Leica summar 5 cm dating
The lenses are usually small aperture and will provide a clear depth of field from perhaps five feet to infinity. The lens focuses, but the user has to estimate the distance.Rangefinder cameras have at least two windows which produce two images.
It is a nice, basic, yet serious, starter camera that is actually considerably better than many of the Instamatics of the 1960s and 1970s or the 35mm fixed focus cameras of the 1980s and beyond that were to follow. (1959) The original Agfa Optima, introduced in 1959, is the world's first camera with automatic exposure selecting both the aperture and shutter speed. The light meter is made of Selenium, an element which is sensitive to light.With autofocus, you just point at the subject and the camera focuses automatically. With all of these cameras the photographer views the image through a viewfinder which is not connected to the lens.The view through this viewfinder or window can hence be slightly different from the image that hits the film.For further information see The Living Image and Olympus 35mm Rangefinder Cameras.Rangefinder focusing became common in the 1950s and remained popular until being largely replaced by the fourth focusing method, autofocus which begin with the Konica C35 AF in November 1977.The Selenium meter activates a mechanical system that sets the aperture and shutter speed.
There is a switch on the bottom - front that you switch to the A (automatic) or the flash setting.
The camera also has a self timer and a tripod socket.
I purchased mine at a Fletcher Hills (El Cajon, CA) garage sale for $5 on 3-14-09.
A follow up entilted Agfa Optima: Pop Photography 1959 Articles to the original discussion above has links to two November 1959 Popular Photography articles.
The first What's New article describes the lens as a 39mm Apotar f3.9.
The shutter is a Compur with continuously variable speeds from 1/30 to 1/250 second. "[A]s the photoelectric cell constantly monitors scene brightness, it feeds current to a mechanical system which alters the position of a cam. is depressed before each shot, it releases tension on a feller arm, thus allowing spring-loaded aperture and shutter-speed controls to move until halted by the cam, thus setting correct exposure and placing a green dot in view-finder to signify sufficient light." The shutter speed stays at 1/250 until the aperture goes to its maximum at f3.9.