Guest Daniel J. Ashley-Smith Posted July 27, 2005 Share Posted July 27, 2005 (edited) One thing I've been wondering is how they attach the lights to the rig. I was thinking about building a lighting rig out of building scaffolding, purely because it's cheap, but, how could I attach the lights to it? What kind of "attachments" do these lights have? Thanks for any help, Dan. Edited July 27, 2005 by Daniel J. Ashley-Smith Link to comment Share on other sites More sharing options...
John Hall Posted July 27, 2005 Share Posted July 27, 2005 The Cardellini Clamp is designed for just such purposes. Just make sure to use a saftey cable as well, especially if the light is overhead on a grid. http://www.filmtools.com/cardellini.htm Link to comment Share on other sites More sharing options...
Premium Member David Mullen ASC Posted July 27, 2005 Premium Member Share Posted July 27, 2005 Lights are generally either hung on pipes with pipe clamps or Cartellini (or other clamps like C-Clamps) that have the appropriate spud (baby or junior, depending on the light.) Usually a safety chain is looped through in case the light falls off. Or they are mounted on stands, and the stands are securely rigged to the platform of the scaffold. Beware of nearby power lines. You don't have to touch them to create an arc between someone holding a metal object and a nearby line. Two people were killed on an "X-Files" set while on scaffold because there was an arc between a pipe (speed rail) one was carrying up the scaffold and a powerline over 10' away. Just two days ago, some Boy Scout leaders were killed setting up a tent under some power lines. There are a lot of safety rules regarding using lights on scaffold. Link to comment Share on other sites More sharing options...
timHealy Posted July 27, 2005 Share Posted July 27, 2005 (edited) when rigging to trusses and pipe there are an assortment of clamps that are used. The best ones are 2k and 1k pipe clamps. There are also chessborough type clamps that may be used. Some grips use aluminum speed rail for other smaller rigs, but they are not as strong as steel. You basically need to use the right material for what ever the job is and the weight of the lamp or rigs to be supported. In addition to cardellinis there are mafer and c clamps with channeled steel and a 1 or 2k stud or recepter. Stirrups are a terrific tool on a satge too. They are uses to rig froma truss or pipe that can be lowered no further. They hang like a pipe clamp and extend down into a set where a light with a pipe clamp can easily be added. In a big stage rig, with heavy lights, pipe clamps are the way to go. I would save the cardelinis and mafers for smallers units on smaller sets. But if you have scaffolding you may not want to rig to the scaffold itself. You could easily build a work deck out a window and use lights on stands as normal. It gives you flexibilty during the shoot. Just make sure you use safety rails and plenty of sandbags or even grip chain to screw lights down to the deck. Best Tim Edited July 27, 2005 by heel_e Link to comment Share on other sites More sharing options...
Premium Member Phil Rhodes Posted July 27, 2005 Premium Member Share Posted July 27, 2005 Hi, I don't think anyone who lacks the relevant experience should be doing this sort of work, anyway. About the most advanced I'll dare to get is a goalpost off a couple of wind-ups. Any more than that I'll get someone in to do it. And I don't think that anyone under the age of 18 should be doing it, ever. You won't get insurance. Phil Link to comment Share on other sites More sharing options...
Guest Daniel J. Ashley-Smith Posted July 27, 2005 Share Posted July 27, 2005 Ah right ok cheers guys. I'm not going to be using any proper trussing or rigging, because I've seen the price list for that stuff and I don't like it. Literally all I'm thinking of doing is using a hall, to build a small set made from plasterboard, building a scaffolding structure which will support itself on the ground, and rigging a few lights up. *Possibly* a perspects window with a green screen outside. (Although building the green screen is purely speculation. I'd love to do a green screen setup but I think building the window will be too hard) All of this is just thinking ahead. I don't think anyone who lacks the relevant experience should be doing this sort of work, anyway. About the most advanced I'll dare to get is a goal post off a couple of wind-ups. Any more than that I'll get someone in to do it. And I don't think that anyone under the age of 18 should be doing it, ever. You won't get insurance. <{POST_SNAPBACK}> Ahhh that's where trusty Dad comes in. Anyway I've been looking at the safety precautions for these things and I think I've got a good idea on how to keep the set safe. For a start it will most likely be my Dad building the scaffold structure and the set, he's good at DIY stuff. I'll just paint and decorate it... But I'll watch closely so the next time I do it, I'll be able to do it myself. Believe me I'm just as concerned about safety as every other film maker. I don't want to get sued for half a million, and plus I actually do give a damn about the safety of my cast and crew. Mainly I'm just learning about lighting right now. I'm not actually going to do anything of this scale for some time yet. I think I might ask my college if I can help out with the lighting they've got in there actually. They've got proper rigging and lights. Ok, they're not exactly film lights but it will give me a rough idea of how things are put together e.t.c. This time, I'll learn about the subject BEFORE going ahead and doing it. I tend to bulls**t my way into everything I do. The first project I ever did, "God Calling Rachel", I gave them crap about me doing loads of films before e.t.c. I was a P.A, and I still managed to screw that up! (I have to learn that with certain tea, you DON'T put milk in it..... then again was 15 at the time I think) Link to comment Share on other sites More sharing options...
Guest Daniel J. Ashley-Smith Posted July 27, 2005 Share Posted July 27, 2005 Just another quick question, about fresnels. As far as I know, the meaning of fresnel basically just means that there is a glass lens which magnifys the light? Not sure though. Link to comment Share on other sites More sharing options...
Premium Member David Mullen ASC Posted July 27, 2005 Premium Member Share Posted July 27, 2005 If some of us sound a little like we're banging the safety drum here, it's because we just went through our union's safety certification program last fall which included scaffold (parallels) safety for general crew and scaffold construction for grips. Link to comment Share on other sites More sharing options...
Premium Member drew_town Posted July 27, 2005 Premium Member Share Posted July 27, 2005 Just another quick question, about fresnels. As far as I know, the meaning of fresnel basically just means that there is a glass lens which magnifys the light? Not sure though. <{POST_SNAPBACK}> The lens focuses the light, not magnifying it. At least that's my understanding. Link to comment Share on other sites More sharing options...
Guest Daniel J. Ashley-Smith Posted July 27, 2005 Share Posted July 27, 2005 The lens focuses the light, not magnifying it. At least that's my understanding. <{POST_SNAPBACK}> I see, so more of a spot light as opposed to a dispersed fill light? Thanks. Link to comment Share on other sites More sharing options...
Premium Member Luke Prendergast Posted July 27, 2005 Premium Member Share Posted July 27, 2005 A fresnel lens is a pretty vicious way of shaping light, but it needs a lot less glass and is physically very robust. The glass-to-air angle of a lens is what determines focus, so cutting the profile up allows sharp angles without a fat curved front surface, while retaining the short focal length. Typically, theatrical fixtures are stepped on one side and flat on the other. Link to comment Share on other sites More sharing options...
Premium Member Phil Rhodes Posted July 27, 2005 Premium Member Share Posted July 27, 2005 Hi, Bear in mind if you put a window in a set, the last thing you actually want is anything in it. Just make a hole. Glass or perspex reflect things. None of the windows on the Star Trek sets had any glass in them unless there was a specific need for a reflection - just a starcloth hung outside. Phil Link to comment Share on other sites More sharing options...
Michael Morlan Posted August 2, 2005 Share Posted August 2, 2005 A great article on the history of the fresnel lens here: http://www.lanternroom.com/misc/freslens.htm Link to comment Share on other sites More sharing options...
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