Originally posted by mattdm - Radio wireless control built in. No one else has this, and while optical wireless P-TTL works pretty well (better than some loud voices might have you think), radio would be better in a number of ways. And, this is particularly important to Pentax, because while some third-party triggers now support the big two brands, they're unlikely to do the same for Pentax.
Well, looks like
Canon got to this idea first. Oh well — if we can't hope for innovation, hopefully at least Pentax will follow suit.