1. Welcome to Mu-43.com—a friendly Micro 4/3 camera & photography discussion forum!

    If you are thinking of buying a camera or need help with your photos, you will find our forum members full of advice! Click here to join for free!

What's the knob on the front of the EM-1

Discussion in 'Olympus Cameras' started by hwan, Oct 18, 2014.

  1. hwan

    hwan Mu-43 Regular

    Sep 20, 2014
    St Louis, MO
    There's that little plastic thing with a flash symbol on it that can be removed. What is that for?

    Attached Files:

  2. It's an external flash connector, instructions on its use are on page 132 of the manual. I've never used it so don't know how it works!
  3. SpecFoto

    SpecFoto Mu-43 Top Veteran Subscribing Member

    Aug 28, 2012
    So Cal
    It's called a PC flash synchronization port. It is used for hard wiring connections to flash heads. In my case I use a PC Buff ring flash setup where the EM1 camera fits inside the circular diameter of the ring flash and there isn't room to mount a connection off the standard hot shoe, (or any wireless transmitters) so this is where I plug the ring flash into the camera.
  4. hwan

    hwan Mu-43 Regular

    Sep 20, 2014
    St Louis, MO
    Interesting. Thanks all.
  5. Ross the fiddler

    Ross the fiddler Mu-43 Hall of Famer

    The PC connection was frequently used for studio flashes before wireless or slave triggering made it more convenient.
  6. RamblinR

    RamblinR Mu-43 Top Veteran Subscribing Member

    Aug 16, 2012
    Qld Australia
    The little button cover screws into place.
    Be sure to check it now and then as I lost mine even though I never use it.
    Maybe putting it in and out of a bag has slowly turned it.
    Ordered a new one from Olympus
  7. beameup

    beameup Mu-43 Regular

    Oct 23, 2013
    These are "old school" connectors. I just bought a plug off ebay for a dollar and put the "original" plug in a box with the hot-shoe cover and other unused accessories, for safe-keeping.
  8. Mikefellh

    Mikefellh Mu-43 Top Veteran

    Jun 7, 2012
    Toronto, Canada
    Actually if you want to be correct, Prontor-Compur connections were the PRIMARY way to connect a flash before hotshoes existed. I've owned a few cameras that had this limitation like:
    Subscribe to see EXIF info for this image (if available)

    You can see the PC connector right of the lens; you'd put the flash into the accessory shoe (which was the same size and shape of today's hotshoe, but no electrical contacts), and run a cable from the flash to the PC connector. Here's another example, the PC connector is on the left side of the lens where it says "125"...BTW the lever above the word "COMPUR" is to cock the shutter before every shot, and the lever inbetween is aperture control:
    Subscribe to see EXIF info for this image (if available)
    • Like Like x 1
  1. This site uses cookies to help personalise content, tailor your experience and to keep you logged in if you register.
    By continuing to use this site, you are consenting to our use of cookies.