How to use your Praktica B (PB) mount lens on a Micro 4/3 camera body?

Micro 4/3 body + Praktica B lens

COMPATIBLE MF MA

Conversion is entirely possible.

The Praktica B is an SLR system, which leaves ample space for mounting on an M4/3 mirrorless. The adapter ring consists of two parts: the PB bayonet lock is held by three small bolts in the black ring and the release lug.

Find your adapter here:

Keep in mind that using a fullframe PB lens will get you a crop factor of 2*, because of the tiny sensor of the M4/3 body, you'll get a pretty high focal length multiplier (you'll get a smaller image frame). Find out more about focal length in this article if you're interested.

The flange focal depth of the Praktica B bayonet lock system which was introduced in 1978 (bayonet or PB mount) is often specified 44mm incorrectly, while it's actually 44.4mm.

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.