This photo of my photoalbum was taken in Okinawa.

Zenit is a Russian (and formerly Soviet) camera brand manufactured by the KMZ factory (Krasnogorskiy Mekhanicheskiy Zavod) near Moscow since 1952 and by BelOMO in Belarus since the 1970s. The Zenit trademark is primarily associated with 35mm SLR cameras. Amongst related brands are Zorki for 35mm rangefinder cameras, Moskva (Moscow) for medium-format folding cameras and Horizon for panoramic cameras. The name is sometimes spelled Zenith in English literature, such as the manuals published by the UK Zenit-importers TOE. (However, TOE's imported camera bodies themselves retained the "Zenit" badges.)

The Petri (ペトリ, Petri?) Camera Company was an optical company and manufacturer of cameras in Japan. It was founded in 1907. Prior to World War II, it was known as Kuribayashi Shashin Kōgyō or Kuribayashi Camera Industry, inc. Japan (the company name means "Acorn Grove"). In 1962 it changed its name to Petri Camera Ltd. Petri produced many bellows and single-lens reflex cameras. During the 1960s its main products equalled Nikon's in features at half the price. Due to increased electronization, mass production and competition from other camera vendors, Kuribayashi filed for final bankruptcy in 1977. The labor union, affiliated with Sohyo, continued the company under the name Petri Kōgyō K.K. with employee capital. The last model produced was the MF10, but with its screw-mount lens it could not compete with products having electrical contacts, and disappeared in the autofocus boom of the 1980s. Now out of the camera business, Petri Kōgyō manufactures telescopes at a plant in the town of Sugito, Saitama Prefecture.