Sigma fp L camera reveal next week

Started 10 months ago | Discussions thread
xpatUSA
xpatUSA Forum Pro • Posts: 20,381
Re: Sigma fp L camera reveal next week

User5625933977 wrote:

I don’t know, but does Sigma know?

Will it be the fp-L or actually an fp-Y?

Luminance (L)

From Wikipedia, the free encyclopedia

Luminance is a photometric measure of the luminous intensity per unit area of light travelling in a given direction. It describes the amount of light that passes through, is emitted from, or is reflected from a particular area, and falls within a given solid angle.

Luminance is often used to characterize emission or reflection from flat, diffuse surfaces. Luminance levels indicate how much luminous power could be detected by the human eye looking at a particular surface from a particular angle of view. Luminance is thus an indicator of how bright the surface will appear. In this case, the solid angle of interest is the solid angle subtended by the eye's pupil.

Luma (video) (Y)

From Wikipedia, the free encyclopedia

In video, luma represents the brightness in an image (the "black-and-white" or achromatic portion of the image). Luma is typically paired with chrominance. Luma represents the achromatic image, while the chroma components represent the color information. Converting R′G′B′sources (such as the output of a three-CCD camera) into luma and chroma allows for chroma subsampling: because human vision has finer spatial sensitivity to luminance ("black and white") differences than chromatic differences...

Luma (Y) is sometimes erroneously called Luminance (L).

Excellent, and let's not forget Y', the brightness part of JPEGs ...

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