Yes you will need the SLFA with the 430 or for any flash that doesn't have a PC port. I have a Vivitar 285HV that I has to be fitted with the SLFA. I am using the CST and the CSRB+ units.
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Canon 50D w/ BG-E2N Grip, Sigma 18-50 f2.8 EX, Canon 70-200 f2.8 L IS, Canon 24-105 f4 L IS, Canon 50 f1.8 II, Canon 580EX II
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