Originally posted by PixelPete I bought the K-70 and did a little investigation of the wired remote socket.
It is indeed a 3.5mm socket - the 4 pole type. I bought one in Maplin (UK) soldered some wires to it and did a little, careful, prodding. No, the camera didn't blow up or get bricked.
Pentax are being a little sneaky here, I think. The result is that connecting the wires together in combinations produces the desired result.
Please refer to the attached diagram.
Connecting A with B produces a shutter half-press.
Leaving these 2 connected, then connect C and a full shutter press takes place.
I say Pentax are being sneaky, because the outer ring is not used - only the 3 inner rings - the same connections as for the old 2.5mm plugs ...
I just need now to sort out the connections from my 3rd party intervalometer and I'll see if I can get it to work.
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Pete
I'm confused! It seems that the CS310 remote release for the K70 is a 3.5mm 4 section device, but my copy of the K70 manual states that the microphone connection is via "Stereo mini plug (3.5mm)". Web searches define this unanimously (?) as a 3 section device.
Anyway, in ignorance I bought a standard 3 section 3.5mm male to 2.5mm female adapter and used this to connect my old/standard 2.5mm release cables to the K70. This arrangement works perfectly well to recognise part and full press operations as on my K10D and K3 II.
After reading the messages relating to this topic, I began to wonder if I was loosing the plot. I've just now re-checked that my solution does indeed work.
I did notice that the picture of the CS310 shows a moulded on RFI filter, so I provided similar protection by threading the adaptor cable twice through a small ferrite toroid.