Enabling Rear Curtain Sync

I can't seem to enable this setting on the 6D or 70D. Currently using YN568 EXII and YN560 IV with YN622 triggers. What am I missing here? Under flash control settings, there only an option for high speed sync of first curtain sync. Please help.

According to Yongnuo, the yn-622 transceivers only support second-curtain sync if "wireless control" is disabled, i.e. you're using the 622 system to do simple triggering, not group-based control.

Leave out the 622. 2nd curtain should be available from the 'flash control' menu w/o the 622 mounted.

Bassat wrote in post #17827625
Leave out the 622. 2nd curtain should be available from the 'flash control' menu w/o the 622 mounted.

Then how would I trigger? Slave mode?

If you are only using the one flash, you don't need to do anything else. I have no idea how to trigger multiple 2nd curtain units.

Apparently not possible: https://photography-on-the.net/forum/showthre​ad.php?t=782817

Bassat wrote in post #17827654
If you are only using the one flash, you don't need to do anything else. I have no idea how to trigger multiple 2nd curtain units.

Apparently not possible: https://photography-on-the.net/forum/showthre​ad.php?t=782817

One flash but off camera. Possible?

ready2go wrote in post #17827801
One flash but off camera. Possible?

I don't believe so. On my 70D, as soon as I turn on 'wireless', the 1st/2nd curtain choice gets greyed-out. On the other hand...

I did try my Canon OC-flash cord. That works just fine with 2nd curtain on my 70D/580EX II. Maybe you can find a sufficiently long OC cord. The only other thing I can think of is PC-Sync cord. The 70D doesn't have a PC-sync port, but hotshoe/PC-sync adapters are available. I have no idea of the limitations on cord-length for either method.

http://www.amazon.com …s=hotshoe+pc-sync+adapter

ready2go wrote in post #17827401
Under flash control settings, there only an option for high speed sync of first curtain sync.

Second curtain will be available if you follow absplastic's response. That selection is available in the flash function settings menu.

absplastic wrote in post #17827536
According to Yongnuo, the yn-622 transceivers only support second-curtain sync if "wireless control" is disabled, i.e. you're using the 622 system to do simple triggering, not group-based control.

absplastic wrote in post #17827536
According to Yongnuo, the yn-622 transceivers only support second-curtain sync if "wireless control" is disabled, i.e. you're using the 622 system to do simple triggering, not group-based control.

oldvultureface wrote in post #17827939
Second curtain will be available if you follow absplastic's response. That selection is available in the flash function settings menu.

Yep! True and verified. Thanks, OVF! I just used a 622c on-camera (70D) and under the flash. Works like a charm. My response above was based on using a 622c-TX on camera.

Odd that one works and the other doesn't. Same with my G15. I can use any setup I want as long as I use a 622c on camera. Nothing works right (on the G15 setup) when I use the 622c-TX on camera.

ready2go wrote in post #17827401
I can't seem to enable this setting on the 6D or 70D. Currently using YN568 EXII and YN560 IV with YN622 triggers. What am I missing here? Under flash control settings, there only an option for high speed sync of first curtain sync. Please help.

It's not a YongNuo problem - it is how Canon have programmed the camera to issue 2CS only when "Wireless Mode" is OFF. (i.e. no off-camera, where an E-TTL command flash would wreck the 2CS image.)

Of course, the 622s can ignore that Canon limit as they use RF. But the camera must still issue the 2CS sync signal by being in Wireless=OFF.

oldvultureface wrote in post #17827939
Second curtain will be available if you follow absplastic's response. That selection is available in the flash function settings menu.

So I am able to enable rear curtain sync, but I just tested it and the flash fired before the end of the shutter. The example I used was 10 second shutter, but the flash fired right away and nothing at the end of the exposure. Isn't the flash suppose to fire at the end of the exposure?

ready2go wrote in post #17828205
So I am able to enable rear curtain sync, but I just tested it and the flash fired before the end of the shutter. The example I used was 10 second shutter, but the flash fired right away and nothing at the end of the exposure. Isn't the flash suppose to fire at the end of the exposure?

Very few 10s exposures will require any flash at all. The initial flash was ETTL preflash; normal and expected. Try it again with 1 second exposure, lowest ISO you have, and f/29 or however small you can make the aperture.

I'll have to get my hands on a 622. The only success I've had with 2CS with off-camera flash is using one flash on-camera to trigger my OCF. Trigger flash has only a little impact on the overall exposure but it does have it limits with how I can use it before I do get some bleed. It's always annoyed me that 2CS is so restricted.

Bassat wrote in post #17828219
Very few 10s exposures will require any flash at all. The initial flash was ETTL preflash; normal and expected. Try it again with 1 second exposure, lowest ISO you have, and f/29 or however small you can make the aperture.

I need at least a 5 second exposure. Trying to use sparklers to trace around a couple and have them be back lit at the end of the exposure.

Sample photo, but with first curtain:

https://drive.google.c​om …hZXNTVjA/view?u​sp=sharing

Just in case you can borrow or buy Odins, they also offer SCS for off-camera flash over radio.