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OM SYSTEM Olympus OM-1 Mark II Micro Four Thirds vs Sony ILCE6100KB Alpha 6100 Mirrorless 4K Video

Updated August 2026 — OM SYSTEM Olympus OM-1 Mark II Micro Four Thirds wins on build quality, Sony ILCE6100KB Alpha 6100 Mirrorless 4K Video wins on video capability and autofocus.

The OM SYSTEM Olympus OM-1 Mark II excels in durability and advanced features, while the Sony Alpha 6100 offers great value and versatility. Choose based on your specific needs.

Why OM SYSTEM Olympus OM-1 Mark II Micro Four Thirds is better

Image Quality

Superior low noise performance with BSI sensor

Build Quality

Weather-sealed design for outdoor use

Autofocus

Extensive AF points for tracking

Why Sony ILCE6100KB Alpha 6100 Mirrorless 4K Video is better

Price

Significantly lower price point

Video Capabilities

4K video with advanced features

Speed

Lightning-fast autofocus at 0.02 seconds

Overall score

OM SYSTEM Olympus OM-1 Mark II Micro Four Thirds
85
Sony ILCE6100KB Alpha 6100 Mirrorless 4K Video
90

Specifications

SpecOM SYSTEM Olympus OM-1 Mark II Micro Four ThirdsSony ILCE6100KB Alpha 6100 Mirrorless 4K Video
Sensor20MP BSI24.2MP APS-C
ISO RangeLow noiseUp to 51,200
AF Points1,053Real-time tracking
VideoNot specified4K with oversampling
WeightNot specifiedLightweight design

Dimension comparison

OM SYSTEM Olympus OM-1 Mark II Micro Four ThirdsSony ILCE6100KB Alpha 6100 Mirrorless 4K Video

Overview of the Cameras

The OM SYSTEM Olympus OM-1 Mark II is priced at $1,999.99, while the Sony ILCE6100KB Alpha 6100 comes in significantly lower at $948.00, making it about 53% cheaper than the Olympus model. Both cameras appeal to different segments of the photography market, with the Olympus targeting high-end outdoor photographers and the Sony appealing to those who prioritize versatility and affordability.

The Olympus OM-1 Mark II boasts advanced features such as a 20MP stacked BSI sensor and weather-sealed design, suitable for challenging environments. In contrast, the Sony Alpha 6100 features a 24.2MP APS-C sensor, emphasizing speed with a lightning-fast autofocus system and 4K video capabilities.

Image Quality

When it comes to image quality, the Olympus OM-1 Mark II presents a 20MP BSI stacked sensor that offers low noise performance and high resolution. Its powerful TruePic X engine enhances image processing, delivering superior quality in various shooting conditions. The computational photography functions available in the OM-1 Mark II allow for remarkable versatility in capturing stunning images.

On the other hand, the Sony Alpha 6100 features a 24.2MP Exmor sensor, which is known for its excellent dynamic range and high-quality performance in both photo and video capture. The inclusion of a front-end LSI further improves the image quality, making it a solid choice for those who want to shoot at high ISO levels, reaching up to 51,200. Both models deliver exceptional image quality, but the Sony's higher megapixel count could appeal to those who prioritize detailed images.

Autofocus System

The autofocus capabilities of these two cameras differ significantly, which can impact the overall shooting experience. The Olympus OM-1 Mark II is equipped with Cross Quad Pixel AF, offering 1,053 points of high-precision focusing. This extensive autofocus system ensures that subjects are tracked accurately, even in fast-paced environments, making it perfect for wildlife photography.

In contrast, the Sony Alpha 6100 boasts a lightning-fast autofocus system that locks on in just 0.02 seconds, utilizing real-time AF and object tracking. This speed is particularly beneficial for capturing fleeting moments, whether in sports or everyday life. The superior autofocus of the Sony camera makes it an excellent choice for those who prioritize speed and efficiency in their photography.

Build Quality and Design

The build quality and design of the Olympus OM-1 Mark II is engineered for extreme conditions, featuring an IP53 rating that signifies its dustproof and splashproof capabilities, working effectively even in temperatures as low as -10℃. This weather-sealed design makes it an ideal companion for outdoor adventures, where unpredictable weather can pose challenges.

In comparison, the Sony Alpha 6100, while also well-constructed, does not emphasize weather resistance to the same extent. It focuses more on portability and ease of use, highlighted by its 180-degree tiltable touchscreen LCD, which adds flexibility for vlogging and selfies. Thus, while the Sony is designed for general use, the Olympus stands out for outdoor enthusiasts who require rugged durability.

Video Capabilities

Video recording is a crucial aspect for many modern photographers, and both the Olympus OM-1 Mark II and the Sony Alpha 6100 excel in this area. The OM-1 Mark II offers advanced computational photography features, allowing for exceptional video quality and creative shooting options. However, specific video specs were not detailed in the provided data.

The Sony Alpha 6100, on the other hand, shines brightly with its 4K video capabilities, utilizing 2.4x oversampling for full pixel readout without pixel binning. This results in high-quality video output that is ideal for content creators and filmmakers. The inclusion of a microphone input enhances its functionality for serious videographers. For those prioritizing video quality, the Sony model has a clear advantage.

Price and Value

In terms of pricing, the OM SYSTEM Olympus OM-1 Mark II is positioned at $1,999.99, while the Sony ILCE6100KB Alpha 6100 is available for $948.00. This significant price difference of about $1,052.99 means that the Sony camera is roughly 53% less expensive than the Olympus model.

Considering this price point, the Sony Alpha 6100 offers incredible value, especially for beginners or casual photographers looking for a reliable mirrorless camera. The Olympus, while more expensive, caters to professionals who seek advanced features and superior durability for outdoor photography. The choice between the two ultimately depends on budget and specific photography needs.

Target Audience

The Olympus OM-1 Mark II is tailored for serious photographers who engage in outdoor photography, such as wildlife and landscape enthusiasts. Its weather-sealed design, robust autofocus, and advanced computational features make it ideal for capturing stunning images in challenging conditions.

Conversely, the Sony Alpha 6100 targets a broader audience, including beginners, vloggers, and casual photographers who desire a versatile, easy-to-use camera. With its impressive autofocus, compact design, and 4K video capabilities, it provides a well-rounded solution for various photography and videography needs.

Which should you buy?

Choosing between the OM SYSTEM Olympus OM-1 Mark II and the Sony ILCE6100KB Alpha 6100 ultimately hinges on your specific needs and budget. If you are an outdoor photographer who requires a durable, high-performance camera with exceptional image quality and advanced features, the Olympus OM-1 Mark II is worth the investment. However, if you seek a more affordable, versatile option with strong video capabilities and excellent autofocus performance, the Sony Alpha 6100 is the superior choice at about 53% less than its competitor.