Pentax 645 120mm f/4 Macro - Ken Rockwell
This is Pentax' manual focus macro lens for the Pentax 645, 645N and 645NII medium-format cameras. It is wonderful because it focuses all the way up to 1:1 life size in one turn of the big focus ring. It works in all the automatic and manual exposure modes of the Pentax 645, 645N and 645NII. These lenses are bargains today.