Check this posting out:http://www.pentaxforums.com/forums/48-pentax-medium-format/182276-pentax-medium-format-third-party-resources-ii-t-s-lenses-tilt-shift-lenses.htmlhttp://wiese-fototechnik.de/Website/English/Products.htmlHere's a ebay listing for a 75mm - it doesn't look like there are options in the 100-150mmhttp://www.ebay.com/itm/SMC-Pentax-67-75mm-f-4-5-Shift-Perspective-Control-Prime-Lens-for-6x7-67-67II/291278268779