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OM SYSTEM OM-5 Mark II Body Black Compact Light vs Sony ILCE6100KB Alpha 6100 Mirrorless 4K Video

Updated August 2026 — OM SYSTEM OM-5 Mark II Body Black Compact Light wins on weight and durability, Sony ILCE6100KB Alpha 6100 Mirrorless 4K Video wins on price and autofocus.

The OM SYSTEM OM-5 Mark II excels in outdoor performance and durability, while the Sony Alpha 6100 offers impressive versatility and affordability.

Why OM SYSTEM OM-5 Mark II Body Black Compact Light is better

Weather Sealing

The OM-5 Mark II is weather-sealed for outdoor use.

Portability

The OM-5 Mark II is lighter at 370g.

Image Quality

The OM-5 Mark II delivers unmatched image quality.

Why Sony ILCE6100KB Alpha 6100 Mirrorless 4K Video is better

Price

The Alpha 6100 is $948, making it more affordable.

Autofocus Speed

The Alpha 6100 has lightning-fast autofocus at 0.02 seconds.

User-Friendly

The Alpha 6100 features a tiltable touchscreen.

Overall score

OM SYSTEM OM-5 Mark II Body Black Compact Light
85
Sony ILCE6100KB Alpha 6100 Mirrorless 4K Video
78

Specifications

SpecOM SYSTEM OM-5 Mark II Body Black Compact LightSony ILCE6100KB Alpha 6100 Mirrorless 4K Video
SensorMicro Four ThirdsAPS-C
Max ISO2560051200
4K VideoYesYes
Continuous Shooting10fps11fps
ScreenLCDTiltable LCD

Dimension comparison

OM SYSTEM OM-5 Mark II Body Black Compact LightSony ILCE6100KB Alpha 6100 Mirrorless 4K Video

Overview of the Cameras

The OM SYSTEM OM-5 Mark II is designed specifically for outdoor enthusiasts, while the Sony ILCE6100KB Alpha 6100 offers versatility for everyday photography. Priced at $1,199.99, the OM-5 Mark II is a compact and lightweight camera ideal for travel. In contrast, the Alpha 6100 retails for $948.00, making it about 17% cheaper. Both cameras capture stunning 4K video, but each has its unique strengths tailored to different types of users.

Image Quality

The OM SYSTEM OM-5 Mark II promises unmatched image quality with sharp, stable, and vibrant shots. This camera is particularly well-suited for outdoor and nature photography, where lighting conditions can be unpredictable. On the other hand, the Sony ILCE6100KB Alpha 6100 boasts a 24.2MP APS-C Exmor sensor, which enhances image quality and performance. This sensor enables the Alpha 6100 to excel in various lighting conditions, offering a maximum ISO of 51,200. Both cameras deliver excellent results, but the Alpha 6100 may have a slight edge in low-light performance due to its higher sensor resolution.

Autofocus Performance

The OM SYSTEM OM-5 Mark II features high autofocus performance to capture fast-moving subjects. This is particularly beneficial for outdoor adventurers who may need to react quickly. In comparison, the Sony Alpha 6100 offers lightning-fast autofocus at 0.02 seconds, coupled with Real-time AF and object tracking capabilities. This advanced autofocus system makes it easier to photograph action scenes or subjects in motion. While both cameras perform well, the Alpha 6100's superior autofocus may appeal more to users focused on fast-paced photography.

Portability

Portability is a significant advantage of the OM SYSTEM OM-5 Mark II, weighing only 370g (body only). This lightweight design makes it perfect for travel, hiking, and spontaneous adventures. In contrast, the Sony Alpha 6100 is slightly heavier, but still manageable for daily use. Both cameras are compact, but the OM-5 Mark II stands out for those prioritizing a lightweight solution for outdoor activities. Its design allows photographers to carry it without feeling burdened.

Video Capabilities

Both the OM SYSTEM OM-5 Mark II and the Sony ILCE6100KB Alpha 6100 excel in video capabilities, offering unlimited 4K video recording. The OM-5 Mark II emphasizes storytelling through motion, making it a great choice for videographers. Meanwhile, the Alpha 6100 features 4K movie recording with 2.4x oversampling and full pixel readout, which enhances video quality without pixel binning. This makes the Alpha 6100 particularly appealing for users who prioritize high-quality video performance.

Build Quality and Durability

The OM SYSTEM OM-5 Mark II is weather-sealed, making it an excellent choice for outdoor shooting in various conditions. This durability is essential for photographers who venture into unpredictable environments. The Alpha 6100, while sturdy, does not specifically advertise weather sealing, which may limit its suitability for extreme conditions. For outdoor enthusiasts who need a reliable camera that can withstand the elements, the OM-5 Mark II would be the superior option.

User Experience

The OM SYSTEM OM-5 Mark II includes a computational photography button that encourages creativity inspired by nature. This feature may resonate well with outdoor photographers looking to expand their artistic capabilities. In comparison, the Sony ILCE6100KB Alpha 6100 offers a 180-degree tiltable 3-inch touchscreen LCD, which enhances user experience by allowing for easy framing and capturing of selfies or vlogs. Both cameras provide unique user experiences, but the choice largely depends on the photographer's needs—creativity versus ease of use.

Which should you buy?

Choosing between the OM SYSTEM OM-5 Mark II and the Sony ILCE6100KB Alpha 6100 ultimately depends on your specific needs as a photographer. The OM-5 Mark II is ideal for outdoor enthusiasts seeking a lightweight, weather-sealed option with high-quality image capabilities, despite its higher price of $1,199.99. Conversely, the Alpha 6100, at $948.00, offers impressive autofocus, video capabilities, and a user-friendly touchscreen, making it a versatile choice for everyday photography. If you prioritize outdoor performance and durability, the OM-5 Mark II is the way to go. However, if you're looking for a more budget-friendly option with excellent overall performance, the Alpha 6100 would be a smart choice.