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Viewfinder
A less conspicuous, unusual feature of the A-1 is the fact that, unless you are taking a meter reading, the only thing you can see in the bright viewfinder is the viewing area. All other information is eliminated, leaving you undistracted freedom to focus and compose your picture.
The A-1 uses the Central Emphasis Metering method of exposure measurement which reads the entire viewing area with emphasis on the central portion where the subject is most likely to be placed. This metering system ensures correct exposure even when skylight is present in your picture.
This camera is equipped with a split-image/ microprism rangefinder focusing screen.
Viewing and Focusing
To focus, rotate the focusing ring of the lens as you view the subject through the view- finder. Do not swing your upper body backward and forward as you focus.
The focusing screen is composed of three different focusing aids: a microprism ring and a split-image rangefinder in the central area, and a surrounding matte screen. The split-image rangefinder tells you that the image is “in focus” when the image, which is divided horizontally when out of focus, merges to become one complete image. The microprism rangefinder presents a clear, steady image when in focus but a broken, shimmering image when not accurately in focus. When your desired subject is sharp, you know that the focus is correctly set. You can focus with any of these three focusing aids as you like depending on the subject and your preference.
