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					Night vision hidden camera
Hidden Camera manufacturers love low lux ratings, but consumers may be left in the dark. You’ve seen the claims:
“Night vision” or “Outstanding reproduction in low light conditions.” Night vision Hidden Cameras with low-lux
ratings are the norm, and manufacturers seem intent on seeing just how low they can go. Claims of 2 lux, 1 lux, 0.75
lux and even 0.1 Lux are not uncommon.


What do these ratings really mean? What is a lux, and just how many do you need?


Simply stated, the lux is the metric unit for measuring the amount of light that falls on an object, and is the European
equivalent of the British foot-candle (or lumen). Specifically, 1 lux equals the amount of light that falls on a one-
square-meter surface that is one meter away from a single candle. 10 lux equals the amount of light produced by 10
candles one meter away. A hidden camera with a 1-lux rating claims to be able to produce an image by the light of one
candle that is about three feet away from the subject. Many cameras on the market today can do just that. The
problem is that the resulting image may be of very poor quality. When a manufacturer slaps a 1-lux rating on the side
of its camera, it is giving a subjective opinion of what is an acceptable image. While the ratings are more uniform,
objective and scientific than they have been in the past, what a given manufacturer considers “acceptable” is probably
not up to the standards of the quality-conscious video grapher. A grainy, monochrome form is probably not what you
had in mind when you purchased your night vision “low light” hidden camera. Also, since “acceptable image” is a
subjective term, lux ratings will vary from one manufacturer to another. Brand X’s 2-lux camera may produce a
noticeably better image than a competitor’s camera also rated at 2 lux. There’s no way to know without testing them
both.


This is changing. The Electronic Industries Association (EIA) has created a new standard (EIA-639) that has wide
industry support. This should remove the subjectivity from lux ratings and indeed many companies are already using
the new EIA-639 standard. We are crossing our fingers that they will also start writing “EIA-639 Lux rating” on their
boxes so we’ll know what to look for. Espymall.com has been manufacturing hidden cameras and surveillance
cameras for years in Los Angeles, California, They offer night vision hidden cameras with only 0.1 Lux, which produce
very sharp image when there is only moon lights. As most crimes and special situations happened during the night,
it’s vital to purchase a night vision hidden camera and monitor and record everything possible

				
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posted:3/20/2011
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Description: all about cameras