The RX10 IV is much more than a solid, smart all-in-one compact — it packs enough ground-breaking innovations for even professionals to marvel at, from ultra-fast AF system of its kind, to legendary optics throughout its 25x zoom range, to extraordinarily precise, powerful image processing, and more.
This 25x optical zoom lens features remarkable 24-600mm17 extra-wide-angle-to-ultra-telephoto range plus macro capability, AA (advanced aspherical) and ED (Extra-low Dispersion) glass elements, ZEISS® T* Coating, and large F2.4-4 aperture. These help the camera to provide high optical performance for high resolution and beautiful bokeh.
Exmor RS™ CMOS sensor for speed
315-point focal-plane phase-detection AF provides for extraordinarily fast, precise autofocusing and tracking. Furthermore, the 20.1 MP (effective) 1.0-type stacked CMOS image sensor with DRAM chip enables up to 960 fps18 super-slow-motion shooting19 and up to 1/32000 sec. super-high-speed anti-distortion shutter.
High-speed BIONZ X image processing engine
Achieving higher-speed processing performance than its predecessor, the new BIONZ X image processing engine is remarkably reliable at capturing fast-moving subjects and continuous shooting of up to 24fps20. Its newly developed image-processing algorithm lets you capture high-quality images with less noise all across the sensitivity range while maintaining natural details.
High-density Tracking AF Technology
Tracking performance is highly reliable, as the RX10 IV is the first Cyber-shot camera with High-density Tracking AF Technology that activates AF points to cover the area around a subject with outstanding precision and stability.  AF points that appear on actual screen  AF algorithm (not shown on actual screen)
Fast Hybrid AF moves farther ahead
For its RX10 series camera debut, Fast Hybrid AF is capable of lightning-fast 0.03-sec21 autofocusing response. This ground-breaking AF system seamlessly integrates the superlative speed and tracking of focal-plane phase-detection AF plus the high accuracy of contrast-detection AF, and boosts the camera’s capabilities to focus, track and capture sharp, clear still images of subjects in all situations, even in the middle of fast, dynamic action.
Wide high-density 315-AF-point coverage
The world’s most focal-plane phase-detection AF points (315) cover approx. 65% of the entire image area of the RX10 IV’s new image sensor. This makes AF coverage widespread and dense enough to quickly capture subjects, such as small or fast-moving ones that are otherwise difficult to focus on, throughout the image area.  Phase-detection AF coverage (315 points)  Contrast-detection AF coverage (25 points)
Easy, natural Touch Pad and Touch Focus
With Touch Pad function, you can shift focus simply by sliding your finger across the LCD screen from one area to another, while you look at the viewfinder. Whether you make the shift according to finger motion distance (relative position) or the area of the frame that you touch on the screen (absolute position), shifting is smooth and easy. For Touch Focus, simply touch the LCD at the point of the image that you want to focus on.
Real-time Eye AF
Real-time Eye AF can capture intriguing facial expressions with highly precise eye detection that has been enhanced to automatically focus and track focus on a subject’s eye, even as the face moves or turns to a 3/4 view. This capability extends your freedom to frame a great shot.
AF streamlines focus operation
Faster autofocusing relies on smart functions including Focus Range Limiter22 which allows you to restrict focus to subjects that are 3m or farther away; AF-ON setting which lets you trip the shutter without the lengthier half-press focus sequence; and AF-A mode which automatically switches between AF-S (Single AF) and AF-C (Continuous AF) modes, according to changes in subject motion.
Focus Area Registration
Customise a button by assigning it to a frequently used focus area setting, then instantly recall that setting whenever you like. This can be handy if an ideal focus point frequently changes, for example, between strokes in a tennis match. Focus point as well as focus area can be set as desired for optimal focus performance for the scene being photographed.
Recall Custom Setting during Hold
Memorised exposure settings (shutter speed, aperture, AF area, etc.) can be assigned to custom buttons for temporary recall while the button is held. For example, if you shoot sports in a stadium, you might want to quickly capture a shot of the scoreboard, requiring a temporary change in exposure, and then go back to the action.
Continuous shooting capability expanded
The powerful combination of the Exmor RS 1.0-type image sensor and the BIONZ X image processing engine enables continuous shooting with AF/AE tracking at up to approx. 24fps20 for up to 24923 frames at a time. Decisive moments of even fast-moving action can assuredly be captured as a result.
Anti-distortion shutter for fast-moving subjects
Fast data readout from the Exmor RS image sensor noticeably reduces distortion in images of fast-moving subjects such as the kicking of a ball. The anti-distortion electronic shutter achieves shutter speeds as fast as 1/32000 second.  Conventional electronic shutter RX10 IV electronic shutter
Silent shooting24 for sensitive situations
At performances, when close to wildlife, and in other noise-sensitive situations, you can shoot in silence, even during continuous shooting, by muting the camera’s shutter sound with a couple of simple settings ("Shutter type: Electronic" and "Audio signals: Off").
Shooting movies with Fast Hybrid AF
When shooting movies, this advanced two-times-faster25 AF system makes focusing smoother and simpler, and enables the same wide-ranging use of phase-detection AF as when shooting still images. Drive speed / AF tracking settings can be made to express focus in creative ways. For example, by shooting at the low end of the AF speed range, you can achieve distinctive slow focus effects.
And much more.