[exasperaited]

FWIW, the venerable Yongnuo RF-602 flash triggers can do this well with the right camera cord connected to the receiver; I think it may even do half-press AF.

I kept a set around with cables for my Nikon D700 and D7000.

[alanbernstein]

Thanks, will look into it. For some reason I thought all the RF options were super expensive, maybe not.