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Active D lighting - on or off.
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Sep 23, 2022 15:23:07   #
selmslie Loc: Fernandina Beach, FL, USA
 
rmalarz wrote:
Scotty,
The only issue I have with your statement is that it's apparent that you do not understand the intricacies of ETTR/EBTR. That is, even though you claim to know all there is to know about this technique.
--Bob

What intricacies? There aren't any!

And if you understood raw files you would know that there is no such thing as EBTR. It's a myth, a figment of someone's imagination. Try Googling it.

All you need to do is to get the brightest part of the image as close to the raw limit as possible without blowing one of the raw channels. See ETTR does not mean you need to increase the exposure. The resulting JPEG SOOC might look lighter, darker or close to normal depending on the scene's dynamic range.

You can get the brightest part of the image to record the target raw values several different ways - using Zebra warnings (Sony, Apple and several other cameras), spot metering and placing the bright stuff two or three stops above middle gray (your approach), watching for blinkies in the result (nearly all cameras), using Highlight Weighted Metering and in broad daylight, Sunny 16.

The rest of the work has to do with developing the captured data to produce the image you want.

You have never explained how UniWB fits into this process because it doesn't.

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Sep 23, 2022 16:33:24   #
joecichjr Loc: Chicago S. Suburbs, Illinois, USA
 
Ysarex wrote:
It's settings dependent. That's why I originally said: "It can (setting dependent) affect your raw file by altering exposure." Then in the post you quote I said: "It can affect raw files by reducing exposure." And that includes with a Z7. ADL may or may not affect exposure depending on the camera settings. Below is an example (two SOOC JPEGS) using a Z7 where ADL did alter the exposure.

Camera set to matrix metering and aperture priority so that the camera's metering system selects the shutter speed. First photo ADL is off and the camera selected 1/3 sec. shutter speed. Second photo ADL set to Extra High and the camera selected 1/6 sec. shutter speed.

I have no use for ADL so I'm not too interested in trying to map out all the different ways (settings combinations) in which yes it will or no it won't alter the exposure. So I just say heads up ADL can affect raw file exposure (settings dependent).
It's settings dependent. That's why I originally s... (show quote)


A beautiful transformation šŸ§ā­šŸ§ā­šŸ§

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Sep 23, 2022 16:46:23   #
rmalarz Loc: Tempe, Arizona
 
Regardless of your opinions, ETTR/EBTR works very well for me.
--Bob
selmslie wrote:
What intricacies? There aren't any!

And if you understood raw files you would know that there is no such thing as EBTR. It's a myth, a figment of someone's imagination. Try Googling it.

All you need to do is to get the brightest part of the image as close to the raw limit as possible without blowing one of the raw channels. See ETTR does not mean you need to increase the exposure. The resulting JPEG SOOC might look lighter, darker or close to normal depending on the scene's dynamic range.

You can get the brightest part of the image to record the target raw values several different ways - using Zebra warnings (Sony, Apple and several other cameras), spot metering and placing the bright stuff two or three stops above middle gray (your approach), watching for blinkies in the result (nearly all cameras), using Highlight Weighted Metering and in broad daylight, Sunny 16.

The rest of the work has to do with developing the captured data to produce the image you want.

You have never explained how UniWB fits into this process because it doesn't.
What intricacies? b There aren't any! /b br ... (show quote)

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Sep 23, 2022 17:18:25   #
selmslie Loc: Fernandina Beach, FL, USA
 
rmalarz wrote:
Regardless of your opinions, ETTR/EBTR works very well for me.
--Bob

You may think it works but I'm not convinced.

You need to document your approach with accompanying RawDigger evidence like I have.

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Sep 23, 2022 17:42:09   #
rmalarz Loc: Tempe, Arizona
 
I know it works. As Robert Mapplethorpe stated, look at the pictures. My photographs are proof enough. I don't need to waste my time playing silly prove it to me games.
--Bob
selmslie wrote:
You may think it works but I'm not convinced.

