Does Olympus EPL work with sTTL?

[PHIL RUDIN]

In my tests regarding battery life with the E-PL1 shooting macro with the 14-42 and a close-up lens I got over 400 shots using S-TTl with the Inon S-2000 and Inon Z-240 strobes before I needed a recharged camera battery. With a wide angle lens I would guess you would get even more shots because less power is being used on average to focus the lens and power the on-board strobe.

Phil Rudin

 

[watboy]

Thanks Phil. So the correct camera setting for S-TTL would be Manual mode, Flash set on Fill Mode. Fill Mode is internal flash TTL mode. I'm still baffled with what the following Flash Customize setting (In custom setting F) does...

"When set to ON, it will be added to the exposure compensation value and flash intensity control will be performed"

In my tests regarding battery life with the E-PL1 shooting macro with the 14-42 and a close-up lens I got over 400 shots using S-TTl with the Inon S-2000 and Inon Z-240 strobes before I needed a recharged camera battery. With a wide angle lens I would guess you would get even more shots because less power is being used on average to focus the lens and power the on-board strobe.

Phil Rudin

 

[bvanant]

Watboy:
You can't have both TTL and low power for battery conservation. You can set the camera flash to manual at its lowest power and use your inon strobes in manual and you should be fine but NO ttl. For TTL to work you need to have the camera firing at whatever power it thinks it needs to set the scene.
Bill

 

[watboy]

Watboy:
You can't have both TTL and low power for battery conservation. You can set the camera flash to manual at its lowest power and use your inon strobes in manual and you should be fine but NO ttl. For TTL to work you need to have the camera firing at whatever power it thinks it needs to set the scene.
Bill

I am no longer trying to go for Low Power and TTL. I am merely trying to go for TTL and how to set TTL to On for the internal flash. Or more precisely, in Fill Mode, is the internal flash giving a pre-flash? Inon's website implies that internal strobe TTL is a feature that needs to be enabled.

The feature "When set to ON, it will be added to the exposure compensation value and flash intensity control will be performed" is this the feature to enable TTL? I think this is just bugging me the most, what does this setting do?

 

[bvanant]

For TTL to work at all there needs to be a pre-flash. On land the built in flash sends out a test flash and looks at the returning light and then sets the power of the flash to get the exposure you asked for (i.e. if you have a +1 exposure compensation then the flash will send out more light compared to no compensation). Underwater it is the same except the camera sends the pulse to the strobe that sends the test pulse then the camera sets the real flash power that sends it to the strobe that then sends out the real pulse. What part don't you get and why don't you set up a scene on your kitchen table (at night) and see how things work from there. In general, I think that you need the custom setting at all.
Bill

 

[fatbadak]

Doesn't work with "FILL"....has to be "RC ON" in the camera menu and enable TTL. Then it works....it took me 40 hrs (to and fro from Saigon -Nha Trang) on a bus here in Vietnam over 2 weekends to work it out after reading tis thread. Now it works as advertised

 

[watboy]

Doesn't work with "FILL"....has to be "RC ON" in the camera menu and enable TTL. Then it works....it took me 40 hrs (to and fro from Saigon -Nha Trang) on a bus here in Vietnam over 2 weekends to work it out after reading tis thread. Now it works as advertised

Are you sure? Inon's website specifically states sTTL is incompatible with RC mode. I shoot in manual mode with flash to fill and it works. The green light pops on after a shot on my z240 confirming that sTTL is working.

 

[Wisnu]

Indeed, the Olympus RC data transfer wire less will not work with any underwater strobes (including Inon) except the Olympus strobe UFL-2 or housed flash such as FL-36R, FL-50R and Metz 58AF-1/2 for oly. Not sure the benefit of RC mode for underwater though.

I also have no problem to shoot in simulated TTL either with Inon D2000 or YS-01. The green light, confirm the strobe succesfully mimic the camera flash.