How do I enable TTL Pass Through on my V6 TX unit?
edited May 2014 in V6 Announcements and FAQ
Press and hold the MENU button until you see TTL PASS THROUGH appears briefly on screen. A “TTL” logo will be displayed on the bottom left of the LCD panel on the main screen.
To enable TTL pass-through in the V6 TX, please mount the 580EX directly to V6 and 5DM3 (flash > V6 > camera). Turn on the V6 at TX, press and hold the MENU button until the LCD show the TTL pass-through indicator at the left bottom corner where the channel indicator used to be.
In TTL pass-through mode, the V6 TX cannot control the power level of the flashes attached.
To disable the TTL pass-through mode, pree and hold MENU button for 2 seconds. The TTL pass-through indicator will be replaced by the channel indicator on the LCD.
I hope this is helpful. Thank you.
A TTL flash mounted on-camera, the camera would do its thing of through-the-lense metering and tell the flash to fire at an adequate output. Now most people don't need to tinker with the max +3 / -3 EV adjustment on the flash outputs. But if you do, that's at max you could do in terms of controlling the power - either directly on the flash unit or from the camera menu.
Now with the V6 mounted between camera and the flash:
The flash basically functions just the same, where you could only have the same amount of controls of +3 / -3 EV, and this is not done from the V6, but the usual way of adjusting directly on the flash.
All we are saying here is that you cannot adjust the on-camera TTL flash power outputs from the V6 Adjustment Dial as you would with off-camera flash units. And the on-camera TTL flash would do its own thing of automatic exposure metering.
@Jaap, please see my reply in the other post;
Thank you and I hope the above helps!
I have also set the flash profile on my V6 for my system dedicated flash (in my case a Pentax AF-540FGZ). I noticed that when holding the Menu button in order to activate TTL pass-through, that I briefly see the information 'Pentax AF2' appear, then 'TTL Pass-through'.
So I know that the profile is correct for my Pentax flash. But I am not able to control the Pentax manual power from the V6 controls. Am I right to think that if I deactivate TTL pass-through that I should be able to adjust the manual power output of the flash on the V6 from the V6 ? It's just because it would be quicker than using the flash dial and buttons.
I wonder, does the flash need to be set itself to Manual mode? One issue is that of the group setting for the on-camera flash ...ie, there isn't one! Is that why it doesn't work? Am I missing the correct way to tell the V6 to communicate with the flash attached to it?
Many thanks for any info ....
If you are using TTL Pass Through then the flash will fire automatically according to the camera's metering. In that case, you won't need to adjust the flash power outputs manually - neither on the flash nor on the V6.
On the flip side, if you want to manually control the power output of the on-camera flash (Camera > V6 > AF-540FGZ) then you should not enable TTL Pass Through. You can adjust the flash power but holding the MENU button and scrolling the Selection Dial. Here's demo video I found.
For both cases you will still need to select a flash profile. You should select one whenever you have that option.
Let me know if it works for you!
Unless you have the FGZ II model, you should select the profile for the standard FGZ (just "AF540F", not "AF540F2").
Yes, just deactivate TTL pass-through and then adjust the power of the flash by pressing the menu button and simultaneous turning the dial.
The flash still needs to be in TTL mode.
Probably not much different to making the adjustments directly in manual mode on the flash itself. Thanks for clarifying it all .I have both AF540 'MkI' and 'MkII' models so need to change the profile as needed.