Although it is not exactly correct to equate lumens with brightness we can generally say that an image projected through an outdoor projector with a high lumen count will be brighter than a projector with fewer lumens. The American National Standards Institute (ANSI) takes care of all that for us and breaks it down into a measurement called lumens, which in simple terms is the measurement of the intensity of light emitted from a projector. Got it? Neither do we, and fortunately we don't need to know. In these days of precise scientific calibrations, one candela can now be defined as the luminous intensity of monochromatic radiation emitted by a predefined source at a frequency of 540THz with a radiant intensity of 0.001464128 W/sr.
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Of course, it is no longer necessary to know the luminous intensity of whale blubber to pull off a successful outdoor movie event. Easy enough, so long as you can manage to find whale blubber candles. One candela was the intensity of light radiating from a single candle made out of precisely 0.167 troy pounds of whale blubber of a consistency thick enough to burn at a specific rate for exactly eight hours. In short, a lumen is a measurement of the intensity of light radiation projected by a light source.īack in the old days they called it candlepower, and measurements were taken in what were called candelas. If you have ever shopped around for a digital projector, you have most likely come across the term lumen more than once.
Angle your screen so that the projection surface is shielded from ambient lighting. What's the Best Outdoor Projection Solution? To pull off the perfect outdoor movie event, you will want your outdoor projection surface to appear black, not gray! Moonlight, streetlights, headlights, houselights, campfire light, a late sunset, or even bright starlight can all affect your image.Īny kind of light will bounce off the projection surface back into your eyes, lightening the appearance of your outdoor movie screen. Outdoor environments often include a number of variables that can negatively effect your outdoor projector's ability to project a high quality image. The difference you see is referred to as an improved contrast ratio. Suddenly the projected image quality has vastly improved. When the lights are turned off, and the screen is no longer reflecting ambient light, the projection image reveals deeper blacks. The blackest black you can see is actually that gray color. Notice at that very moment the darkest portion of the projector's image never looks any darker than the light gray color of your projection surface.
This is because projection surface is actually bouncing the light in the room back into your eyes, making the movie screen, and the image on it, appear much lighter than when the lights have been dimmed.ĭepending on the color temperature of the lights in the theater, the screen will reflects light-gray or an orangish pinkish color. But you can barely see the advertisements projected onto the screen. You can see just enough so that you can get to your seat without tripping and spilling your over-sized drink. Here's why: imagine sitting in a dimly lit theater. You will need a brighter projector for outdoor projection! If a projector works well on a screen in a dark environment indoors, you cannot expect it will work as well on the same sized screen outdoors. Ambient Light/Contrast Ratios for Outdoor Projection This page discusses ambient lighting effecting contrast ratios, lumens, maintenance, and many more features related to outdoor projectors and outdoor projection. This tutorial brings together the collective wisdom and experience of our most talented outdoor projectionists and technicians to assist you in selecting the right outdoor projector and guide you through the process of using your projector for outdoor movie events.
Outdoor projection conditions create a set of obstacles for your outdoor projector vs. Welcome to Open Air Cinema's tutorial on outdoor projection. Outdoor Projectors and Outdoor Projection
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