This is the potash plant west of Regina. Dad captured this image from a small plane with his Mamiya RB67 PRO and a 65mm lens. Dad tested the very first RB67 in Canada. I remember him telling me that he sent a list of changes that Mamiya should make to the camera before it went into full production. I think one of the changes was the side the dark slide was on and Mamiya changed that, also the cocking lever was one more change. Dad later had a whole Mamiya system and used it for many years to come, He would later sell it and move to a Hasselblad system which I bought off of him before he retired.