WTB: Pentax K to Q-mount Adapter

GeoffMoore
Posted 23/09/2025 - 18:54 Link
I'm looking for a good condition Offical Pentax K to Q-mount Adapter - if you happen to have one please PM me.

Thanks
Geoff
Edited by GeoffMoore: 23/09/2025 - 18:54
davidwozhere
Posted 23/09/2025 - 23:58 Link
Wow, these are not cheap!! There are one or two listed here link
Both the *istDS and the K5 are incurably addicted to old glass

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Lubbyman
Posted 24/09/2025 - 12:31 Link
davidwozhere wrote:
Wow, these are not cheap!!
They weren't 5 years ago, either - £240 brand new from Ricoh Europe. But it is a high quality bit of kit. It wouldn't surprise me if I got the last new one in Europe. And in case you're wondering, I'm not selling!!

Steve
SSF1957
Posted 26/09/2025 - 16:00 Link
Lubbyman wrote:
davidwozhere wrote:
Wow, these are not cheap!!
They weren't 5 years ago, either - £240 brand new from Ricoh Europe. But it is a high quality bit of kit. It wouldn't surprise me if I got the last new one in Europe. And in case you're wondering, I'm not selling!!

Steve
Steve, enlighten me please, what is the difference between/ benefit of the Pentax adapter over the aftermarket (much cheaper) versions. Does it provide any different functionality?

Stephen
Stephen

645Z, K1, K1ii, K3iii + mono, K3ii, K3,KP, K-S1, K200D,K10D, K-r, Ist* DL, Ist* D, QS-1 plus too many film bodies !
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GeoffMoore
Posted 26/09/2025 - 19:24 Link
Stephen - Yes.
The Q is limited to a maximum 2 sec exsposure when using a lens without a leaf shutter. The Offical adapter has a leaf shutter built in and the electronics allowing you then to extend the shutter to 30 Sec and bulb.
Edited by GeoffMoore: 26/09/2025 - 19:25
Lubbyman
Posted 26/09/2025 - 20:04 Link
The leaf shutter also means that you don't get the motion artifacts that the electronic shutter can give.

The Pentax adapter also has an aperture ring which controls the aperture in lenses that don't have an aperture ring or have an A setting.

And there is the ability to attach a tripod foot to the adapter (the one used by the DA*300mm f4) so it can be tripod mounted as and when needed (not advisable to use the camera's tripod socket when a K-mount lens is attached, it's designed for light-weight Q lenses).

Steve
SSF1957
Posted 27/09/2025 - 07:28 Link
GeoffMoore wrote:
Stephen - Yes.
The Q is limited to a maximum 2 sec exsposure when using a lens without a leaf shutter. The Offical adapter has a leaf shutter built in and the electronics allowing you then to extend the shutter to 30 Sec and bulb.
Lubbyman wrote:
The leaf shutter also means that you don't get the motion artifacts that the electronic shutter can give.

The Pentax adapter also has an aperture ring which controls the aperture in lenses that don't have an aperture ring or have an A setting.

And there is the ability to attach a tripod foot to the adapter (the one used by the DA*300mm f4) so it can be tripod mounted as and when needed (not advisable to use the camera's tripod socket when a K-mount lens is attached, it's designed for light-weight Q lenses).

Steve
Steve and Geoff,

Thank you both so much for enlightening me. Makes my little after market adapter look almost worthless in comparison (which is reflected appropriately in the price I paid )
Stephen

645Z, K1, K1ii, K3iii + mono, K3ii, K3,KP, K-S1, K200D,K10D, K-r, Ist* DL, Ist* D, QS-1 plus too many film bodies !
Flickr Page
Photocrowd Page
Lubbyman
Posted 27/09/2025 - 08:45 Link
SSF1957 wrote:
Makes my little after market adapter look almost worthless in comparison
If it does what you want, then it's worth a lot irrespective of price .

Steve
GeoffMoore
Posted 27/09/2025 - 09:59 Link
Stephen, i'm happy to go halves on one and we can time share 6 months each?
Lubbyman
Posted 27/09/2025 - 14:29 Link
Something at the back of my mind says that there are also things you can do with external flash with the Pentax adapter but not with a cheap 3rd party one. It's to do with having a leaf shutter in the adapter. But I'm not sure what they are and might be completely wrong about it!

Steve
SSF1957
Posted 28/09/2025 - 08:20 Link
To date I have only used my longer Pentax K lenses (which have the tripod collar) with the aftermarket adapter I use. My concern had been to eliminate unwanted movement on the image so faster shutter speeds have been the order of the day - this thread though has opened up a whole new rabbit hole for me to dive down

Geoff, should my resolve not to buy too much more kit crumble and I acquire the adapter I will let you know - you would be more than welcome to borrow it
Stephen

645Z, K1, K1ii, K3iii + mono, K3ii, K3,KP, K-S1, K200D,K10D, K-r, Ist* DL, Ist* D, QS-1 plus too many film bodies !
Flickr Page
Photocrowd Page
Pinks
Posted 28/09/2025 - 09:05 Link
Lubbyman wrote:
The leaf shutter also means that you don't get the motion artifacts that the electronic shutter can give.

The Pentax adapter also has an aperture ring which controls the aperture in lenses that don't have an aperture ring or have an A setting.

And there is the ability to attach a tripod foot to the adapter (the one used by the DA*300mm f4) so it can be tripod mounted as and when needed (not advisable to use the camera's tripod socket when a K-mount lens is attached, it's designed for light-weight Q lenses).

Steve
Would the aperture control you mentioned support newer Pentax lenses? If so, it would be amazing to see a full frame version to use with film! I’d certainly purchase day one

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