Canon MR-14EX II Macro Ring Lite Flash

wayno said:
Whilst RT master capability for this should be built in, in reality I'm not sure whether it offers a huge advantage over optical master in the case of macro work. I would have thought...?

Rarely, but it happens. Shooting water drops with a slave flash behind foam core, I've had to use mirrors to get the slave to fire as not enough light from the twin flash bounced in the right direction.

Moreover, there's the future. I wouldn't expect macro flash updates all that frequently, but smaller flashes get updated more often. As the RT system gains prevalence, Canon may release small slave-only units (270/430) with only radio and no optical triggering mode.
 
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