For sale an excellent condition SMC Pentax M*67 400mm f/4 ED(IF) with original dedicated Locking case and straps. Awesome glass for your 6x7, also works with Canon, Nikon,or Sony a7 bodies via an adapter. This lens on a 35mm body is equivalent to an 800mm lens.
On May-20-17 at 19:17:04 PDT, seller added the following information:This has the original Pentax 6x7 mount not a K mount. Maximum aperture is f/4