Sony’s a7 III Mirrorless Delivers 15 Stops of Dynamic Range and 10 FPS Shooting

February 27, 2018

Sony is updating its entry-level full frame mirrorless camera with a powerful new processor, a high dynamic range image sensor and much more.

The a7 III features a new 24-megapixel back-illuminated Exmor R CMOS sensor with up to 15 stops of dynamic range. It has a new front-end LSI and updated BIONZ X processor to improve and speed along image processing. Thanks to this computation punch, you’ll enjoy a native ISO range of 100-51,200 (expandable to 50-204,800).

As for autofocusing, 93 percent of the frame is covered by AF points, and there are a lot of them: 425 contrast AF points and 693 focal plane phase detect AF points. According to Sony, both low light focusing speed and tracking speed have been doubled compared to the prior model.

You’ll enjoy burst shooting speeds up to 10 fps with AF-C using either a mechanical or electronic shutter. You can store up to 177 JPEGs, 89 compressed RAW or up to 40 uncompressed RAW images during burst shooting. Sony says that while images are writing to buffer memory several camera functions, such as playback and the menu, will remain accessible.

There’s now a joystick on the camera body to help you select AF points or you can use the 3-inch touch screen to select your focus point.

Like the other models in the a7 line, the a7 III features 5-axis in-body image stabilization good for up to five stops of correction. It has dual card slots, with one slot supporting speedy UHS-II SD cards.

Rounding out the a7 III’s features:

  • Eye AF (including in AF-C mode)
  • 8 fps burst shooting in live view mode
  • anti-flicker mode for shooting in fluorescent lighting
  • 4K (3840 x 2160) recording across the full width of the sensor with S-Log2/3 profiles
  • a new HLG (Hybrid Log-Gamma) picture profile for HDR video
  • full HD recording up to 120 fps
  • 710 shots per charge battery life, per CIPA
  • dust and moisture-resistant build
  • 11 customizable buttons
  • 2.3-million dot OLED viewfinder
  • Wi-Fi and USB-C (USB 3.1 Gen 1)

The a7 III will ship with Sony’s Imaging Edge software for RAW processing and tethered shooting. The company says the newest version of the software (1.1) improves data transfer speed and responsiveness during RAW editing.

Look for the a7 III in April for $2,000 for the body or for $2,200 in a kit with the FE 28‑70 mm F3.5‑5.6 kit lens.