Most Micro Four Thirds cameras (other than the Olympus OM-D E-M1) do not have a PC sync port to connect an off-camera flash in manual flash exposure mode.
Why do this?
Whilst you can use a radio flash transmitter system to achieve this without cords, there are several main downsides:
- potential issues with the radio triggering – particularly in areas where radio waves don’t transmit well or when there are others using the same radio channels
- transmitter and receivers cost more and are a little bulky attached to the flash units
- cannot push shutter speed above flash x-sync well due to the radio triggering latency
Solution is cheap and easy:
There are several types of hotshoe adapters which provide a PC sync port:
- hotshoes with full TTL pass through capability to a top mounted hotshoe
- these are ideal if you wish to also mount your Micro Four Thirds compatible flash and use it as you normally would
- I have bought and used the Flash IS-HC120 hot shoe adapter for Canon EOS (pin compatible with Micro Four Thirds and Four Thirds flash systems), and it works very well and appears to be well made – NB see post script at bottom – mine has stopped functioning!
- hotshoes with only a single pin pass through capability to the top mounted hotshoe
- these are ideal if you wish to mount your Micro Four Thirds flash and use it in manual mode while pushing shutter speed above x-sync
- these are getting hard to find!
- radio transmitter unit with PC sync port
- also can function as a radio transmitter but usually do not have TTL pass-through compatibility for Micro Four Thirds
- but even when not used as a radio transmitter may give latency preventing use in allowing faster shutter speeds above x-sync
- NB. PocketWizard TTL Canon units do not seem to be able to fire mounted Olympus flash units even in “pass-through” mode, and the Mini-TTL does NOT have a PC sync port
More on flash units for Micro Four Thirds and Four Thirds – here.
P.S. I purchased one of the iShoot adapters but unfortunately the PC sync connection appears to be very temperamental and thus I have had to stop using it – it may only be an issue with the one that I received and not a general issue with them but I have decided to resort back to my non-TTL multi-PC sync hotshoe adapter, even though the PC sync ports are not threaded.