Olympus OM-20 Overview: Same As The OM-10?

Last Updated on December 20, 2023

The Olympus OM-20 stands out in the photography market for its efficiency and simple design, distinguished by its accessibility and quality. Compared to the Olympus OM-10, both cameras belong to the same economical category, yet the OM-20 excels in ease of use as it lacks an adapter, unlike the OM-10.

Olympus OM-20

Olympus OM-20 Specs

Canon AE-1 35mm Film
The iconic 35mm camera stays as relevant as ever, boasting its AE (Automatic Exposure) system and focal plane shutter.
Year Release1983
US NameOympus OM-G
TypeSLR Reflex Camera
Film Format35mm
Lens MountOlympus OM, Bayonet
Shutter Speed2 sec to 1/1000 sec
Focusing ScreenLumi-Micron Microprism/Split Image
View-Field93% Coverage
Magnification0.92X (50mm Lens at Infinity)
SynchroX Contact, Direct Only
Exposure ControlAperture-Priority, TTL OTF Metering
Measuring RangeEV-0.5~EV18 (ASA 100, F1.2)
Exposure Compensation±2 EV
Film AdvanceLever Type, 130° Angle
Motor Drive Rate5 fps with Motor Drive
Manual Exposure1-1/1000 sec
Film SpeedASA 25-1600
Film RewindCrank Type
Battery CheckLED and PCV (Acoustic Signal)
Self-TimerElectronic, ~12 sec Delay
Power Source2x 1.5v SR44 Batteries
Accessory ShoeBuilt-in, X-Contact
ViewfinderPentaprism Type
Dimensions (Body Only)135x84x50mm, 430g
Dimensions (w/ 50mm Lens)135x84x81mm (F1.8), 600g

General Description

Drawing inspiration from the classic OM-1, the OM-20 incorporates speed settings into a ring built into the camera body.

Although more affordable than Olympus’s single-digit series, the OM-20 offers numerous advantages. It is compatible with Olympus’s high-quality lenses (like the OM-1 and OM-10), known for their excellent color, contrast, and sharpness. Its features include an adjustable shutter speed ring, focus and aperture control, mostly on the lens itself, and a depth of field preview button integrated into the lens.

Its design is simple, sober, and complete, with an automatic mode (aperture priority) and manual controls. The dial for the automatic mode allows exposure adjustments and includes a battery check function. The manual mode, with an integrated light meter, suggests the appropriate shutter speed. Additionally, it features a Bulb mode for long exposures, selected using the dial.

The OM-20 distinguishes itself from the OM-10 by including a cable release socket and offers exposure compensation (+/- 2 stops) in automatic mode. It has an ISO selector and a self-timer button with a mirror lock-up feature to reduce vibration. Film rewind is manual, through a lever and clutch system. Unlike the high-end OM-1, it does not offer a mirror lock-up option.

This camera comes with a mini grip and can accommodate a motor drive without removing the grip. It operates on two 1.5V button cell batteries, and the film compartment opens by pulling up the rewind lever. Its fabric shutter curtains require extra care to avoid light leaks.

The OM-20 is also flash-compatible, including dedicated Olympus automatic flashes and others. Its compact size makes it ideal for outdoor and urban photography. Notably, it features a bright and clear viewfinder and is recommended for high-quality photography, comparable to top-tier German optics.


  • Approximately $100 US dollars with the Zuiko 50mm f/1.8 lens.

Olympus OM-20 Photos

Final Thoughts

The Olympus OM-20 presents itself as a semi-advanced version of the OM-10, offering a range of additional features that enhance its versatility and functionality. With the inclusion of a manual shutter speed ring, a PC-sync flash connection, LED warnings in the viewfinder, built-in manual metering, and the ability to mount a stable grip, the OM-20 surpasses its counterpart, the OM-10.

Despite these improvements, the OM-20 is often available at a more affordable price than some cameras in its category, making it an attractive choice for both amateur photographers and those seeking a cost-effective alternative with advanced features.

Kodak Portra 400
Professional 35mm film: captures natural and smooth tones with precision.

Author: Jorge Ferrufino

Written by Jorge Ferrufino

I am a fashion photographer and an analog photography enthusiast since the beginning of my career (15 years ago). I have had the opportunity and honor of showcasing my work in various galleries and publications around the world.

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