Sony A7S III vs A7 IV: A Comparison

Sony A7S III vs A7 IV: A Comparison


Description: In this article, we will compare the features and specifications of the Sony A7S III and A7 IV cameras. We will discuss the similarities and differences between these two models, helping you choose the right one for your photography needs.

Which model has better low-light performance?

The Sony A7S III is known for its exceptional low-light performance, thanks to its 12.1-megapixel full-frame sensor with back-illuminated technology. This sensor allows the camera to capture clean and noise-free images even in challenging lighting conditions. The A7S III also has an impressive ISO range of 80-102,400, which can be expanded to 40-409,600.

On the other hand, the A7 IV features a higher resolution 33-megapixel full-frame sensor, which may not perform as well in low-light situations compared to the A7S III. The A7 IV has a standard ISO range of 100-51,200, expandable to 50-204,800. While the A7 IV still offers good low-light performance, the A7S III is the clear winner in this category.

Which model is better for video recording?

If you are primarily interested in videography, the Sony A7S III is the better choice between these two models. The A7S III is capable of recording 4K video at up to 120fps and offers impressive video recording capabilities, including 10-bit 4:2:2 color depth, All-I and Long-GOP compression options, and S-Log3, HLG, and S-Cinetone picture profiles.

While the A7 IV also has decent video recording capabilities, with 4K recording at up to 60fps and 8-bit 4:2:0 color depth, it does not match the level of performance offered by the A7S III. The A7 IV is more suited for hybrid shooters who require both stills and video recording capabilities, whereas the A7S III is geared towards professional videographers.

Which model has better autofocus performance?

Both the Sony A7S III and A7 IV feature advanced autofocus systems, but they differ slightly in terms of performance. The A7S III comes equipped with a Fast Hybrid AF system with 759 phase-detection and 425 contrast-detection points, providing fast and accurate autofocus tracking for both stills and videos.

On the other hand, the A7 IV features a Real-time Eye AF system with AI-based subject recognition, offering improved autofocus performance compared to its predecessors. The A7 IV has 759 phase-detection and 425 contrast-detection points, similar to the A7S III. Overall, both cameras offer excellent autofocus performance, but the A7 IV may have a slight edge in terms of subject tracking and recognition.

Which model is better for still photography?

When it comes to still photography, the Sony A7 IV is the better choice due to its higher resolution 33-megapixel sensor. The A7 IV offers more flexibility in post-processing and cropping, as well as better overall image quality compared to the A7S III.

While the A7S III is still capable of capturing high-quality stills with its 12.1-megapixel sensor, the A7 IV’s higher resolution sensor provides more detail and clarity in images. If you prioritize still photography over video recording, the A7 IV is the more suitable option for you.


In conclusion, both the Sony A7S III and A7 IV are excellent cameras with their own strengths and weaknesses. The A7S III excels in low-light performance and video recording capabilities, making it ideal for professional videographers. On the other hand, the A7 IV offers superior still photography capabilities and is more versatile for hybrid shooters.

Ultimately, the choice between these two models will depend on your specific photography needs and preferences. Whether you prioritize low-light performance, video recording, or still photography, both the A7S III and A7 IV are reliable options that deliver exceptional image quality and performance.


1. Can the Sony A7S III and A7 IV use the same lenses?

Yes, both the Sony A7S III and A7 IV are compatible with Sony’s E-mount lenses, allowing you to use the same lenses across both camera models. This makes it convenient for photographers who already own a collection of E-mount lenses.

2. Do the Sony A7S III and A7 IV have in-body image stabilization (IBIS)?

Yes, both the Sony A7S III and A7 IV feature 5-axis in-body image stabilization, providing improved stability and reducing camera shake when shooting handheld. This feature is particularly useful for capturing sharp images and smooth video footage.

3. What is the battery life like on the Sony A7S III and A7 IV?

The Sony A7S III has a battery life of approximately 510 shots per charge, while the A7 IV offers a slightly longer battery life of around 660 shots per charge. However, actual battery life may vary depending on usage and shooting conditions.

4. Can the Sony A7S III and A7 IV shoot in RAW format?

Yes, both the Sony A7S III and A7 IV are capable of shooting in RAW format, allowing for greater flexibility in post-processing and retaining more image data for editing. RAW files provide higher quality images compared to JPEG files.

5. Are the Sony A7S III and A7 IV weather-sealed?

Yes, both the Sony A7S III and A7 IV are weather-sealed to some degree, offering protection against dust and moisture. This makes them suitable for shooting in various outdoor conditions, but it is still recommended to use additional weatherproofing accessories for added protection.


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