Sony has released a new firmware update for its A7II, A7RII, A7SII, A6300 and A6500 mirrorless cameras.

The firmware version 4.0 for Sony A7II and A7RII includes several improvements and fixes. Sony A7SII upgraded to version 3.0.

Sony released firmware updates with lots of new functions including FE 100-400mm GM OSS support, better overheating control, improved Flexible Spot AF function, improves release time lag when wireless flash is used, adds “Live View Display” custom button assignable support and visible light LED assist with external flash for AF (HVL-F45RM) on a7II, a7RII, a7SII，and wait for it….a “star-eater” fix for a7RII.

• Sony FE 100-400mm GM OSS support (a7II, a7RII, a7SII, a6300, a6500)
  
• Better overheating control (a7II, a7RII, a7SII, a6300)
  
• Improved Flexible Spot AF function (a7II, a7RII, a7SII)
  
• Improved release time lag when wireless flash is used (a7II, a7RII, a7SII)
  
• Adds “Live View Display” custom button assignable support (a7II, a7RII, a7SII)
  
• Adds Visible light LED assist with external flash for AF with HVL-F45RM (a7II, a7RII, a7SII)
  
• “Star-eater” Long Exposure NR fix for (a7RII)

List of Improvements:

Sony a7RII and a7SII

Adds “Auto Pwr OFF Temp.” function(*)

• (*)If the same part of your skin touches the camera for a long period of time while using the camera, even if the camera does not feel hot to you, it may cause symptoms of a low-temperature burn such as redness or blistering.
  Pay special attention in the following situations and use a tripod, etc.
  • When using the camera in a high-temperature environment
  • When someone with poor circulation or impaired skin sensation uses the camera
  • When using the camera with the [Auto Pwr OFF Temp.] set to [High]
• Improves operability of the camera:
  1. Improves operability when AF area is set to flexible spot
     Refer to here for details.
  2. Adds “Live View Display” into custom button assignation
  3. Adds “Set File Name” function
• Supports visible light LED in external flash for AF (HVL-F45RM)
• Improves release time lag when wireless flash is used
• Optimizes exposure algorithm during focusing when [Live View Display] is [Setting Effect OFF]
• Improves image quality when Long Exposure NR setting is OFF
• Improves overall stability of the camera

Sony a7II

• Improves operability of the camera:
  1. Improves operability when AF area is set to flexible spot
     Refer to here for details.
  2. Adds “Live View Display” into custom button assignation
  3. Adds “Set File Name” function
• Supports visible light LED in external flash for AF (HVL-F45RM)
• Improves release time lag when wireless flash is used
• Improves overall stability of the camera

Sony a6500

• Supports new lens “SEL100400GM”
• Optimizes image stabilization performance in movie mode

Sony a6300

• Adds “Auto Pwr OFF Temp.” function(*)
  (*)If the same part of your skin touches the camera for a long period of time while using the camera, even if the camera does not feel hot to you, it may cause symptoms of a low-temperature burn such as redness or blistering.
  Pay special attention in the following situations and use a tripod, etc.
  • When using the camera in a high-temperature environment
  • When someone with poor circulation or impaired skin sensation uses the camera
  • When using the camera with the [Auto Pwr OFF Temp.] set to [High]
• Supports new lens “SEL100400GM”
• Modifies aspect of guide frame display in LCD (2.35:1 mode)
• Improves overall stability of the camera

Download Links:

Sony a7II FW 4.00: MAC | WIN
Sony a7RII FW 4.00: MAC | WIN
Sony a7SII FW 3.00: MAC | WIN
Sony a6500 FW 1.03: MAC | WIN
Sony a6300 FW 2.00: MAC | WIN

Source:
https://briansmith.com/sony-releases-a7ii-a7rii-a7sii-a6300-a6500-firmware-updates/