Olympus's focus-aid OM SLR — the OM-30, aperture-priority auto, in-focus detection, OM mount, 1982.
The Olympus OM-30 is a 35mm film SLR from Olympus, a consumer double-digit OM body sold in some markets as the OM-F. Released in 1982, it is notable as an early experiment in focus assistance, able to give an in-focus confirmation and, with a special AF Zuiko lens, a form of autofocus operation. It sat in the amateur OM line alongside the OM-10 and OM-20.
As a specification summary, the OM-30 is a single-lens reflex for 35mm film using the Olympus OM mount, with an electronically-controlled focal-plane shutter. It offers aperture-priority automatic exposure with through-the-lens centre-weighted metering, shown in the viewfinder. A distinguishing feature is its in-focus detection system, which lights an indicator when the subject is sharp and could drive a dedicated motorised AF Zuiko lens for early autofocus. Because the shutter is electronically timed, the camera requires battery power to fire correctly.
The OM-30 suits general users, students and beginners who want a compact automatic OM body with a focus-confirmation aid to help with manual focusing. It works with the standard OM lens range for normal use, while its focus indicator can assist users who find fine focusing difficult. The dedicated AF lens that enabled its autofocus function was uncommon, so most examples are used as focus-confirm manual bodies.
On the used market, remember the electronic shutter needs working batteries, so confirm the camera powers up, the auto exposure responds and the focus-confirmation indicator lights. Expect perished foam light seals and mirror-damper foam and budget for a reseal, as is typical for OM bodies. Test the shutter across speeds, inspect the prism for haze or desilvering, and check the film advance, rewind and focusing screen for damage; verify the focus-aid electronics work if that feature matters to you.