Pentax's first-generation 6x7 long tele — the Super-Takumar 6x7 300mm f/4 for the 6x7 negative.
The Super-Takumar 6x7 300mm f/4 is a long telephoto lens from the first generation of Pentax 6x7 glass, released with the camera in 1969. The Super-Takumar 6x7 badge marks it as an early example, before the SMC Pentax 6x7 and SMC Pentax 67 rebrandings of the line's long telephotos for the 6x7 negative.
This is a manual-focus lens for the Pentax 67 bayonet mount, covering the 6x7 cm frame. It has a fixed 300mm focal length and a maximum aperture of f/4, bright for a medium-format long telephoto. On the large negative a 300mm reaches well into distant subjects, and this early version carries the multi-coating the Super-Takumar badge denotes.
The 300mm strongly compresses perspective and isolates distant subjects on the 6x7 frame, suiting landscapes, wildlife and other long-reach work. It is a large and heavy lens best used on a tripod, and the f/4 aperture helps with focusing and subject separation given the reach on so large a negative.
On the used market this early long telephoto is a bulkier specialist item bought by 6x7 landscape and wildlife shooters. Inspect for haze and internal fungus across the long barrel, check the front element, and confirm the aperture blades are oil-free with smooth focus. Watch for thorium yellowing as with early Takumars; it adapts to mirrorless via a Pentax 67 adapter.