Tamron-F 2x PZ-AF BBAR MC7 teleconverter for Pentax K battery door but it’s a real camera

but it’s a real camera with a good lens that can take proper pictures

but everything works

Zuiko Auto-T 100mm f2

you can still hold on to it pretty well: it's about as thick as a good quality hot dog

Approximately 35mm inside diameter

Tamron-F 2x PZ-AF BBAR MC7 teleconverter for Pentax K battery door but it’s a real cameraTamron F 2x PZ AF BBAR MC7 teleconverter for Pentax K mount cameras and lenses. This is an "autofocus" teleconverter with passthroughs for electronic contacts and mechanical focus coupling. So it will autofocus in theory, but autofocus performance will vary with lens, camera, and shooting conditions so don't bet the farm on it.