Sony A7 IV or A7 III: which full-frame Sony is the smarter buy?

Display

The A7 IV wins clearly here. It uses a 3.0-inch vari-angle touchscreen with a much higher-resolution 1.03m-dot panel, which is noticeably better for reviewing focus, checking exposure, and shooting video at odd angles. The A7 III’s 3.0-inch tilting screen is functional, but it is lower-resolution and less flexible for vertical framing, vlogging, and tripod work. If you shoot video, portraits, or content for social platforms, the A7 IV is the more modern and useful tool.

Performance

The A7 IV is the stronger performer overall. Its 33MP sensor gives you more detail than the A7 III’s 24.2MP sensor, which matters for cropping, large prints, and commercial work. Autofocus is also a big step forward: the A7 IV has Sony’s newer real-time tracking with improved eye AF for people, animals, and birds, plus better subject recognition and more reliable hit rates in difficult scenes. Both cameras offer 5-axis in-body stabilisation and 10fps burst shooting, but the A7 IV’s buffer handling, processing, and AF consistency make it the better camera for fast-moving, high-pressure shooting. Winner: A7 IV.

Build quality and design

Both bodies are well made, weather-sealed enough for everyday professional use, and sit comfortably in the hand. The A7 IV is the more polished camera ergonomically, with a deeper grip, improved control layout, a better joystick feel, and a more intuitive menu system that is far easier to live with than Sony’s older interface on the A7 III. The A7 III is still compact and solid, but it feels like an earlier generation body. The A7 IV also has a fully articulating screen, a more modern card setup with CFexpress Type A/SD support in one slot and SD in the other, and generally better handling for hybrid creators. Winner: A7 IV.

Battery life

This is closer than the rest of the comparison. Both cameras use Sony’s NP-FZ100 battery, which is excellent by mirrorless standards and a major reason Sony bodies are so practical for travel and event work. In real use, both can comfortably get through a long day of stills, though the A7 III has a reputation for slightly better endurance in some stills-only scenarios thanks to its lower-resolution sensor and less power-hungry display. However, once you factor in the A7 IV’s more capable screen and video features, the difference is not large enough to change the buying decision. Winner: A7 III, narrowly.

Price and value for money

This is where the A7 III makes its strongest case. At £1198, it is £454 cheaper than the A7 IV, and that is a meaningful saving that could go toward a lens such as the FE 28-70mm kit alternative, a fast prime, or extra batteries and storage. For photographers who mainly shoot portraits, travel, street, events, or family images, the A7 III still delivers excellent full-frame quality and strong autofocus for the money. That said, the A7 IV’s extra resolution, better screen, improved AF, and stronger video tools make it the better long-term investment if you can stretch the budget. Winner: A7 III for pure value, A7 IV for overall value.

Game library/features

If by features you mean the shooting tools that matter in practice, the A7 IV has the deeper toolkit. It offers superior subject tracking, better subject detection, improved menu usability, stronger video options, and more flexible workflow support. In video, the A7 IV is the clear winner with 4K up to 60p in Super 35 and 4K 30p from the full sensor, plus 10-bit 4:2:2 recording, S-Cinetone, and much more robust colour grading potential. The A7 III is still capable with 4K video, but it is limited to 8-bit and is much less future-proof for serious hybrid shooters. Winner: A7 IV.

Overall user experience

The A7 IV feels like the camera Sony should have made next. It is better for photographers who want a single body that can do stills and video properly, and it is especially compelling for creators who rely on autofocus, colour grading, and a fully articulating screen. The A7 III remains a very strong buy because it gives you full-frame image quality, IBIS, 10fps bursts, and dependable performance for significantly less money. But if you are choosing one camera to keep for several years, the A7 IV is the more complete and more satisfying tool. Overall summary: the A7 III is the value pick, but the A7 IV is the better camera and the one to buy for most people.

Overall winner: Sony Alpha A7 Mark IV Camera Body with Kit Box.