You can use this bulkhead with the YS-D1's. You'll still be shooting manual. The center pin is the 6th pin and you'll need a 6 pin strobe cable (and the attached TTL converter) to realize any differences. You won't get eTTL by just going up to a 6 pin bulkhead.
The new bulkhead system is easy to replace. You simply need to remove the o-ring inside the housing the holds the bulkhead in, then pop out the old one for the new one. The circuit board is held in place by small screws. Unplug the bulkheads from the board, remove the board and hotshoe, replace the bulkheads and put in the new board and hotshoe.
Edited by Stewart L. Sy, 08 April 2013 - 06:32 AM.
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