P-TTL and fill flash
I have purchased two V6ii units.
One is going to be used as receiver for my Pentax AF540FGZ. The other as tranceiver on the camera.
This should be straight forward, provided I can update to the right firmware for Pentax and the flash.
But then I want to place a FILL FLASH on top of the tranceiver.
This fill flash don't have to be a TTL flash, but hopefully I can use a flash with an "A-mode", utilizing a built-in sensor - or simply use it in manual mode.(I wish this fill flash to give less power - appr. 1/2 or 1/3 - of the key light flash (AF540FGZ).
My question is:
Will the Cactus V6ii tranceiver be able to fire the "on top of the tranceiver" fill flash? Or do I need a third Cactus receiver?
Comments
Brand Manager
Brand Manager
Bear in mind that my recent testing using the V6II, 'X-TTL' PEN.A.01 firmware, Pentax K7 camera, and Pentax AF-540FGZII on top of the V6II (Tx mode) has not been working for TTL Passthrough. TTL Passthrough has always worked for me before with the 'multi-brand' firmware, but it does not now work with the X-TTL version. I am going to report this to Cactus on the appropriate section of this forum. Obviously this may be an isolated problem with my particular combination only.
However, there should be no reason for concern with the multi-brand firmware, assuming you are not looking for Radio TTL, only Manual.
Antonio's response above seems to answer my concerns about the Auto Thyristor mode and TTL Passthrough .... sounds like a correctly working system should send the trigger signal through to a flash working in Auto mode.
Brand Manager
Brand Manager
HAve a Pentax AF360FGZ on top of the tranceiver as fill flash - and a AF540FGZ on the receiver?
Or: Will I need a third V6ii,(no TTL pass through) in order to get both flashes working in TTL mode
The Explanation
You can use <TTL Pass Through> on Multi-brand HSS firmware (e.g. 1.1.013).
Note: Actually on X-TTL firmware (e.g. PEN.A.001) there's no longer a TTL Pass Through per se, it is more like switching from M (manual control) to TTL mode for the on-camera flash.
In Short...
The Answer
Both flashes meaning one of the flash will be off-camera, and in that case, you will have to use PEN.A.001 on all V6 II units.Thanks and hope this helps.
Brand Manager