Comments about Wein Wein SSL-D Ultra Slave 3000' Range H-Prong (Household) - For Digital Cameras:
In digital era of pre-flash TTL flash metering, how do you get a flash with a PC connection to ignore the pre-flash and fire as slave? Use this Slave. It extends the functionality of many flash units, even those that have a conventional slave switch.
Getting the DIP switch positions correct may be a bit arcane, and require trial and error depending on the flash. It is expensive compared to a regular slave trigger, but it does what it's advertised to do.