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Derek Leffew

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About Derek Leffew

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    Gaffer
  1. Au contraire, mon cherie. coltemp/COLTEMP = (volts/VOLTS)^0.42 Running a lamp at 90% of rated voltage reduces color temp by ~5%. Running a lamp at 75% of rated voltage reduces color temp by ~11%. Running a lamp at 50% of rated voltage reduces color temp by ~25%. and so on.
  2. GAM Flickermaster: http://www.gamonline.com/catalog/flickermaster/index.php. Alternatively, if the load is less than 500W, wire a fluorescent starter in series with the incandescent lamp.
  3. I really don't think they'll catch on for film work, as they're hideously expensive, nearly as much as standard glass dichroic filters.
  4. 400A per leg, 120/208VAC 3Ø Wye-connected 4wire+ground should cover just about everything you could ever want to do in a space that size.
  5. Agree with the above. As long as the color/correction media is attached with clothespins to the side, and not the top and bottom, leaves of the barndoor you shouldn't have any problems with burn-through, although dark colors may fade after ten or more hours of constant use. HMI fixtures require no more safety precautions than incandescent fixtures. Explosions are extremely rare, and "harmful UV radiation" is removed by the glass lens.
  6. "Leko" is a trademark owned by Strand Lighting, and they currently offer no models with that name.SourceFour is a trademark of Electronic Theatre Controls, and although there have been many copies, none can compare to the original. Their only competitor is the Selecon Pacific series.
  7. By "Lighting Companies" what you appear to be compiling are Lighting Equipment Manufacturers. Here's a few theatrical manufacturers you may be missing: * Altman Lighting * American Grip * Applied Electronics * Apollo Design Technology * Barbizon Lighting Company * Brightline * Chauvet Lighting * Clay Paky * Coemar * Diversitronics * Electrol Engineering * Electronic Theatre Controls (ETC) * Entertainment Technology * Future Light * GAM Products * High End Systems * Interactive Technologies - * Johnson Systems * Lehigh Electric Products Company * Leprecon * Lighting & Electronic Design - * Lighting & Electronics * Lycian Stage Lighting * Lyntec * M.C. Lights * Martin Professional * Mole-Richardson * PixelRange * Pook Diemont & Ohl * Robert-Juliat * SECOA * Selecon * Selador * SSRC - Company Switch * Stagecraft Industries * Strand Lighting * Strong Entertainment Lighting * Syncrolite * Techni-Lux * Tempo Industries - * James Thomas Engineering * Texas Scenic Company * Times Square Lighting * Tomcat USA * Unipar Lighting Corp. USA * Union Connector * Vari-Lite * Wildfire * Wybron
  8. You're absolutely correct. I inadvertently proved that when taking pictures of a white 5600°K Xenon Super Trouper beam with my camera on the wrong setting. And the picture showed blue halation around the beam that I could not see. Only problem was I had to import from the camera to the laptop to see the issues. The camera's built-in LCD screen just doesn't have the clarity. See the pictures here. http://www.derekleffew.com/spotbaggy Thanks for all the help, Derek
  9. Thank you for your response. It helps me confirm I've been doing it right all along--the eye is the best "decider". I bought the Light Meter just to prove to myself that the sources were balanced to one another in intensity. Through experience I've learned that a 3250° incandescent source with 1/2 CTB and a Xenon Super Trouper (5600°) with 1/4 Minus Green and 1/2 CTO match pretty well. As you said, the camera, shader, switcher, and projector are all in the chain and each hurts or helps what I see on the big screen, or on my monitor (other than the projector). I wasn't intending on spending $1000 on a Color Temp Meter that I might use once a month anyway. If I happen to come across a used one for a good price, I'll consider it. Once again, thank you. Derek
  10. Can anyone recommend a cost-effective, hand held, color temperature meter for lighting for video? I posted in The LightNetwork and was told of the Minolta Colormeter III, but it has been discontinued. I've run followspot for many shows, including network-televised award shows and HBO specials, and the only time I know of a Color Temp Meter being used was on the first leg of Bette Midler's Kiss My Brass tour; they used House Fixtures and House Operators. On the second leg they used 2 Lycian 1290s on a truss over the mix position and brought their own operators for Bette, and 4 House Spots, but I don't know how/if they metered them as I only worked the load-in. Once I get the color temperature meter, how do I use it? Can anyone explain "mired shift" to me? Most of the corporate shows I do are heavy on Imag, and I have found that washing the stage with 750w Source4s with L202+R119; and 1/2 CTO + 1/4 Minus Green in the Super Trouper Followspots looks good on camera, depending on who's shading/op'ing the CCUs. To everyone, what's YOUR favorite Color Correction trick? Do you tape a flavor of Minus Green to the front of followspots? Thanks. . -------- visit my website at http://www.derekleffew.com
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