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Rear curtain sync with cowboy NPT-04 wireless trigger

Arkayem

Richmond Hill, GA (Savannah), US
6131 posts

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"RE: Rear curtain sync with cowboy NPT-04 wireless trigger"

Arkayem Moderator Awarded for his high level skills in flash photography Charter Member
Tue 11-Dec-12 12:57 PM

>Thanks for the follow up Russ. So, I tried my tests again
>and did indeed confirm that the YNU was firing correctly.
>Here's what I actually see as the sequence..
>
>i. Pre-flash fires from camera, pop up flash
>ii. YNU flash fires during pre-flash
>iii. Wait for 2 seconds
>iv. YNU flash fires again at the end of the rear curtain.
>i'm using the YNU-560 flash, if it makes any difference.
>
>Also, if I change the pop up flash from "--" to
>"M", the same behavior occurs.

Now I think I understand what is happening.

You must have the YNU set to a fairly low power, so that it fires on the preflash, and it is recycling just enough to fire again on the main flash. I think you will find that if you shorten the shutter, and/or increase the power of the YNU, it will fire on the preflash, but will not have time to recycle, so it will not flash again on the main flash.

Russ
Retired Professional Photographer
Nikonian Moderator
Russell MacDonald Photography
Nikon CLS Practical Guide

A general, generic topic Rear curtain sync with cowboy NPT-04 wireless trigger [View all] , sunilchand , Sun 09-Dec-12 03:31 AM
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