Differences

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--- raw_based_exposure_feedback [2021/02/04 03:46] – create page with copy/paste from forum Audionut
+++ raw_based_exposure_feedback [2021/02/04 04:18] – [Spotmeter] links Audionut
@@ Line 1: / Line 1: @@
+;#;
+**Magic Lantern RAW based exposure feedback**
+;#;
 Magic Lantern contains a number of exposure feedback features, based from raw data.  This is very beneficial, as regular Canon exposure feedback is subject to picture style, and other JPG based processing.
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+{{ https://s1.postimg.cc/6ggsz6boun/Global_draw.png?200|}}
+These features can be found in the Overlay menu. See image ->
-These features can be found in the Overlay menu.
-[img width=300]https://s1.postimg.cc/6ggsz6boun/Global_draw.png[/img]
-They work in both Movie mode and Photo mode Live View, and in the Quick Image review.
+They work in both [[/glossary/#Movie mode]] and Photo mode [[/glossary/#Live View]], and in the [[/glossary/#Quick Image review]].
 In Movie mode Live View, you must load one of the raw recording modules and have it activated for raw based exposure feedback to function.
 In Photo mode (Live View or not), picture quality must be set to raw in Canon menu, and in Photo mode Live View, ExpSim must be enabled.
-[iurl=#Spotmeter][b]Spotmeter[/b][/iurl]
+  * [[#Spotmeter]]
-[iurl=#Histogram][b]Histogram[/b][/iurl]
+  * [[#Histogram]]
-[iurl=#Histobar][b]Simplified Histobar[/b][/iurl]
+  * [[#Histobar]]
-[iurl=#Zebras][b]Zebras[/b][/iurl]
+  * [[#Zebras]]
-[iurl=#dualzebras][b]Dual ISO Zebras[/b][/iurl]
+  * [[#Dual Zebras]]
-[iurl=#JPG][b]RAW vs JPG[/b][/iurl]
+  * [[#RAW vs JPG]]
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-[anchor=Spotmeter][color=green][size=14pt][u][b]Spotmeter[/b][/u][/size][/color][/anchor]
-[img width=300]https://s1.postimg.cc/7jgia29vlr/Spotmeter.png[/img]
+==== Spotmeter ====
-The spotmeter is a tool used to meter a particular area of the scene.  For instance, you may want to meter a particular area of your scene, as a highlight, a midtone, or whatever.  The raw based spotmeter in ML works in EV ([url=http://en.wikipedia.org/wiki/Exposure_value]Exposure Value[/url]) units, and represents the EV from saturation (overexposure).
+{{ https://s1.postimg.cc/7jgia29vlr/Spotmeter.png?200}}
-Here is a teddy bear, showing the midtone patch metered for a midtone, checking the white level at this metering, and then Exposing to the Right.
+The spotmeter is a tool used to meter a particular area of the scene.  For instance, you may want to meter a particular area of your scene, as a highlight, a midtone, or whatever.  The raw based spotmeter in ML works in EV [[wp>Exposure_value|Exposure Value]] units, and represents the EV from saturation [[/glossary/#overexposure|(overexposure)]].
-[img width=300]https://s1.postimg.cc/77emw8deq7/Spot_Midtone.jpg[/img] [img width=300]https://s1.postimg.cc/8l1609lw5r/Spot_Highlight.jpg[/img] [img width=300]https://s1.postimg.cc/32j1k4ilj3/Spot_ETTR.jpg[/img]
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+Below is a teddy bear, showing the midtone patch metered for a midtone, checking the white level at this metering, and then after [[/glossary/#ettr|Exposing to the Right]].
-[anchor=Histogram][color=green][size=14pt][u][b]Histogram[/b][/u][/size][/color][/anchor]
+{{ https://s1.postimg.cc/32j1k4ilj3/Spot_ETTR.jpg?200}} {{https://s1.postimg.cc/77emw8deq7/Spot_Midtone.jpg?200 }} {{ https://s1.postimg.cc/8l1609lw5r/Spot_Highlight.jpg?200  }}
-[img width=300]https://s1.postimg.cc/59xhqkpsa7/Histogram.png[/img]
-The histogram provides a graphical representation of the exposure of the entire scene.
-[img width=400]https://s1.postimg.cc/60vbnmdcwf/Histogram.jpg[/img]
+==== Histogram ====
+{{ https://s1.postimg.cc/59xhqkpsa7/Histogram.png?200}}
+The histogram provides a graphical representation of the exposure of the entire scene.
+{{ https://s1.postimg.cc/60vbnmdcwf/Histogram.jpg?200}}
 The colors in the histogram, represent the color channel in the camera (Red, Green, Blue).
@@ Line 46: / Line 53: @@
 The white vertical lines at the rear of the histogram display, represent full stop EV.  So the very right hand side of the histogram represents overexposure.  The first line from the right hand side, represents 1 EV (a full stop) from overexposure, the next line is another 1 EV (2 EV total) from overexposure, and so on.
-[img width=300]http://upload.wikimedia.org/wikipedia/commons/3/3b/CIE1931xy_blank.svg[/img]
+{{ http://upload.wikimedia.org/wikipedia/commons/3/3b/CIE1931xy_blank.svg?200}}
 When the scene contains overexposure, the histogram will provide warnings.
-[img width=400]https://s1.postimg.cc/1e9omxht9r/Histo_Over.jpg[/img]
+{{ https://s1.postimg.cc/1e9omxht9r/Histo_Over.jpg?200}}
-The colored circles in the histogram, warn of overexposure in the color channel.  Small circles show a very small amount of exposure, with the circles increasing in size.  When at least 1 % of the pixels of a channel are overexposed, the numbers inside these colored circles, describe the percentage of pixels that have been overexposed in that color channel.  In the above example. 1% of red pixels have been overexposed, 10% of green pixels and 2% of Blue pixels.
+The colored circles in the histogram, warn of overexposure in the color channel
+((This information is derived from the downsized Live View stream.  So the percentages reported, may not be an //extremely// accurate representation of the actual percentage, but provides useful information nonetheless.)).  Small circles show a very small amount of exposure, with the circles increasing in size.  When at least 1 % of the pixels of a channel are overexposed, the numbers inside these colored circles, describe the percentage of pixels that have been overexposed in that color channel.  In the above example. 1% of red pixels have been overexposed, 10% of green pixels and 2% of Blue pixels.
-[color=red]Note:[/color]  This information is derived from the downsized Live View stream.  So the percentages reported, may not be an [i]extremely[/i] accurate representation of the actual percentage, but provides useful information nonetheless.
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