The Sony RX10 IV keeps the same body style and sensor and lens combo that made the previous version so successful -- but steps up with some serious speed improvements. The combination of the big zoom lens, compact body style and fast speed makes the Sony RX10 IV excellent for a number of different shoots, including travel and sports.
At the heart of the camera is the same 20.1 megapixel one-inch sensor found in the RX10 III. The sensor is larger than those found in cheaper travel zoom cameras and that's paired with a 25x zoom lens, a good range for a sensor of this size. The lens also has a wide f/2.8 to f/4 aperture range that's brighter than most as well.
Where the IV begins to differ from the III is speed. The RX10 IV boasts category-leading, .03 second autofocus, according to Sony and thanks to a 315 point phase detection autofocus system. Paired with an impressive 24 fps burst and the RX10 IV should be excellent for action. The shutter speed also has an impressive 1/32000 limit and uses an anti-distortion shutter to prevent distorting moving subjects.
Video should also be excellent with a hybrid video autofocus system and 4K resolution. Slow motion is available at lower resolutions, to slow down that action up to 40x.
The body style remains similar to others in the RX10 series with a DSLR-like control scheme and size, despite the fixed lens. While larger than a compact camera, the camera is smaller than a DSLR if it was paired with a lens with similar zoom capabilities. New to the series, the touchscreen on the back of the camera also tilts.
The Sony RX10 IV boasts impressive specifications -- but a high price to go with it, retailing for around $1,700. While the RX10 IV boasts several industry leading specifications, the Panasonic FZ2500 should also be closely compared for its lower price point.