define scene luminance.
June 16, 2023
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I would like to see the same but with an exposure of 4 hours (or so).
BTW, the above is the same result as having no exposure (when simplified logic is applied).
So the statement: Scene luminance has nothing to do with exposure. is wrong at least in some cases!Have fun 😀 - or not 😩
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The [average] intensity of the light from the scene reaching the lens (average, since the exposure we are talking about is the average exposure).
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its not part of exposure , that is lighting the scene. nothing to do with taking the image nothing.
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define "average" scene luminosity ?
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You misunderstand the purpose of the Dumpster. Your comment here will likely end up there, if it starts an off-topic branch based on snide negativity, which detracts form the conversation. Danno and Don are generally discussing the matter at hand, even if the do go on at it harder and for longer than some people would prefer. It's only when their conversation has got to the point where there is no substantive matter being added that the end bit goes in the Dumpster.
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This is a case of the equivocation fallacy.
In photography, the word 'exposure' is used to mean two different things. The Google dictionary includes the two in one definition:
the action of exposing a photographic film to light.
"a camera which would give a picture immediately after exposure"
the quantity of light reaching a photographic film, as determined by shutter speed and lens aperture.
"an exposure of 0.5 seconds at f/5.6"
The latter definition is wrong, because it excludes scene luminance, but this isn't a technical directory. '0.5 seconds ad f/5.6' is an exposure value.
Anyhow, what you're doing is using the first definition - which clearly doesn't include scene luminance, and confusing it with the second, which should, had the Google dictionary got it right. -
That is priceless.
What is the sound of a low flying 747 overhead
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My thread title was
Scene luminance has nothing to do with exposure.
I didnt write "an exposure"
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That is wrong.
Please read Jim’s article, it includes the definition of exposure:
www.lensrentals.com/blog/2023/05/how-digital-cameras-determine-exposure-part-1/
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Iso/asa and scene lightness are both used to determining exposure. but it isnt "exposure"
would you say fill flash is scene lightness ?and part of determining exposure ? -
oh dear. I don't fancy your chances of winning this argument especially since you have a school kid wannabe troll agreeing with you 🤣😎 and you keep changing what you mean by "exposure". You and Porky need to get your stories straight before posting if you need to be taken seriously 😎
dprevived.com/t/for-fans-of-porky/3893/post/47725/
You have one very confused school kid supporting you 😃 but obviously he's not sure what exposure is himself 😀😎
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You wrote
The sense is clearly the same. 'Taking an exposure' can only mean an exposure, in the sense of a synonym for 'a photograph'.
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The scene doesn't have lightness - it has brightness. Lightness is a characteristic of a reproduced image, not a scene. You need to sort your concepts out.
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bright pink and light pink or just pink ?
