Upload & Sell: Off
okay, the kids are in bed and now I can play. First, here is a general overview of the set-up
The hardware cost $6.16 at the hardware store and includes
1 - 3/16"X3' steel rod
1pkg - screw eye (approx 5/16")
8 light bulbs
Stuff around the house -
2x4 pieces to insert the screw eyes
5/16" stop collar
old sync cord
some hand clamps to temporary construction
Okay, as you can see from the picture the two screw eyes are guides for the steel rod. This provides the bulb smashing action. The stop collar will set the distance and also provide an electrical connection to fire the flash. You'll need to strip an old sync cord or buy one cheap on ebay and strip the end you wont connect to the flash. Strip the insulation off each of the two leads and expose the bare copper wires. The flash will fire by simply making the two wires touch. Here is the quick way I made the flash fire.
I used electrical tape to insulate the screw eye so that when I connected the alligator clip the flash didn't fire. By insulating the screw eye the electrical connection is made when the stop collar hits the top of the alligator clip and then the flash goes off.
After the set-up is constructed here is how I got the shot. I placed the lightbulb in the box lined with a garbage bag and made the steel rod touch the light bulb. Now set the stop collar approximately 1/4" to 1" above the screw eye. If you think about it, the distant of the stop collar above the alligator clip is the time delay till the flash fires. I found that 1/4" was too fast and about 1/2" was good for getting the picture like I posted. I used a 70-200mm at 200mm at f4 for 4 seconds with timer mode. I also used manual focus. The external flash was about 1.5 feet away from the bulb and set to manual at 1/128th power. The sync cord was attached to this flash and the other end is on the stop collar and alligator clip. I hit the shutter on the camera, waited for the shutter to open, and then within the 4 second shuttertime quicky pushed the rod down until it broke the bulb and the stop collar contacted the alligator clip which fired the flash. And presto you've seen the result. The big variables were getting the bulb to stay in place and the larger the end of the steel rod the better shatter effect from the bulb. I actually taped a large bolt to the end of the steel rod to have a larger surface area to smash the bulb. This is a fun variable to play with.
I wrote this up quickly, but I hope it makes sense. If not send me a message and I'll try and explain in more detail.