This lens mount adapter allows any 72mm lens become a Macro lens on Pentax PK camera body.
Therefore,you don’t need to buy any Macro lens.
Although the lens will fit physically,automatic diaphragm,auto-focusing,or any other functions will not operate correctly with using this adapter.
72mm Male thread
Made of metal (not plastic)
Pentax PK camera body (film or digital SLR body)
There are no electrical contacts in the extension tubes. Exposure and focus have to be adjusted manually.
Aperture control is not available if you use a lens which does not allow you to manually adjust the aperture (Without an aperture ring).