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OM SYSTEM Olympus OM-3 Silver Micro Four Thirds vs Sony Alpha 7 IV Full-frame Mirrorless

Updated August 2026 — OM SYSTEM Olympus OM-3 Silver Micro Four Thirds wins on portability, Sony Alpha 7 IV Full-frame Mirrorless wins on video cap. and features.

The OM SYSTEM Olympus OM-3 offers a more affordable and weather-sealed option, while the Sony Alpha 7 IV excels in image quality and video capabilities.

Why OM SYSTEM Olympus OM-3 Silver Micro Four Thirds is better

Price

OM-3 is $298 cheaper

Weather Sealing

OM-3 has IP53 rating

Creative Features

OM-3 offers unique photography modes

Why Sony Alpha 7 IV Full-frame Mirrorless is better

Image Quality

Sony has a 33 MP sensor

Video Capabilities

Sony supports 4K 60p video

Sales Rank

Sony has a better sales rank of 4732

Overall score

OM SYSTEM Olympus OM-3 Silver Micro Four Thirds
75
Sony Alpha 7 IV Full-frame Mirrorless
88

Specifications

SpecOM SYSTEM Olympus OM-3 Silver Micro Four ThirdsSony Alpha 7 IV Full-frame Mirrorless
Sensor TypeBSI Live MOSExmor R CMOS
Video ResolutionN/A4K 60p
ProcessorTruePic XBIONZ XR
Weather SealingIP53No
Viewfinder2.36m-Dot OLEDElectronic

Dimension comparison

OM SYSTEM Olympus OM-3 Silver Micro Four ThirdsSony Alpha 7 IV Full-frame Mirrorless

Overview of the Cameras

The OM SYSTEM Olympus OM-3 is priced at $1,699.99, making it about 15% cheaper than the Sony Alpha 7 IV, which costs $1,998.00. Each camera serves different user needs while offering unique features that appeal to various types of photographers and videographers. Understanding these differences can help potential buyers make an informed choice.

Design and Build Quality

The OM SYSTEM Olympus OM-3 boasts a vintage-styled, premium metal body, designed for durability and aesthetics. It has an IP53 rating, meaning it is dustproof, splashproof, and freezeproof, making it an excellent option for outdoor and travel photography. In contrast, the Sony Alpha 7 IV is known for its robust and ergonomic design, but it does not emphasize weather sealing. While both cameras are built to last, the OM-3 may be better suited for adventurous photographers.

Image Quality

The OM SYSTEM Olympus OM-3 features a 20 MP stacked BSI Live MOS sensor, which offers excellent image quality in various conditions. The camera's TruePic X Processor enhances performance, ensuring vibrant and sharp images. Meanwhile, the Sony Alpha 7 IV comes equipped with a 33 MP full-frame Exmor R back-illuminated CMOS sensor, which provides superior detail and low-light performance. This difference in sensor resolution makes the Sony a better choice for those prioritizing image quality in diverse lighting situations.

Video Capabilities

In terms of video recording, the OM SYSTEM Olympus OM-3 includes computational photography features and offers creative modes. However, the Sony Alpha 7 IV excels with its ability to shoot up to 4K 60p 10-bit 4:2:2 video, allowing for high-quality video production and streaming. This makes the Sony a stronger candidate for videographers or content creators who need robust video performance alongside still photography.

Creative Features

The OM SYSTEM Olympus OM-3 stands out with its unique creative features such as Live ND, Live Composite, and a Creative Dial that allows for various color and monochrome profile controls. These features enable photographers to experiment with their creativity easily. Conversely, the Sony Alpha 7 IV focuses on color accuracy and provides beautiful color expression with its S-Cinetone color profile. Both cameras offer creative tools, but their approaches differ, with the OM-3 leaning more towards experimental photography.

User Experience and Usability

The OM SYSTEM Olympus OM-3 includes a 2.36m-dot OLED electronic viewfinder, enhancing user experience by offering a clear and bright view of the subject. Its design caters to photographers who appreciate a tactile and intuitive shooting experience. On the other hand, the Sony Alpha 7 IV is designed for a modern, hybrid shooting experience, facilitating easy transitions between stills and video. The differences in usability may influence user preference based on their shooting style.

Market Position

The OM SYSTEM Olympus OM-3 has a sales rank of 25,171, while the Sony Alpha 7 IV holds a significantly better sales rank of 4,732. This indicates that the Sony is currently more popular among consumers, suggesting a higher level of trust and satisfaction in its performance. The market position can often reflect user experiences and the camera's overall reputation, which may be a consideration for buyers.

Price Considerations

With the OM SYSTEM Olympus OM-3 priced at $1,699.99 and the Sony Alpha 7 IV at $1,998.00, the price difference of $298 makes the OM-3 about 15% cheaper. This pricing may be significant for budget-conscious buyers who still want high-quality performance. However, those looking for more advanced features may justify the higher price of the Sony Alpha 7 IV.

Which should you buy?

In conclusion, the choice between the OM SYSTEM Olympus OM-3 and the Sony Alpha 7 IV depends largely on your specific needs as a photographer or videographer. If you prioritize a weather-sealed design, creative features, and a lower price point, the OM-3 may be the right choice for you. However, if high-resolution images, superior video capabilities, and a robust market reputation are more important, the Sony Alpha 7 IV could be worth the additional investment. Ultimately, both cameras offer unique strengths that cater to different creative pursuits.