OM SYSTEM Olympus OM-3 Silver Micro Four Thirds vs Sony a6700 Alpha APS-C Mirrorless Camera
Updated August 2026 — OM SYSTEM Olympus OM-3 Silver Micro Four Thirds wins on creative, Sony a6700 Alpha APS-C Mirrorless Camera wins on video and autofocus.
The Sony a6700 excels in advanced features and video capabilities, while the OM SYSTEM Olympus OM-3 offers creative flexibility and weather sealing. Choose based on your priorities.
Why OM SYSTEM Olympus OM-3 Silver Micro Four Thirds is better
Price
OM-3 is approximately 10.5% cheaper.
Weather Sealing
OM-3 has IP53 rating for dust and water resistance.
Creative Features
OM-3 offers unique computational photography capabilities.
Why Sony a6700 Alpha APS-C Mirrorless Camera is better
Image Quality
Sony a6700 has a higher 26MP resolution.
Video Capabilities
Sony a6700 supports 4K/60p and high frame rates.
Autofocus
Sony a6700 features advanced AI-based autofocus.
Overall score
Specifications
| Spec | OM SYSTEM Olympus OM-3 Silver Micro Four Thirds | Sony a6700 Alpha APS-C Mirrorless Camera |
|---|---|---|
| Sensor | 20 MP BSI | 26 MP APS-C |
| Video | 4K/30p | 4K/60p |
| Battery Life | N/A | 1000+ JPEGs |
| Weather Sealing | Yes | No |
| Autofocus Points | Contrast AF | 759 Phase AF |
Dimension comparison
Design and Build Quality
The OM SYSTEM Olympus OM-3 features a vintage-styled, premium metal body, while the Sony a6700 Alpha offers a modern design. The Olympus camera is priced at $1,699.99, while the Sony camera costs $1,898.00, making the OM-3 about 10.5% cheaper. The OM-3 also boasts an IP53 rating, providing dustproof, splashproof, and freezeproof protection, which is ideal for outdoor photography. On the other hand, the Sony a6700, though not explicitly rated for weather resistance, is known for its robust build quality typical of Sony’s mirrorless cameras. Both options cater to different aesthetic preferences, with the OM-3 leaning towards classic design and the a6700 embodying a contemporary look.
Image Quality and Sensor
When it comes to image quality, the Sony a6700 leads with its 26MP APS-C format Exmor R back-illuminated CMOS sensor, offering enhanced detail and clarity. In comparison, the OM SYSTEM Olympus OM-3 has a 20 MP stacked BSI Live MOS sensor. While the Sony camera captures higher-resolution images, both sensors perform well under various conditions. The a6700’s advanced BIONZ XR processing power ensures exceptional image quality and faster performance. The Olympus camera, although lower in megapixels, features computational photography capabilities such as Live ND and High Res Shot, providing creative flexibility for users.
Video Capabilities
The Sony a6700 excels in video recording, featuring 4K/60p capabilities with 6K oversampling and 10-bit recording options. This camera is perfect for videographers looking for high-quality footage, especially with its ability to shoot at high frame rates of 4K/120p. The OM-3, while it does not have the same video specifications, offers creative video features such as slow motion and quick motion video through its S&Q mode. If video performance is a priority, the Sony a6700 is clearly the superior choice, aligning better with modern filming demands.
Autofocus and Tracking
The autofocus system in the Sony a6700 is significantly more advanced than that of the OM-3. With 759 phase detection AF points covering 93% of the frame, the a6700 provides faster and more precise autofocus capabilities. Additionally, it features AI-based real-time tracking that enhances subject recognition, making it ideal for capturing fast-moving subjects. Conversely, the OM-3 does not emphasize autofocus technology in its features, focusing more on creative controls and photography techniques. For those prioritizing fast and accurate autofocus for action shots, the Sony a6700 is the clear winner.
Creative Features
Both cameras offer unique creative features tailored to different user preferences. The OM SYSTEM Olympus OM-3 stands out with its Creative Dial, allowing users to control color profiles, monochrome profiles, and art filters easily. This camera’s computational photography features enable innovative shooting techniques, such as live composite and focus stacking, making it a great option for artistic photographers. The Sony a6700, while it excels in technical performance, also includes features like focus bracketing and real-time tracking for more dynamic shooting. Ultimately, the OM-3 appeals to those who value creative expression in their photography, while the a6700 caters to those seeking precision and versatility.
Battery Life and Performance
In terms of battery life, the Sony a6700 is equipped with the NP-FZ100 battery, capable of shooting more than 1000 JPEG images at 11 frames per second. This impressive performance ensures that videographers and photographers can capture extensive sessions without frequent battery changes. The OM-3 does not specify its battery performance; however, it is designed to be efficient for casual shooting. For users who plan on extended shooting sessions, the Sony a6700 offers a more reliable battery life, making it a better choice for long days of shooting.
Price and Value
The OM SYSTEM Olympus OM-3 is priced at $1,699.99, while the Sony a6700 is available for $1,898.00, making the OM-3 approximately 10.5% less expensive. Given its solid build quality, weather sealing, and unique creative features, the OM-3 offers good value for photographers who appreciate its artistic capabilities. Conversely, the a6700's higher price reflects its advanced technology and superior specifications, which may be worth the investment for those looking for cutting-edge performance. Buyers must consider whether they prioritize budget-friendly options or high-end features in their decision-making.
Which should you buy?
Choosing between the OM SYSTEM Olympus OM-3 and the Sony a6700 ultimately depends on your specific needs as a photographer or videographer. If you are looking for a camera that allows for creative expression with features like the Creative Dial and robust weather sealing, the OM-3 is a fantastic choice at $1,699.99. However, if your focus is on advanced autofocus, superior video capabilities, and high-resolution images, the Sony a6700, while priced higher at $1,898.00, provides the technology you may require. Consider your priorities—artistic creativity or cutting-edge performance—before making your decision.

