Herramientas prácticas para trabajos de precisión
Calculadora de Tamaño de Pantalla para Cine al Aire Libre
Compare los ángulos de visión del público cercano y lejano con las dimensiones de pantalla, los límites de tamaño y el brillo ideal en oscuridad.
Brightness is the ideal screen-luminance calculation using delivered lumens. Outdoors, stray light and the lack of a dark enclosure can reduce perceived contrast much more than this number suggests.
How it works
How to use it: enter screen, audience-depth and measured or conservatively estimated delivered lumens. Edit near and far angle targets.
Formula. Viewing angle uses screen width and seat distance. Foot-lamberts = delivered lumens x gain / screen area in square feet.
Example. A 150-inch 16:9 screen is about 10.9 ft wide and 6.1 ft high.
Current-input example
The result above uses these exact values. This snapshot is included when the page is printed so the output can be checked against the original measurements.
- Screen diagonal
- 150 in
- Nearest seat
- 12 ft
- Farthest seat
- 25 ft
- Delivered lumens
- 3000
- Screen gain
- 1
- Minimum far-seat angle
- 30 deg
- Maximum near-seat angle
- 45 deg
Primary result: Screen size: 10.9 x 6.1 ft.
Before using the result
- Measure from the datum or reference edge described by this tool, and do not mix inside, outside and centerline dimensions.
- Keep inputs in the displayed units and preserve more precision than the final cutting or purchasing tolerance requires.
- When the result is close to a limit, verify it with a test piece, field measurement, manufacturer drawing or qualified project professional.
Limitations
This cannot determine wind safety, rigging, weather protection, electrical safety or local rules. Moonlight, street lights, screen material and projector calibration affect contrast. Secure outdoor screens to manufacturer specifications and never use unsafe improvised anchors.
Frequently asked questions
Can I project before sunset?
Usually with much weaker contrast. Projected black is only as dark as the illuminated screen, so waiting for darkness often matters more than adding modest projector output.
Herramientas relacionadas
Brillo del Proyector
Estime los pies-lambert a partir de los lúmenes entregados, el tamaño de pantalla y la ganancia, o calcule a la inversa la salida requerida.
Tamaño de Pantalla
Encuentre la imagen más grande que se ajuste a su distancia de lente, relación de tiro y altura útil de pared.
Autonomía del SAI
Estime la autonomía a partir de la capacidad total del banco de baterías y la carga medida del rack, comprobando tanto los vatios como los VA nominales del SAI.
Líneas de Visión
Estime la altura de cada grada necesaria para que la línea de visión libre la altura de cabeza asumida en la fila delantera.