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Party Lighting with Multiple Speedlites

When you're photographing a birthday party or holiday gift opening, how many times have your guests cursed you for blinding them with your on camera flash? If your flash is pointed forward, you're blinding your subject and getting nasty, harsh shadows on everything. If you're bouncing your on-camera flash off a ceiling or wall, you inevitably blind another guest while you're straining to get a better angle while forgetting where your flash is pointed. Either way, you'll quickly become a rather unpopular participant at family gatherings.

Fortunately, there is a better way to light a room such that you get more attractive lighting without annoying all the other guests.

I've recently become addicted to the Strobist movement started by David Hobby, which teaches camera lighting techniques using off-camera Speedlights. Strobists typically set their flash power manually rather than relying on TTL or other new-fangled systems that require sophisticated means of communication between the camera body and flashes.

My standard "party lighting" is pretty simple, and can be duplicated with just two off-camera flashes. Basically, I bounce two flashes off the ceiling from opposite directions so that no matter where the subject is located, at least one of the lights will be hitting them. Because both lights are bouncing of the ceiling, nobody gets blinded and all the lighting is nice and soft.

In an average sized, somewhat squarish room, the strobes should be located in opposite corners. If the room is very elongated, you might need a third strobe located near the middle of one wall to help light the center of the room. In that case, the two corner flashes should be located at opposite ends of the same long wall, while the third flash is located near the middle of the opposite long wall.

The flashes should be sitting at a height roughly equal to the height of the room's tallest occupant so as to avoid blinding that person while standing. In my family, that's a little over 6' (185cm). If your ceiling is taller than 10' (3 meters), you probably want to locate the flashes as high as possible to save battery power and reduce your recycle times. In my experience, positioning them 3' (1 meter) from the ceiling works well.

The flashes should be angled to point toward the ceiling about one quarter to one third of the way across the room. Zoom the flash head to its widest setting, if possible. This will light up as much of the ceiling as possible, creating a beautiful, soft light over everything in the room (except the ceiling, which will be blown-out white if it sneaks into your shots).

Of course, this flash position will still blind anybody who looks toward the flashes, which is why you need to shield the bottom and sides of each flash so that a standing person can't see the flash's lens. I have some squares of 2mm-thick, black foam from a craft store that wrap half way around the flash head. I secure them with large rubber bands, making half a snoot. The flash's burst is blocked from hitting people, but still lights up most of the ceiling and, frequently, the wall right behind the flash.

With new, electronic flashes, you can use Nikon's CLS or Canon's eTTL system to control flash power as necessary. If you're on a budget and are using manual-only radio triggers, you can spend a few minutes before the party dialing in your flash power, knowing that it won't change throughout the event as long as the other room lights don't change. I typically set my flashes (a Vivitar 283 and a beefy Sunpak Auto 544) at about 1/4 or sometimes 1/2 power. This gets me sub-two-second recycle times on full batteries.

Now, when you take a photo with only the flash transmitter on your camera's hot shoe, the entire ceiling will light up to evenly illuminate your subject and the background. Most people don't even notice light coming from that direction. Because there's no flash on your camera, nobody squints when you point your lens at their face.

Color Temperature

Most family and dining rooms contain either tungsten (incandescent) or fluorescent lights for normal usage. If you light the room with a bare flash (5000K), tungsten lights and anything lit primarily by them will appear very yellow or orange. Fluorescent lights will give things a greenish tint. Anything lit primarily by your flashes, however, will appear normal.

You can correct this by gelling your flashes to match the room lights, and then setting your camera's white balance to match. That done, the room lights will appear somewhat dim, but still whitish, and all of the room lights and flashes will match.

A "gel" is a little sheet of colored plastic that's placed over the flash to apply a color cast to everything it lights. A CTO gel ("color temperature orange") will make your flash the same color as a tungsten bulb. Similar gels will match fluorescent or other colors of lighting. You can get a pack of Speedlight-sized gels (the Rosco Strobist pack) from B&H for about $10.

Remember that if the ceiling off which you're bouncing isn't white, then it will have the same effect as adding a gel of that color. Bouncing a flash off a red ceiling will make every shot look like you're in a darkroom. Bouncing off bare, pine paneling is similar to applying a half CTO (about 4000K) gel.

Fill Flash

The one problem with this great overhead light becomes apparent when you're down low and pointing the camera up into the face of a child who's playing or opening a gift. Because all the lighting is coming from above, the subject's face will be mostly in shadow.

The solution that I've found is to use an on-camera flash to fill in those shadows. This is possible if you're using CLS/eTTL, or if your camera body has a PC sync jack through which to trigger the remote trasmitter. I typically set the on-camera flash to about 2 stops below the "ideal" power (whatever the camera determines that to be for each shot). This fills in the shadows and gives definition to the dark areas while still allowing the ceiling to provide the soft, primary lighting for the shot. Just remember to gel the on-camera flash the same as your off-camera flashes.

The down side of this is that you now have a direct flash (albeit a weak one) hitting your subjects in the face, which may make them react with the old, familiar squint when they see you coming. It all depends on how accustomed your subjects are to flashes and how frequently you expect to be shooting from a low vantage point.

I've gotta run now, but I'll insert photos and other external links shortly.

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last updated 11 Jan 2011
Obi-Wan (obiwan@jedi.com)

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