TTL Passthrough (Pentax X-TTL)
I have not been able to get TTL Passthrough working : The flash will not fire, however the flash zoom works in response to lens zooming.
TTL Passthrough worked for me previously using the Multi-brand firmware on the same V6II unit and the exact same equipment.
This is the equipment : V6II with PEN.A.001 (mounted on the camera in Tx mode) / Pentax K7 camera / Pentax AF-540FGZII (mounted on the V6II) / Pentax D-FA type autofocus lens
The V6II is set with TTL Passthrough activated (long press on the Menu button, TTL symbol shows on the left side of display) ..... this is confirmed by checking the menu item within the Function Menu ... "On".
All connections between camera, V6II and flash are tight and secure . I have been using this equipment for nearly a year now with no communication problems, so I don't believe it is anything like that. The flash head zooms when I zoom the lens, and this is consistent and works correctly. however the flash never fires. It is charged and the ready light illuminated. This flash works normally when mounted directly on the camera, plus its Test button produces a full flash pop.
I wonder if this problem exists for others, or is it perhaps restricted to the K7 camera ?