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OM SYSTEM OM-D E-M1 Mirrorless Camera

The OM System E-M1 is a 20MP Micro Four Thirds mirrorless camera — with 4K video and in-body stabilization. Check GearFocus for current availability, with buyer protection on every purchase.

OM SYSTEM OM-D E-M1 Mirrorless Camera

OM SYSTEM OM-D E-M1 Mirrorless Camera

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Camera Overview — OM System E-M1

The OM System OM-D E-M1 is a Micro Four Thirds mirrorless camera built around a 20MP sensor powered by the TruePic IX image processor. It offers a native ISO range of 200 to 25600, giving shooters a solid working range across varied lighting conditions. The camera's magnesium alloy body is weather sealed and measures 130.4 x 97.0 x 63.1 mm, weighing in at 497g — sturdy but manageable for extended shooting sessions.

The autofocus system combines Phase Detection and Contrast Detection across 121 focus points, with subject tracking included, though eye tracking is not available. A 5-Axis In-Body Stabilization system helps control camera shake without relying on digital IS. Burst shooting reaches 10fps, and the maximum photo resolution is 5184x3888 pixels.

Video tops out at 4K with frame rates of 24fps and 30fps, recorded in 8-bit with Standard and Flat color profile options. The electronic viewfinder delivers 2,360,000 dots at a 120Hz refresh rate, while the rear 3.0-inch articulating touchscreen LCD offers 1,037,000 dots of resolution. Connectivity includes Wi-Fi, USB, and Micro HDMI output.

Storage is handled via SD, SDHC, or SDXC cards, and the camera uses a Lithium-Ion battery rated for approximately 350 shots per charge.

Key Features — OM System E-M1

20MP MFT Sensor: The 20-megapixel Micro Four Thirds sensor paired with the TruePic IX processor delivers a maximum resolution of 5184x3888 pixels across a wide range of shooting conditions.

5-Axis In-Body Stabilization: Sensor-shift stabilization on all five axes reduces camera shake for sharper handheld images and smoother video without relying on lens-based or digital IS.

Weather-Sealed Magnesium Alloy Body: The dust and moisture resistant magnesium alloy construction makes this camera suitable for outdoor and field use in demanding conditions.

121-Point Hybrid Autofocus: Combines Phase Detection and Contrast Detection across 121 focus points, with subject tracking included for keeping moving subjects sharp.

120Hz Electronic Viewfinder: The 2,360,000-dot EVF running at 120Hz provides a smooth, responsive view that helps with tracking and precise framing.

4K Video Recording: Records 4K footage at up to 30fps with Standard and Flat color profile options, giving shooters a baseline for color grading in post.

Camera Specifications — OM System E-M1

OM System E-M1 full specifications
SpecDetail
Use CasesWildlife, Sports, Travel, Documentary
TypeMirrorless
SensorMicro Four Thirds (MFT)
Resolution20MP
ProcessorTruePic IX
ISO Range200 – 25600
AF SystemPhase Detection, Contrast Detection
AF Points121 points
Max Photo Resolution5184x3888
Burst Rate10 fps
Max Video Resolution4K
Max Frame Rate30fps

Description — OM System E-M1

The OM System OM-D E-M1 pairs a 20MP Micro Four Thirds sensor with the TruePic IX image processor, delivering capable stills at a maximum resolution of 5184x3888 pixels and burst shooting at up to 10fps. The camera's weather-sealed magnesium alloy body measures 130.4 x 97.0 x 63.1 mm and weighs 497g, balancing durability with portability. The 5-Axis In-Body Stabilization system works without digital IS assistance, while the 121-point hybrid autofocus — combining Phase Detection and Contrast Detection — adds subject tracking for more dynamic shooting situations.

The 2,360,000-dot electronic viewfinder operates at a 120Hz refresh rate, complemented by a 3.0-inch articulating touchscreen LCD at 1,037,000 dots. On the video side, the E-M1 records 4K footage at up to 30fps in 8-bit with Standard and Flat color profiles. The ISO range spans 200 to 25600, and connectivity covers Wi-Fi, USB, and Micro HDMI.

Storage is via SD, SDHC, or SDXC cards, with a hot shoe for external accessories.

Pros — OM System E-M1

  • ✓Weather-sealed magnesium alloy body provides durability at 130.4 x 97.0 x 63.1 mm and 497g
  • ✓5-Axis In-Body Stabilization helps reduce camera shake across shooting scenarios
  • ✓121-point autofocus system with both Phase Detection and Contrast Detection plus subject tracking

Cons — OM System E-M1

  • ✗Eye tracking is not available despite subject tracking being present
  • ✗Video is capped at 8-bit color depth with only Standard and Flat profiles available
  • ✗Battery life is rated at approximately 350 shots per charge, which may fall short for heavy shooting days

Videos — OM System E-M1

OM System OM-1 Final Review — DPReview TV

Resources & Downloads — OM System E-M1

Manuals & Guides

Frequently Asked Questions — OM System E-M1

What lens mount does the OM System OM-D E-M1 use?+
The OM-D E-M1 uses the Micro Four Thirds lens mount, making it compatible with the wide range of lenses built around that standard. It also features a hot shoe for external flash or accessories.
Does the OM-D E-M1 have in-body image stabilization?+
Yes, the camera features 5-Axis In-Body Stabilization. It does not rely on digital IS, which is listed as disabled in the specifications.
What video capabilities does the OM-D E-M1 offer?+
The camera shoots up to 4K video at a maximum frame rate of 30fps, with 24fps also available. Video is recorded in 8-bit with Standard and Flat color profile options.
What are the connectivity options on the OM-D E-M1?+
The camera includes Wi-Fi, USB, and Micro HDMI output. Bluetooth is not available, and the USB port is not USB-C. There is no headphone or microphone jack listed in the specifications.
What is the ISO range of the OM-D E-M1?+
The camera offers a native ISO range from 200 to 25600, as listed in the specifications.
How does the autofocus system work on the OM-D E-M1?+
The OM-D E-M1 uses a hybrid autofocus system combining Phase Detection and Contrast Detection across 121 focus points. Subject tracking is supported, but eye tracking is not available on this model.

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