Sony FX3 vs A7SIII – Check Which One Is Best & Why?

Why Do I Recommend Sony FX3?

• The FX3 features an active cooling system with a fan, allowing for longer recording times without overheating. The A7S III uses a passive cooling design, which is still effective but doesn’t support as long continuous recording under high-stress conditions.
• The FX3 is equipped with multiple 1/4″-20 UNC threads across its body for attaching various accessories directly, without needing a cage. The A7S III typically requires additional rigs or cages to attach similar levels of external gear.
• The FX3 includes built-in XLR audio inputs via the included top handle, making it more suitable for professional audio recording setups out of the box. The A7S III requires an external adapter (such as the Sony XLR-K3M) to connect XLR microphones.
• The FX3 comes with video-centric color profiles & options that are fine-tuned for post-production workflows, such as S-Cinetone, which offers a cinematic look straight out of the camera. While the A7S III supports a wide range of color profiles, including S-Log and HLG.
• Both cameras are designed to be compact, but the FX3’s design is especially conducive to gimbal & drone use, where its form factor and weight distribution are advantageous.
• Sony FX3 can take 510 shots (LCD) and 135 minutes of video recording with a single charge, and Sony A7S III can take 600 shots (LCD),and  95 minutes of video recording.

Maybe the Sony A7S iii price can make you comfortable because it’s a little bit cheaper than the FX3. But you have to compromise all the above-mentioned features. Now the Decision is Yours. I hope it was helpful to choose the right one.

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What Common Both Can Do?

The Sony FX3 and A7S III share several high-performance features, reflecting Sony’s commitment to providing exceptional quality and versatility in both their cinema and mirrorless camera lines. Here are the common capabilities that both cameras offer, showcasing their strengths in video and still photography:

• 12.1MP Full-Frame Exmor R CMOS Sensor: Both cameras are equipped with the same sensor, offering excellent low-light capabilities and a wide dynamic range, ideal for both video and still photography.
• ISO Range: They share an impressive ISO range of 80-102,400 (expandable to 40-409,600), enabling remarkable performance in a variety of lighting conditions.
• 4K Video Recording at up to 120fps: Both can record 4K video at up to 120 frames per second, allowing for high-quality slow-motion footage.
• 10-bit 4:2:2 Internal Recording: They offer 10-bit 4:2:2 color sampling for internal recording, ensuring high-quality video with greater color depth and grading flexibility.
• S-Log3 and Hybrid Log-Gamma (HLG): Both cameras support S-Log3 and HLG, providing a wide dynamic range for advanced color grading in post-production.
• Fast Hybrid Autofocus System: The Fast Hybrid AF system, featuring 759 phase-detection points and 425 contrast-detection points, delivers fast and accurate autofocus performance in both video and still modes, including Real-time Eye AF for humans and animals.
• In-body Image Stabilization (IBIS): With 5-axis stabilization, both cameras offer effective compensation for camera shake, enhancing the quality of handheld shooting.
• Dual CFexpress Type A / SD Card Slots: They are equipped with dual card slots that support both CFexpress Type A cards for high-speed, high-resolution recording and SD cards for versatility and convenience.
• 16-bit RAW Output via HDMI: Both the FX3 and A7S III can output 16-bit RAW video through their HDMI ports to external recorders, maximizing post-production flexibility and quality.
• External Audio Input and Output: Each camera features a 3.5mm microphone input and a 3.5mm headphone output for audio monitoring and recording, with the FX3 also including XLR inputs via the handle for professional audio connectivity.
• Wi-Fi and Bluetooth Connectivity: They offer built-in Wi-Fi and Bluetooth for remote control and file transfer, enhancing workflow efficiency.
• Vari-angle Touchscreen LCD: Both models come with a vari-angle touchscreen LCD, facilitating easy navigation of menus and settings, as well as flexible framing and focusing during shooting.

The Sony FX3 and A7S III are both versatile tools designed to meet the demands of professional videographers and photographers. They share core technologies that enable high-quality video and still imaging, robust autofocus capabilities, and flexibility in post-production workflows. If you are okay with the above-explained feature, then you can get any one of these.