The first model, the OM-10, was introduced six years after the professional model OM-1, and three years after the OM-2. All OM models use the same line of Olympus OM lenses, giving them all the Depth of View (DOF) preview functionality, which was the standard on most OM Lenses.
The double-digit consumer models featured smaller, fixed viewfinders, have generally slower top shutter speeds and do not have the same connectivity to off-camera flashes as their seniors. They were also manufactured with lower cost components, where the rigors of their moving parts are not rated for as many activations as the professional line. Though well built, the robustness and the solid feel of the single-digit models is just not very apparent with this line.
OLYMPUS OM30 & TAMRON 28mm adaptal OM mount With the onset of autofocus cameras into the market, Olympus released two motor-driven bodies which are derivatives of the original OM series with the OM-707 and the OM-101, and later a rebranded Cosina model, the OM-2000.
A little-known fact, the focusing screen of the OM-10 is actually interchangeable. It shares the same focusing screen as the OM-1, but the extra protruding tab needs to be cut off as the OM10 doesn't have a placeholder for it. Doing it is not as easy as reading about it actually.
OM-10 QD, 1980
OM-10 FC, 1982
OM-20 (OM-G in the US), 1983-1987
The OM-20 was available in chrome and in black and it was sold side by side with the OM-10.
OM-30 (OM-F in the US), 1983-1987
When used on other OM bodies, the lens functions as a semi-autofocus, with autofocusing triggered with a button on the lens. On the OM-30 the autofocus mode can also be triggered by the shutter release button. Motorized single autofocus or continuous autofocus is possible with the combination of a Winder, or Motor Drive and the M.In-Focus Trigger Cord. Available in chrome and in a black finish.
OM-40 Program (OM-PC in the US), 1985-1987
Favourite Cameras: Olympus OM-10
Olympus OM-20 35mm slr review