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Lighting speakers next to screen - Equipment Advice
In several courses I teach students make presentations standing next
to a projection screen (computer projector). I'd like to get a record of the presentations in which both what they're projecting and the students are visible. It seems to me this ought to be possible by having the students stand next to the screen and lighting them with a luminaire that has a cutoff so that they're illuminated, but not the screen. From my reading the device for this kind of control is called a "barn door". We'll be recording several days of presentation at a time using a digital camcorder. My questions: 1) Does anyone have experience doing this kind of work, and if so, does what I propose make sense? 2) Do you have recommendations for the kind of lights and barn door (or other device) I should purchase. I don't have a signficant budget for this so price matters. Thanks Jim Mitchell |
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Lighting speakers next to screen - Equipment Advice
On 27 Jan 2007 13:42:21 -0800, "AEngineerDU"
wrote: In several courses I teach students make presentations standing next to a projection screen (computer projector). I'd like to get a record of the presentations in which both what they're projecting and the students are visible. It seems to me this ought to be possible by having the students stand next to the screen and lighting them with a luminaire that has a cutoff so that they're illuminated, but not the screen. From my reading the device for this kind of control is called a "barn door". We'll be recording several days of presentation at a time using a digital camcorder. My questions: 1) Does anyone have experience doing this kind of work, and if so, does what I propose make sense? 2) Do you have recommendations for the kind of lights and barn door (or other device) I should purchase. I don't have a signficant budget for this so price matters. Thanks Jim Mitchell Any rental places around Any pro photographers that would were you could rent some equipment? that way you'd get some good advice and the use of better equipment than you could afford to purchase. |
#3
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Lighting speakers next to screen - Equipment Advice
On Jan 27, 4:42 pm, "AEngineerDU" wrote: In several courses I teach students make presentations standing next to a projection screen (computer projector). I'd like to get a record of the presentations in which both what they're projecting and the students are visible. It seems to me this ought to be possible by having the students stand next to the screen and lighting them with a luminaire that has a cutoff so that they're illuminated, but not the screen. From my reading the device for this kind of control is called a "barn door". We'll be recording several days of presentation at a time using a digital camcorder. My questions: 1) Does anyone have experience doing this kind of work, and if so, does what I propose make sense? 2) Do you have recommendations for the kind of lights and barn door (or other device) I should purchase. I don't have a signficant budget for this so price matters. Thanks Jim Mitchell Jim, The traditional way of doing this is with a spot light on the lecturne. Barn doors are used with broad beamed light, they are nothing more than a shade that blocks the light. Some auditoriums have spots on either side of the screen, some unfortunately only have a bank of lights in front, short of having some bulbs taken out there is not much to do with that type of room layout. You could put a spot light on a stand and light the lecturne that way, but to look right it needs to be high up, and 15-20 foot stands are expensive, not to mention the price of a good spot light. The other thing a light of that sort does is inhibit the speaker, especially if they move around the stage. Digital projectors tend to be bright so take a light reading on one presentation, we average, not whte of black backgrounds and a light reading around the lecturne, your hand is a good object to use, see how they fall you might be surprised. Another good thing is that digital camcorders tend to have good light sensitivity. Good luck Tom |
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