Originally posted by Ramboner Hi, I've been trying to play around with rear curtain sync or trailing curtain, etc! I can't get it to work.. at all!
Note that rear-curtain sync will only work in conjunction with the Cactus V6, if you activate the TTL pass-through option on the V6 and use the flash on top of the on-camera V6.
The V6 are not "P-TTL over radio" triggers and since Pentax made rear-curtain sync a P-TTL feature, you won't get native rear-curtain support when using the V6.
However, you can use a manual delay on the V6 (on either the transmitting V6 or on the receiving V6) to achieve a rear-curtain effect. You will have to roughly set the shutter speed minus the sync-speed (1/180s) as a delay in milliseconds, e.g., 1/30s becomes 27ms, so that the flash is delayed until the rear-curtain is about to move.