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Tech · Olympus · 1972

Olympus OM-1

The smallest, quietest full-size manual SLR. Its meter was designed for a battery that's no longer sold.

35mm film SLRs still worth buying used — #3

Overall

7.9

out of 10

Axis scores

Strongest on Design (9.2), weakest on Ease of use (7.4), a 1.8-point spread. The 7.9 overall is the plain average of all 5 Tech axes, with no weighting.

Olympus OM-1 — axis scores out of 10Horizontal bar chart of editorial scores out of 10 across 5 axes. Bars run from a shared zero baseline; longer is better. Olympus OM-1: Performance 7.6, Value 7.6, Durability 7.8, Ease of use 7.4, Design 9.2.PerformanceOlympus OM-1 — Performance 7.6 out of 107.6ValueOlympus OM-1 — Value 7.6 out of 107.6DurabilityOlympus OM-1 — Durability 7.8 out of 107.8Ease of useOlympus OM-1 — Ease of use 7.4 out of 107.4DesignOlympus OM-1 — Design 9.2 out of 109.2Editorial score out of 10 — higher is better
  • Performance — How well it does the core job
  • Value — What the same money buys elsewhere
  • Durability — Failure and fade reports past the one-year mark
  • Ease of use — Setup, daily operation, cleaning, maintenance
  • Design — Build quality and how it sits in a room

Specs

Shutter
Mechanical, 1 s to 1/1000 s, B
Metering
Center-weighted, match needle
Power
One 1.35 V mercury cell (PX625), meter only
Mount
Olympus OM

As published by the manufacturer. We didn't measure these ourselves.

Is it for you

Buy it if

  • Size and weight decide whether a camera comes with you
  • You want a bright, big viewfinder for focusing manual lenses
  • A soft shutter sound matters for quiet places

Skip it if

  • You want an accurate meter without an adapter or a recalibration
  • You'd rather not deal with foam light seals on a 50-year-old body

Olympus set out to make a full-frame SLR much smaller than the Nikon and Canon bodies of the time, and the OM-1 is still the benchmark. The viewfinder is large and bright, and the shutter is soft enough that owners describe it as discreet. The matching Zuiko lenses are small too.

The meter is the catch. It was calibrated for 1.35-volt mercury cells, which were banned decades ago. Modern 1.5-volt substitutes give slightly off readings. The usual fixes are a voltage-adapter battery, zinc-air cells, or having a shop recalibrate the meter. Since the meter only reads light, the shutter works with no battery at all.

The foam that stops light leaks breaks down with age on most copies. The prism foam is the serious one, because as it crumbles it can corrode the prism’s silvering. Ask the seller whether the seals and prism foam were replaced. A body that has been serviced is worth more.

The later OM-1n added a flash-ready indicator and is otherwise very similar. Either works for a buyer who mostly cares about size, so pick whichever listing has the better seals and a clear viewfinder.

Last updated . The scoring method is on how we rank.