Overview:
- Program mode: A fully automatic mode where the camera sets both the shutter speed and aperture. This is convenient for quick, point-and-shoot situations.
- Aperture priority mode: A semi-automatic mode where you set the aperture, and the camera automatically selects the correct shutter speed.
- Manual/Spot mode: Offers full manual control over both shutter speed and aperture. In this mode, the camera utilizes a spot meter to measure a small, central area of the scene, providing more precise exposure control.
- Shutter speed control: Unlike most SLRs, the OM-2S features a shutter speed dial on the lens mount, making for easy and fast adjustments without having to move your eye from the viewfinder.
- Exposure compensation: The dial typically used for shutter speed selection on other cameras functions as a convenient exposure compensation dial on the OM-2S.
- Compact size: Like other OM series cameras, the OM-2S is known for its relatively small and lightweight all-metal body.
- OM lens mount: It uses the Olympus OM system lens mount, which has a wide range of compatible lenses.
Additional characteristics:
- Power: The camera is battery-dependent for all functions and uses LR44 batteries.
- Viewfinder: The viewfinder includes a split-prism and micro-prism focusing screen for accurate manual focusing. It also displays information about the metering.
- Flash sync: A flash sync speed of 1/60s.
- Durability: The OM-2S is described as a solid and reliable performer, even decades after its production.

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