press the shutter release so you don't have to wait while it tries to focus yet again. Might not be ideal for every subject but often works the best, though might need a bit of getting used to.
I've been trying to think of any instances where back button focussing may not be ideal. I'm still thinking... nothing's come to mind so far!

just note when you disable shutter release focus it disables CIF as well, should you wish to use it shutter release focus has to be enabled. found that out after thinking it had gone wrong when i switched to back button focus

Thanks for the advice....much appreciated.

Thanks for the info...much appreciated

Pleasure. Note your user name, why are you an unhappy snapper? Or has that changed since getting a Pentax?

I joined the forum as I had the dreaded aperture motor failure on my K30 (now resolved).
At the time I was very unhappy, but now I'm a bit happier !!
It was a play on the term "happy snaps"

Pleased your K30 is sorted and happier now!

Seems OK now, fingers crossed

In fact that's not true. Put camera or lens in MF, press and hold back af button, press shutter release. CIF works, at least on my K3 II.

Greg