 Jack Sweet |
Shooting in convention halls, trade shows, etc. Occasionally I need to photograph inside convention centers during trade show events. I get general crowd-type shots, press conference material and the like. The problem arises when I'm on the trade show floor proper--results there are spotty. I typically use a Canon A1 in full auto mode, a 28-85MM zoom and the on-camera Speedlite. I'll usually use 400 ASA film in those cases. It seems that, when the exposure is metered correctly, everything is green and when everything looks good color-wise the photo is under-exposed. I've tried using my F1 and this corrects for exposure but things are often still green. I hear this is because of fluorescent lighting and/or the kleig lights with which these venues are lit. Are there correcting filters available? Anyone have any tips for shooting trade shows? Thanks in advance.
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Jack Sweet |
Should have read farther down the questions: "If your camera is film-based, the yellowing you described is probably due to your not matching the film with the lighting for which it was designed. Thanks to Bob Cammarata
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John A. Lind |
If it's lit with fluorescent lights, the blue 80-A filter and tungsten film described won't work . . . they are good only for high powered tungsten (incandescent or halogen) lights . . . and that's only if you turn off the speedlight (the flash is daylight balanced at about 5500K-5600K). I'm not certain what you mean by "Klieg lights." These were very high power carbon arc type "hot lights" used by the motion picture studios . . . named after John H. Klieg who created them. The name is often used to describe large, powerful spotlights and searchlights (the kind used outdoors at "grand openings"). I presume you must mean spot lights of some type (perhaps large ones) which could be mercury vapor or incandescent and both of those are different types of light also. If the lighting levels are that high that you're obviously ending up with mixed lighting in the prints, in spite of using a flash, try backing off some on the film speed to something like Portra 160. This will increase how much of the illumination is from your flash and how much is from the ambient lighting. Do so with some caution though. If you have a wide range of distance captured by the photograph, the more distant portions will end up darker because you are using more light from the speedlight on your camera. -- John
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Jack Sweet |
Thanks, John. You're right--I improperly used "Kleig" lights as a generic term. I've actually e-mailed the Las Vegas Convention & Visitors Bureau and asked them specifically what kind of lighting is used in the exhibit halls. I don't have problems shooting in meeting rooms and the like. The problem is on the exhibit hall floors themselves. I'm usually shooting atmosphere stuff at fairly close range (10-15 feet), along with vehicles on display. I'll post back with the convention center's answer when I get it. I'm pretty sure I'm doing something wrong somewhere along the line.
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Jack Sweet |
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