Pentax's early 6x7 macro — the SMC Takumar 6x7 135mm f/4 Macro for close-up work on 6x7.
The SMC Takumar 6x7 135mm f/4 Macro is a close-focusing short-telephoto lens for the Pentax 6x7 medium-format system, from the SMC Takumar 6x7 generation of the line. It was the early macro option for the system, corrected for close-up subjects on the large 6x7 negative while also serving as a short portrait lens.
This is a manual-focus lens for the Pentax 67 bayonet mount, covering the 6x7 cm frame. It has a fixed 135mm focal length and a maximum aperture of f/4. The macro designation reflects an optical layout optimised for close subject distances, and the Super-Multi-Coated glass denoted by the SMC Takumar name controls flare on the short-telephoto field.
A 135mm macro on the 6x7 frame gives a longer working distance than a shorter macro, useful for close-ups of subjects that are hard to approach, and it doubles as a mild portrait lens. The close-focus correction holds detail at short range, which the big negative rewards for still-life and nature work.
On the used market this early macro is a practical and reasonably available member of the line for close-up 6x7 work. Confirm the extended focus helicoid runs smoothly through its long travel, inspect for haze and fungus given the age, and check the aperture blades are dry. Watch for any thorium yellowing as with early Takumars; it adapts to mirrorless via a Pentax 67 adapter.