This post is to show how lenses from the Pentax 67 cameras will be able to fit on the Pentax 645D body.

Simply attach the 67 to 645 adapter to the camera, and then attach the 67 lens. The adapters were available from B&H Photo in the States but the site says they are no longer available. I got mine from Amazon.co.jp.

Using larger lenses on a smaller camera will mean that your normal lenses become telephotos, and your telephotos become super-telephotos. This particular adapter will allow aperture priority metering (unlike the 67 to 35mm adapter).

It is worth remembering that larger lenses can fit on smaller cameras, but smaller lenses can’t be used on larger cameras. This means that  lenses designed specifically for  cameras with APS sized sensors won’t work on a full frame 35mm camera. When buying lenses consider if you may be switching to full frame 35mm in the future so you  won’t have to replace incompatible equipment.