How to use your Pentax K (PK) mount lens on a Sony E (NEX) camera body?

Sony E body + Pentax PK lens

COMPATIBLE MF MA SB TS

PK lenses can be easily adapted to Sony E cameras.

The difference between flange focal depths is 27.46 mm. This is more than enough for the aperture release lever of the PK, which means you won't have to DIY anything. The locking lug can be found on the adapter, it can be easily released with a small button.

Another available version is the PK-NEX tilt-shift adapter, compatible with all PK lenses. You can find them here:

Last, but not least speedbooster adapters are also available. The adapter shrinks the projected image of the fullframe PK to fit the APS-C sensor NEX cameras (A6000, A6300, A6500):

Have you found an error, or would you like to share some insight about an item? Feel free to mail it to us, we appreciate your help in improving the site.

Terminology

In terms of compatibility, we distinguish four separate categories:

COMPATIBLE

PARTIALLY COMPATIBLE

COMPATIBLE IN THEORY

NOT COMPATIBLE

This means that you'll be able to apply the lens on the camera in question with a proper adapter, and full focus range will be available with it (often with aperture control too). If AF is supported, you'll see it in the description.

This means that due to the flange focal depth or other factor this conversion would be normally unfeasible, but with some compromises (e.g. using a speedbooster adapter) can be made possible.

This means that the flange focal depth should make mounting and using inifinty focus possible, but for some reason there are no adapter rings available or other factors make it unviable.

This means that you won't be able to mount your lens due to mechanical incompatibility or the difference in flange focal depth doesn't make inifinity focus possible. Although numerous lenses can be mounted on cameras without infinity focus, but this cannot be considered actual compatibility.

Additional information for compatible variations:

MAC

manual focus (on the lens, with its own control ring)

autofocus available (AF controlled by the camera body)

manual aperture control (on the lens, with its own control ring)

automatic aperture control (controlled by the camera body)

speedbooster (focal reducer) adapters are available

macro (variable length) adapters are available

tilt-shift (or other flexible) adapters can be used

If you'd like to read more in-depth about compatiblity, you'll need to get familiar with flange focal depth, see this article.