Whats Black? - AVS Forum | Home Theater Discussions And Reviews
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post #1 of 4 Old 06-24-2020, 10:11 PM - Thread Starter
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Whats Black?

White screen, non reflective space, and 16fl.

0.0001fl? 0.00001, 0.000001fl?
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post #2 of 4 Old 06-24-2020, 11:17 PM
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Quote:
Originally Posted by bdht View Post
White screen, non reflective space, and 16fl.

0.0001fl? 0.00001, 0.000001fl?
Sorry if this is a silly question but there to be a measurement for complete black but as a screen is white to begin with what you are getting it the measurement of a white screen with no light, so would the reading be difference in the same situation if the screen was indeed black.

In other words it's really telling you how dark your room is.

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post #3 of 4 Old 06-24-2020, 11:33 PM - Thread Starter
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Quote:
Originally Posted by Luminated67 View Post
Sorry if this is a silly question but there to be a measurement for complete black but as a screen is white to begin with what you are getting it the measurement of a white screen with no light, so would the reading be difference in the same situation if the screen was indeed black.

In other words it's really telling you how dark your room is.
Heh sorry I should elaborate I guess just curious around where the black floor of the projector would become indistinguishable to the masking. I would imagine around 0.0001fl gets hard to tell and 0.00001fl would look black.

I suppose the screen, peak white, etc. is irrelevant to the question but w.e
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post #4 of 4 Old 06-25-2020, 12:27 AM
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Human vision is ~90 photons per lumen second to go above the noise threshold. There's 1.12 * 10^16 photons per lumens second. So ~0.0000000000000080357143 ANSI lumens. Is that calculated right?
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