I have this extension tube set too, and it won't allow any f-stop display simply because they do not have the neceassily contacts on the mount. So they basically turn every lens into K/M lens. For the same reason, you cannot use the 'A' button of the aperture ring.

regards,
Alan Chan

I'm really disappointed that the Pentax people couldn't answer a simple =
question about their own (Pentax) extension tubes with their own camera =
(PZ-1p).

I just got Extension Tube Set B (Auto) made by Pentax from KEH.  They
are in great shape, except when I try to use them, the only information
that shows in the viewfinder is the shutter speed.  Where the F-stop
should appear, there is just a blank.  This happens whether I am in
automatic or manual mode.  Also, the autofocus won't work (which I
really don't care about because I focus manually most of the time
anyway).

Can anyone help me on this. I thought I read somewhere that this
extension tube set would allow me to use all of the Pentax functions of
my camera. (I am really upset that Pentax technicians couldn't offer me any
help on this.
They did say that someone would get back to me on Monday, though.)

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