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Also called CR1/3N because it is 1 ⁄ 3 rd the height of an alkaline N cell, and a stack of three of them will form a battery with the same dimensions as an N cell, but with 9 V terminal voltage. Such 9 V batteries in a single package do exist but are rare and only usually found in specialist applications; they can be referred to as 3CR1/3N.
Battery: 2x LR44; 2x SR44 or equivalents; or one CR1/3N. Mechanical self-timer. Depth of field preview. Film memo holder. Safe-load signal indicating film present and correctly spooled. Film advance release allowing multiple exposures. Motorized film advance possible with Minolta Auto Winder D.
Standard battery nomenclature describes portable dry cell batteries that have physical dimensions and electrical characteristics interchangeable between manufacturers. The long history of disposable dry cells means that many manufacturer-specific and national standards were used to designate sizes, long before international standards were reached.
The FA was a battery-powered (two SR44 or LR44, or one 1/3N) electromechanically (much electronics, but many springs, gears and levers) controlled manual focus SLR with manual exposure control or aperture priority, shutter priority and programmed autoexposure.
The FM3A is built to a high level of workmanship and material quality. It shares the advantages of the FM and the FM2n, both generally regarded as two of the most reliable cameras ever built (both in terms of operation under extreme conditions and in day-to-day reliability reports from repair shops and magazine surveys).
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