Yongnhuo RF603N II do not trigger Pentax 360FGZ

gerardbaron · 12-29-2017, 11:34 AM

I just purchased two Yonghuo RF603N II. They do not trigger my Pentax 360FGZ.
I try with a Nikon flash: no problem.
Any suggestions before I return those transmitters.
Thanks

08amczb · 12-29-2017, 12:52 PM

My Yongnou 605 does the same with my Pentax 540FGZII. But a very few times it worked and my keys triggers the flash when I connect the middle pin with the ground, so I think the problem is not with the radio triggering and not with the method. I think (without messurements) the electrical resistance of the yongnou trigger in triggering state is too high for the pentax flash. I'am considering to add a thyristor between the trigger and the flash. It might solve the problem.

**Ex Finn.** · 12-29-2017, 03:50 PM - **2 Likes**

Originally posted by gerardbaron

I just purchased two Yonghuo RF603N II. They do not trigger my Pentax 360FGZ.
I try with a Nikon flash: no problem.
Any suggestions before I return those transmitters.
Thanks

My RF603N II does the same thing also, this is with the AF540FGZ. The way to make it work is to slide the flash back couple millimeters.
The 603N II hot shoe is little different from Pentax hot shoe, it is for "N" after all.
The center contact on the YN is slightly smaller and the YN does not have the little back-stop like the pantax cameras have, this allows the flash to slide too far in causing the center contacts to miss and not make contact.

gerardbaron · 12-30-2017, 06:45 PM

Thank you all for your advice.
The trigger works as it is only with flash in A mode, when pull 2mm it works now in M mode and A mode.
I have now to test for exposure and ISO. (Speed 125)
Have a very good new Years.

**Ex Finn.** · 12-30-2017, 08:31 PM

Originally posted by gerardbaron

Thank you all for your advice.
The trigger works as it is only with flash in A mode, when pull 2mm it works now in M mode and A mode.
I have now to test for exposure and ISO. (Speed 125)
Have a very good new Years.

Good New Years to you also.

gerardbaron · 01-07-2018, 08:54 AM

Do you have any suggestions to setup the K-1 and the Pentax 360 with yunguon trigger.
In order to get good exposure at f:2.8 to 4.5
Thanks

08amczb · 01-07-2018, 09:10 AM

Flash-subject distance matters a lot. Without the intented ambient-flash exposeur ballance and lighting type it's hard to tell what will do for you.

In general I shoot family events in M mode with sync speed, F5.6, ISO400 and one or two off camera Yongnou 660 at 1/4 power pointing to the ceiling. This setup works in indoors for me in general, but not always.

**Ex Finn.** · 01-07-2018, 05:34 PM

I hardly ever use the AF540FGZ after getting 4 YN 560 IV flashes and the YN 560 TX controller.
But yes, full manual, camera at the sync. speed and usually around f 5.6 or thereabouts, flashes firing at no more than 1/2 power and adjusting ISO as necessary.
This does not really relate to your situation but might give an idea.

12-29-2017, 11:34 AM	#1
gerardbaron Senior Member Join Date: Apr 2011 Location: Mississauga (Canada) Photos: Albums Posts: 139	Yongnhuo RF603N II do not trigger Pentax 360FGZ I just purchased two Yonghuo RF603N II. They do not trigger my Pentax 360FGZ. I try with a Nikon flash: no problem. Any suggestions before I return those transmitters. Thanks

01-07-2018, 08:54 AM	#6
gerardbaron Senior Member Join Date: Apr 2011 Location: Mississauga (Canada) Photos: Albums Posts: 139 Original Poster	Use of the trigger and 360 Do you have any suggestions to setup the K-1 and the Pentax 360 with yunguon trigger. In order to get good exposure at f:2.8 to 4.5 Thanks

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12-29-2017, 12:52 PM	#2
08amczb Veteran Member Join Date: Dec 2013 Posts: 796	My Yongnou 605 does the same with my Pentax 540FGZII. But a very few times it worked and my keys triggers the flash when I connect the middle pin with the ground, so I think the problem is not with the radio triggering and not with the method. I think (without messurements) the electrical resistance of the yongnou trigger in triggering state is too high for the pentax flash. I'am considering to add a thyristor between the trigger and the flash. It might solve the problem.

12-29-2017, 03:50 PM - 2 Likes	#3
Ex Finn. Site Supporter Join Date: Nov 2007 Location: Southern Maryland. Espoo. Kouvola. Photos: Gallery \| Albums Posts: 7,975	Originally posted by gerardbaron I just purchased two Yonghuo RF603N II. They do not trigger my Pentax 360FGZ. I try with a Nikon flash: no problem. Any suggestions before I return those transmitters. Thanks My RF603N II does the same thing also, this is with the AF540FGZ. The way to make it work is to slide the flash back couple millimeters. The 603N II hot shoe is little different from Pentax hot shoe, it is for "N" after all. The center contact on the YN is slightly smaller and the YN does not have the little back-stop like the pantax cameras have, this allows the flash to slide too far in causing the center contacts to miss and not make contact.

12-30-2017, 06:45 PM	#4
gerardbaron Senior Member Join Date: Apr 2011 Location: Mississauga (Canada) Photos: Albums Posts: 139 Original Poster	Thank you all for your advice. The trigger works as it is only with flash in A mode, when pull 2mm it works now in M mode and A mode. I have now to test for exposure and ISO. (Speed 125) Have a very good new Years.

12-30-2017, 08:31 PM	#5
Ex Finn. Site Supporter Join Date: Nov 2007 Location: Southern Maryland. Espoo. Kouvola. Photos: Gallery \| Albums Posts: 7,975	Originally posted by gerardbaron Thank you all for your advice. The trigger works as it is only with flash in A mode, when pull 2mm it works now in M mode and A mode. I have now to test for exposure and ISO. (Speed 125) Have a very good new Years. Good New Years to you also.

01-07-2018, 09:10 AM	#7
08amczb Veteran Member Join Date: Dec 2013 Posts: 796	Flash-subject distance matters a lot. Without the intented ambient-flash exposeur ballance and lighting type it's hard to tell what will do for you. In general I shoot family events in M mode with sync speed, F5.6, ISO400 and one or two off camera Yongnou 660 at 1/4 power pointing to the ceiling. This setup works in indoors for me in general, but not always.

01-07-2018, 05:34 PM	#8
Ex Finn. Site Supporter Join Date: Nov 2007 Location: Southern Maryland. Espoo. Kouvola. Photos: Gallery \| Albums Posts: 7,975	I hardly ever use the AF540FGZ after getting 4 YN 560 IV flashes and the YN 560 TX controller. But yes, full manual, camera at the sync. speed and usually around f 5.6 or thereabouts, flashes firing at no more than 1/2 power and adjusting ISO as necessary. This does not really relate to your situation but might give an idea.