You need to document your approach with accompanying RawDigger evidence like I have.

Reply
Sep 23, 2022 17:46:29   #
mwsilvers Loc: Central New Jersey
 
User ID wrote:
De Debble made me do it ....


That seems like the most likely reason.

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Sep 23, 2022 17:58:54   #
selmslie Loc: Fernandina Beach, FL, USA
 
rmalarz wrote:
I know it works. As Robert Mapplethorpe stated, look at the pictures. My photographs are proof enough. I don't need to waste my time playing silly prove it to me games.
--Bob

You actually don't know how it works or you would not be fooling with UniWB and altered SOOC JPEGs.

I will open a fresh thread in the next day or two and explain it once more.

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Sep 23, 2022 23:15:57   #
TonyP Loc: New Zealand
 
rmalarz wrote:
I know it works. As Robert Mapplethorpe stated, look at the pictures. My photographs are proof enough. I don't need to waste my time playing silly prove it to me games.
--Bob



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Sep 24, 2022 04:47:11   #
User ID
 
selmslie wrote:
You actually don't know how it works or you would not be fooling with UniWB and altered SOOC JPEGs.

I will open a fresh thread in the next day or two and explain it once more.

Or why not just rerun the earlier threads .....

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Sep 24, 2022 06:55:05   #
selmslie Loc: Fernandina Beach, FL, USA
 
User ID wrote:
Or why not just rerun the earlier threads .....

I don't have a problem with Bob's results. They are fine. They speak for themselves.

But anyone can get the same results without using ETTR so long as they don't blow the highlights. That's what I will show.

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Sep 24, 2022 09:11:30   #
Robertl594 Loc: Bloomfield Hills, Michigan and Nantucket
 
Personally, Iā€™d shoot RAW and make your adjustments in post.

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Sep 24, 2022 11:25:17   #
selmslie Loc: Fernandina Beach, FL, USA
 
selmslie wrote:
You actually don't know how it works or you would not be fooling with UniWB and altered SOOC JPEGs.

I will open a fresh thread in the next day or two and explain it once more.

See What does ETTR accomplish?

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Sep 24, 2022 14:09:54   #
Robertl594 Loc: Bloomfield Hills, Michigan and Nantucket
 
selmslie wrote:

ETTR: there are 256 tonal values in 8 bit images. Can be easily understood in your histogram. Histogram is a chart that shows you how many pixels are in each tonal value. Left side is 0, or no light, black, and the right side is 255, or white. To the right of white is blown out over exposed, no information, usually BAD.

Use your histogram to adjust your exposure either using shutter speed, aperture or exposure compensation. Shift to the right without bumping up against the right end, as it is much better to darken an image, than lighten an image. Lightening brings out the noise, whereas darkening hides it.
Hope this is helpful.
RL

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Sep 24, 2022 14:39:51   #
selmslie Loc: Fernandina Beach, FL, USA
 
Robertl594 wrote:
ETTR: there are 256 tonal values in 8 bit images. Can be easily understood in your histogram. Histogram is a chart that shows you how many pixels are in each tonal value. Left side is 0, or no light, black, and the right side is 255, or white. To the right of white is blown out over exposed, no information, usually BAD.

Use your histogram to adjust your exposure either using shutter speed, aperture or exposure compensation. Shift to the right without bumping up against the right end, as it is much better to darken an image, than lighten an image. Lightening brings out the noise, whereas darkening hides it.
Hope this is helpful.
RL
ETTR: there are 256 tonal values in 8 bit images. ... (show quote)

I was not asking a question.

That's a link to a thread about whether ETTR actually provides any useful benefits. Try clicking on it.

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Sep 24, 2022 21:38:35   #
fantom Loc: Colorado
 
Ysarex wrote:
Just checked my Z7 which is set to save raw only. Active D lighting is available at all levels. Maybe the difference is old/new cameras.


That would be my opinion also.

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