D2 | New in Firmware A6
• Improved fan controller to reduce standby noise.
• Added sync filter to avoid unintentional flash triggering
• Minor bug fixes
B1/B1x | New in firmware version E2
• Fixed bug that could cause big TTL under- exposure.
• Bug fix to restore the temporary display indication after a HSS flash.
TTL-C | New in firmware version C4
• Added support for EOS 800D.
• Faster shutter response and FPS in TTL and HSS mode with EOS 1D MkII and EOS 5D MkIV.
