The high-tech pinnacle of the OM series of 35mm SLR cameras made by Olympus. The OM-4 was introduced in 1983 and continued in production until 1987, when it was modified with titanium top and base plates and sold as the OM-4T until 2002. The camera has a horizontally-traveling cloth shutter with a top shutter speed of 1/2,000th. The automatic exposure modes are capable of timing exposures out to as long as four minutes. The OM-4 was also the first camera with a multi-spot meter, capable of spot metering up to eight different spots in the frame and averaging them to get to the best exposure. The camera also has better weather sealing than previous OM models, as well as a dedicated hot shoe - differing specifically from the OM-1 and OM-2, which required a separate hot shoe accessory to be attached to the top of the camera.
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Olympus OM-4 + Zuiko 40mm f2 Lens
The Olympus Zuiko 40mm f2 is the smallest lens for the OM system, measuring just less than 1" long. It is also one of the rarest and most desirable Olympus lenses ever made, with fewer than 10,000 copies produced between 1984-1994. Designed as part of a special personal project by the legendary Olympus engineer Yoshihisa Maitani, the Zuiko 40mm f2 manages to squeeze an impressive 6-element, 6-group optical formula into its compact "pancake" shape. One quirk of the lens introduced by its diminutive size is that the aperture ring is at the very front of the lens -- filters screw directly into it, and actually make it easier to adjust.
Here, an Olympus OM-4 makes a period-appropriate pairing with the Zuiko 40mm f2. The OM-4's advanced multi-spot metering system ensures accurate exposure with this uncommon optic.