bein gin a market where I provide security and surveillance cameras (as one of many related product lines)I was comparing stats and came up with a daunting question, one which i will aso ask manufacturers and post any info of interest to anyone here.
LUX is a statistic used to illustrate the light sensitivity of a given lens. A commomn LUX reference is as follows: 0.00005 lux = Starlight, 0.25 lux = Full moon on a clear night, 50-Lux = family living room etc. Each to show teh low light capabilities of a particular lens.
Okay so LUX is defined but then I thought, who decides what a clear image is at certain light levels? A 0.25 lux camera could be barely showing outlines of an image, where another manufacyturer’s image may state 0.25 LUX but offer a crystal clear image where you can determine facial features.
according to Wikipedia, it is very loosely defined as the level at where an ‘acceptable image” can be seen. Acceptable by whom?
Seeign a figure at all, may be acceptable to some people. Havign clear facial definition would probably be preferred.
So here again we have another scenario of an inconsistent, or undefined stats used ot sell product, just like Frequency range is used ot sell speakers.
With speakers, everyone claims they handle 20Hz to 20kHz. the perfect human ears hearing range, however most high end manufacturer;s offer very definitive frequency ranges and graphs, whereas a cheapo speaker will ALWAYS state 20-20. Take for example MaCIntosh, a very high end speaker manufacturer. Thier stats may state, 55Hz to 20 kHz +/-3db. Meaning that the soundwave only varies in volume by + or – 3db across that frequency range. A competitors speaker, of much lower quality, may say 20hZ to 20kHz but it is +/- 12db. Meaning that sounds near the edge of that frequency range may be so quiet as to not be hear or so loud as to distort, a VERY big difference but according to useless specs, the cheap speaker appears better.
So what’s with Lux? Is it a relevant stat or just another number used competitively due to poor definition?
