Praktica B lenses on Micro Four Thirds

What the adapter has to do

Praktica B is a bayonet, so an M42 adapter won't take these lenses. Look for one sold for Praktica B, sometimes listed as PB. Prakticar lenses have three electrical contacts in the mount that send the set aperture to the camera, a system Pentacon called EDC. A plain adapter has no contacts, so the camera never sees the lens's aperture setting.

Set up your Micro Four Thirds camera

1. 01On OM System and Olympus bodies, give the stabilizer the focal length. Press INFO while setting Image Stabilizer, then enter the number printed on the lens.
2. 02To save lenses you use often, add them under Lens Info Settings (up to 10). The saved focal length also feeds the stabilizer and goes into the Exif data.
3. 03MF Assist only reacts to a focus ring the camera can read, which an adapted lens doesn't have, so assign Peaking to a button instead.

What each lens becomes

Micro Four Thirds has no full-frame bodies. On a smaller sensor the frame is cropped, so each lens frames like a longer one. The f-number still sets exposure, while the depth of field looks like the larger number shown.

The Praktica B lenses we cover

• 50mm f/1.8

  Zeiss Jena · Praktica B

  Carl Zeiss Jena Prakticar 50mm f/1.8

  1979–1982

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