Select projector from list below or enter technical data
Projector
If projector was not found in list above, the necessary data can be found in its technical documentation:
Projector ratio
Projector contrast:
:1 (to one)
Projector luminous flux, lumen:
Specify the type of data available, and enter values (other values will be calculated):
Focal length f range from
to
;
chip size
Zoom ratio range (ratio of projection
distance D to image size W) from
to
Enter projection screen data:
Enter the number
and select its type:
AV Stumpfl mobile screens
AV Stumpfl installation screens
If you use another screen, unselect the checkbox above and enter the value of screen gain from technical documentation:
Estimate the ambient light level
The light level can be measured by different units, the most popular of which is a "lux". Illumination goes greater when the light source is brighter and decreases with the illuminated area grouth. You can measure the light with any device or estimate it using next samples:
- light from a candle from 30 cm distance gives the illumination of 10,764 lux
- a quarter of the moon - 0.01 lux
- a full moon on a clear night - 0.27 lux
- the street with a few lights at night - 3.4 lux
- living room in an apartment building - 50 lux
- an office with bright illumination - 320-500 lux
- a cloudy day or a television studio - 1000 lux
- a sunny day with indirect lighting - 10000-25000 lux.
Ambient light level, lux
Calculated data
Screen diagonal, inch
?
Screen width, cm
?
Screen height, cm
?
Screen area, m2
?
The distance between projector and screen can be in range from
?
to
?
m
Real brightness, lux
?
The intensity of light reflected from the illuminated surface called luminosity. The British unit of luminosity - ft-L. The default value for cinema projection is 14-16 ft-L, so if you use the projector for watching movies at home is considered to be the ideal range of values 10-18 ft-L. Second common units for luminosity is a candle per square meter (cd/m2).
So, luminosity of screen is, cd/m2
?
or ft-L
?
Visible image contrast
?