AF-540FGZ won't talk with Sigma EM-140 DG

dragra · 05-17-2013, 10:17 AM

I use the Sigma EM-140 DG mounted to the lens and want to trigger a Pentax AF-540FGZ for backlight wirelessly.

Is this possible? (Without any aditional trigger/receiver)

Last edited by dragra; 05-17-2013 at 12:08 PM.

**JimJohnson** · 05-17-2013, 02:29 PM

If The Definitive Guide - Pentax P-TTL Flash Comparison is correct, then the EM-140 DG is capable of acting like a P-TTL wireless controller. Make sure the EM-140 DG is set for P-TTL and that it and your Pentax flash are using the same wireless channel.

dragra · 05-17-2013, 10:22 PM

Originally posted by JimJohnson

If The Definitive Guide - Pentax P-TTL Flash Comparison is correct, then the EM-140 DG is capable of acting like a P-TTL wireless controller. Make sure the EM-140 DG is set for P-TTL and that it and your Pentax flash are using the same wireless channel.

Jim, thanks for the response. Yes it works, you can also set the power ratio between the flashes.

05-17-2013, 10:17 AM	#1
dragra Senior Member Join Date: Dec 2010 Location: Ljubljana Photos: Albums Posts: 238	AF-540FGZ won't talk with Sigma EM-140 DG I use the Sigma EM-140 DG mounted to the lens and want to trigger a Pentax AF-540FGZ for backlight wirelessly. Is this possible? (Without any aditional trigger/receiver) Last edited by dragra; 05-17-2013 at 12:08 PM.

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05-17-2013, 02:29 PM	#2
JimJohnson Loyal Site Supporter Join Date: Jan 2012 Location: Summer:Lake Superior - Michigan Winter:Texas Hill Country Photos: Gallery Posts: 2,774	If The Definitive Guide - Pentax P-TTL Flash Comparison is correct, then the EM-140 DG is capable of acting like a P-TTL wireless controller. Make sure the EM-140 DG is set for P-TTL and that it and your Pentax flash are using the same wireless channel.

05-17-2013, 10:22 PM	#3
dragra Senior Member Join Date: Dec 2010 Location: Ljubljana Photos: Albums Posts: 238 Original Poster	Originally posted by JimJohnson If The Definitive Guide - Pentax P-TTL Flash Comparison is correct, then the EM-140 DG is capable of acting like a P-TTL wireless controller. Make sure the EM-140 DG is set for P-TTL and that it and your Pentax flash are using the same wireless channel. Jim, thanks for the response. Yes it works, you can also set the power ratio between the flashes.