|1979 advertisement for the D2-RZ|
US retailer Ritz Camera announced the Delta 2 RZ or D2-RZ in late 1978. It appears to be a rebadged Topcon RM 300 but with a distinctive "rugged" diamond-pattern covering which had become a Ritz trademark. A Quantaray-branded 55mm f/1.7 lens was the standard lens, but numerous other K mount lenses can be attached. The vertically-traveling shutter permits a respectable 1/125 second flash sync speed, and there is a PC socket (originally capped) above the self-timer lever.