see also:

• Sony NEX E-mount camera system
• Sony NEX FX full frame mirrorless cameras
• Sony FE E-mount full frame lenses
• tips on how to use the Sony a7 series cameras
• Autofocus lens adapters for Sony NEX E-mount cameras

• announced Oct 2019 compared with the Sony a9 full frame mirrorless camera original model, it has:
  • upgraded the BIONZ X Image-Processing engine and front-end LSI for improved autofocus speed and precision, face detection and EVF response
  • better AF performance and tracking
    • tuned the AF algorithms to achieve even more reliable tracking of fast and unpredictable moving subjects
    • better AF in strongly backlit situations
    • C-AF tracking works down to f/16
    • Real Time Eye AF tracking now in Movie mode (as with the Sony a7R IV)
  • improved image quality and colors, improved AWB, cleaner high ISO, improved dynamic range
  • anti-flicker mode (but only works in mechanical shutter mode)
  • glowing red AF frame (as in the a7RIV and earlier A99II cameras)
  • embedded voice memo
  • improved weathersealing
  • improved “low vibration” mechanical shutter, faster (10fps instead of 5fps), more quiet, shorter lag time, much better flash performance
  • ergonomics now matches the Sony a7R IV, much better, deeper grip, improved joystick
  • faster WiFi 2.4GHz as with a9 but now adds 5GHz and ac
  • 2 UHS-II card slots instead of only one being UHS-II
  • fast USB-C charging
  • USB 3.2 type C instead of USB 2.0
  • high speed 1000BASE-T LAN port
  • file renaming for movies
  • digital audio via the new MI Shoe Digital Audio Interface as with the Sony a7R IV
  • PASM dial lock
  • menu can now set 12 settings for stills and 12 settings for movies making customisation for each simpler to switch between and can save 10 sets of FTP settings to a SD card
  • improved battery efficiency albeit only slightly (500 shots vs 480 shots)
  • slightly improved IBIS now “5.5EV” instead of “5.0EV”
  • greater potential for future firmware improvements

• same 24.2-megapixel 35 mm full-frame stacked CMOS sensor from the a9
• BIONZ X processor
• 10fps mechanical shutter, up to 20fps electronic shutter with buffer of 361 JPEG, 239 RAW, 226 RAW+JPEG, 131 RAW (Uncompressed) (buffer is essentially same as the a9)
• electronic shutter 1/8th sec to 1/32,000th sec
• mechanical shutter 30sec to 1/8,000th sec, flash sync 1/250th sec
• 693 phase and 425 contrast detection points
• 5.5EV 5 axis IBIS but no pixel shift HiRes mode
• 3.6 million dot EVF (same as the a9)
• 1.4mdot rear LCD (same as the a9)
• hotshoe with digital audio (same as the a7RIV)
• 2 UHS-II card slots
• LAN terminal; USB 3.2
• 128.9mm x 96.4mm x 77.5mm
• 678g (1lb 8.0 oz)
• CIPA battery life 500 shots
• $US4499