I have a question for RX1 owners. Do you know what external flash units besides the Sony one for over $500 will work on the RX1? How does the wireless flash work? I see nothing in the user guide or user manual on how to use it. Is it compatible with certain wireless flashes? So you need a wireless trigger device in the hot shoe to make it work? I'm not sure what selecting that option under the flash setting does. Does anyone know? I tired using an old standard none TTL flash unit I had and it would not trigger it. Every other camera I have had worked with it. It just has the center connector.
I do not have a RX-1, but do have a A99 with the new ISO type hot-shoe which looks identical. I have no idea if they are actually the same, but would strongly suspect they are ... except for the front pins under the lip to enable the external EVF which the A99 doesn't require.
The A99 works with radio senders, so I do not know why the RX-1 would not. If not it is a crime since this is a leaf-shutter with higher flash sync ... at least 1/500th with most radio transmitters, and even higher sync with new radios like the Profoto AIR transmitter.
With a radio transmitter in the hot-shoe, I did have to learn to turn off the view-finder effect in the menu in order to see anything when shooting in manual mode with strobes ... other-wise the viewfinder is dark/or black in a darkened studio with a fast shutter speed and stopped down lens.
The new 60 flash automatically turns off the viewfinder effect: when in the hot shoe and turned on.
The Sony wireless isn't a radio, it is IR ... so limited to line-of-sight and shorter distances. I haven't tried the new 60 flash with the older 58 flashes using the wire-less mode yet.
To my knowledge, Sony doesn't make a separate IR transmitter like the Canon STE-2.
Since this ISO hot-shoe is new, it'll be awhile before pass-through TTL radio transmitters are available ... I'll be on the look-out for the Phottix version to work with my other Phottix Stratos-II receivers.
The 60 speed-light flash for the Sony A99 is way to big for the RX-1 ... it remains to be seen if they produce the smaller speed-light with ISO shoe like they did previously with the Sony/Minolta shoe.
-Marc
P/S. does the RX-1 have a PC outlet? I can't see one in the photos of the camera.