The Pentax SMC 55mm 1:4 lens is a wide angle lens for the Pentax 6x7 system, 65 degrees field of view horizontally, like a 28 mm lens on a 24x36mm camera. This lens represents the third and most successful optical formula for a Pentax 6x7 55mm lens.
About the Camera:
The Pentax 6x7 is a SLR medium format system film camera for 120 and 220 film, producing images on the film nominally 6 cm by 7 cm in size, made by Pentax.The Pentax 6×7 has a dual bayonet lens mount, and a wide range of interchangeable Takumar and later SMC Pentax 67-designated lenses exist. More than forty years after the original camera introduction a wide selection of lenses is still available, together with the latest Pentax 67II variant.