The Flash-O-Set is a 35mm viewfinder camera with selenium cell-controlled auto-exposure. It was made in Japan by Yashica. Its distinctive feature is a built-in flashbulb holder, for which there is an ejector button on the lower front, and a flash exposure table on the back. The Flash-O-Set has a general look similar to the Yashica rangefinder cameras.
There are two models; the original - introduced in 1961 has the light meter cell above the lens and the name plate below the bulb ejector. The meter cell of the 1962 Flash-O-Set II is mounted around the lens, and the manual shows that the camera seems to have been supplied with a neutral-density filter - which would cover the meter cell as well as the lens - for use in very bright conditions.
- Lens: Yashinon 40mm f4, fixed focus
- Shutter: fixed 1/60
- Metering: Selenium cell
- Flash: built-in AG-1 bulb holder + x-sync PC socket
- Power: type Y-10 15 volt battery for firing flash bulbs
- Yashica 35mm Rangefinder Chronology by the Yashica Guy includes the Flash-O-Set
- Yashica 35 Flash-O-Set II manual at Mike Butkus' Orphan Cameras
- Photo of Flash-O-Set on Flickr by SydneyWalker (earlier model than the Flash-O-Set II, with the meter cell above the lens)
- Flash-O-Set, Flash-O-Set II, Flash-O-Set II on www.collection-appareils.fr by Sylvain Halgand (in French)
- Yashica Flash-O-Set II video presentation by YouTuber カメラの1510