Originally Posted by tribalstu
i'v got hold of a 550 ex quite cheap and was planning on using it on my D600 thing is i was trying to set it up for the 2nd curtain flash mode and it don't seem to work?.
is it to old for my new D600?
Did you mean the 600D (Canon) rather than D600 (Nikon)? If 600D, did you set the 2nd curtain sync on the flash itself (that's where you need to set it).