If you're thinking about making the jump from the Sony A7 III to the A7 IV, there are a few upgrades that might catch your interest. One of the big ones is the ISO range. The A7 IV has an ISO range that starts at 100 and can stretch all the way up to 204,800, which gives you more room to maneuver in low-light situations than the A7 III. This means you're likely to get better shots when the lighting is less than ideal.

From what our research shows, the standard ISO range of up to 51,200 usually works well in most good lighting conditions. But having that extended range up to 204,800 can really help when you're dealing with very low-light environments. Of course, cranking up the ISO that high can lead to some noise, but the A7 IV still manages to hold its own, delivering solid pictures at ISO 12,800 and even 25,600.

When you get closer to the camera's native maximum of ISO 51,200, you might start to see more noise in your images. Still, based on what we've found from various sources, the A7 IV performs better at higher ISOs compared to a lot of other cameras out there. Naturally, in really dim light or at the highest ISO settings, some noise and image quality drop are normal for digital cameras.

On top of this, the A7 IV brings better autofocus, improved video features, and nicer color output to the table. Its autofocus system has been upgraded to be faster and more reliable, which is great for capturing quick-moving action. Plus, the new menu system and body design make it easier to navigate and handle.

Overall, the A7 IV has some nice upgrades over the A7 III, especially for those who often shoot in tricky lighting. Just keep in mind that to get the best images, it's a good idea to try and keep the ISO settings moderate when possible.

The Sony A7 IV is quite solid for video, but there are a few things to consider. According to the manufacturer's specs, it can shoot 4K video at up to 60fps in 10-bit 4:2:2 color, which is generally great for most situations.

There is a catch, though—the camera uses a Super 35 crop at 4K 60fps. Basically, this means you won't be using the full-frame sensor, resulting in a cropped image, similar to an APS-C size. If you're aiming for that full-frame look in your video work, this is worth considering.

On the positive side, the camera offers a good balance. It supports full-frame 4K up to 30p video with full sensor readout and no pixel binning, which results in sharp, clear video quality—something most videographers will appreciate.

Our research also notes its excellent autofocus and impressive color accuracy, bolstering its reputation as a versatile hybrid camera. Although it lacks 120fps 4K video—a feature available in more high-end models like the Sony Alpha 1 or A7S III—the A7 IV still offers plenty of capabilities for many creators.

Aside from frame rates, the A7 IV does well with dynamic range and low-light conditions. With its new 33MP sensor and the BIONZ XR processor, it handles tricky lighting and high-contrast scenes effectively.

It also has flexible color profiles like S-Log3 and S-Cinetone for those who get into post-production and editing. These features are great for videographers planning to do extensive color grading.

So, is the Sony A7 IV good for video? Absolutely, it’s a great option for a variety of video needs.

However, if you specifically need 120fps at 4K without cropping, you might have to look at other models that offer that specific feature.

The autofocus on the Sony A7 IV is impressive, from what we've gathered. Sony cameras are known for their top-notch autofocus tech, and this model continues that trend. The A7 IV uses a phase-detection system with 759 AF points covering most of the image area, and it runs on the BIONZ XR processor, which you’ll also find in their higher-end cameras. This setup makes the autofocus quick, reliable, and great at tracking moving subjects.

According to our research, features like Real-Time Tracking and Real-Time Eye AF are impressive, especially useful if you’re into wildlife or portrait photography. It performs well even under low light, which many find helpful in varied lighting situations.

For video, the autofocus works well too. It handles subject tracking and transitions smoothly, which is great if you’re recording moving subjects. The autofocus stays effective in Full HD, and the camera shoots 4K video at up to 60p.

However, there’s a crop to Super 35 mode at 60p, so if you’re a full-frame purist, that might bother you a bit. Still, the quality of the 10-bit 4:2:2 internal recording is a standout, offering rich color depth.

Overall, the A7 IV’s autofocus system is solid, making it a great pick for both photographers and videographers who want speed and accuracy. Whether you're snapping quick action shots or detailed portraits, the autofocus on this camera seems designed to meet professional needs and inspire creative work.