What is Minimum Luminance ? at DVinfo.net

Mark Fan · September 18th, 2004, 10:18 PM

I always read about this term, but what does it actually indicate ? is it measured in Lux or Lx ??
for instance , Sony PD170 has a ML of 1XL , and panasonic DVC30 has 4LUX, what's the dufference ??

Andre De Clercq · September 19th, 2004, 04:57 AM

Low light performance (minimum illumination) for videocams is expressed in Lux (same as Lx). It defines the amount of light (illumination) which is needed to output a 50% videosignal when a 90% reflective testcard is being shoot. S/N is not involved and makes the subjective acceptability of the (noisy) 50% signal difficult. Better compare cams...
FYI Luminance is different from illumination and stands in video for the B&W part of the signal and in optics for the light generated by a given surface. In display technology it's often called "lightness"

September 18th, 2004, 10:18 PM	#1
Mark Fan Regular Crew Join Date: Aug 2004 Posts: 33	What is Minimum Luminance ? I always read about this term, but what does it actually indicate ? is it measured in Lux or Lx ?? for instance , Sony PD170 has a ML of 1XL , and panasonic DVC30 has 4LUX, what's the dufference ??

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September 19th, 2004, 04:57 AM	#2
Andre De Clercq Major Player Join Date: Sep 2002 Location: Belgium Posts: 804	Low light performance (minimum illumination) for videocams is expressed in Lux (same as Lx). It defines the amount of light (illumination) which is needed to output a 50% videosignal when a 90% reflective testcard is being shoot. S/N is not involved and makes the subjective acceptability of the (noisy) 50% signal difficult. Better compare cams... FYI Luminance is different from illumination and stands in video for the B&W part of the signal and in optics for the light generated by a given surface. In display technology it's often called "lightness"