
Atlanta, US
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I've done a good bit of ADL testing with other Nikon cameras. The best choice depends a bit on how you handle your images during post processing.
ADL combines an exposure adjustment to protect highlights with a complex curve to recover shadows and balance the resulting exposure. ADL Low has no exposure adjustment. There are adjustments of -0.3, -0.7 and -1.0 for ADL Normal, High, and Extra High.
I found the curve that is being applied is very difficult to reproduce with post processing. It's not a single slider adjustment - it is more complicated and I was unable to reproduce the effect in 15 minutes of testing. It is beyond D-Lighting since it does more to protect lighter areas.
If you were to shoot JPEG images, ADL is probably a better choice when you want to maintain shadow detail - such as with macro, landscape, and middle of the day outside photos. But if you want the strong shadows - as with some portrait images, you would not want ADL.
The concern with ADL is actually are underexposing the image, and the Nikon 1 cameras do not do well with strong shadow recovery. So I would probably avoid the highest levels of ADL with the Nikon 1 even though I might use them with images from other cameras.
If you use Nikon View, Capture, or Photo Mechanic, the camera settings are honored and displayed in the RAW image. During post processing in Capture, you can adjust the curve applied in ADL by changing the setting to Off, Low, Normal, High, or Extra High. There is no exposure adjustment during post processing - just the curve. And you cannot activate ADL in post processing if it was turned Off in the camera.
If you post process your images in Lightroom, Photoshop, or another program that does not use the camera settings, the ADL curve is ignored and all you have is the exposure adjustment. So unless you have it set on ADL Low, the image would simply be underexposed.
My typical setting is ADL Low. That applies the curve but does not adjust exposure, so there is no harm to the image. It preserves the opportunity to adjust the ADL setting in post processing. On a bright day with harsh light, I have used ADL High and it was successful, but that is a choice for a specific situation. ADL Auto is a bit of a black box - the camera makes the choice based on the scene and that might be okay, but I prefer more control.
I would not use ADL if I processed in Lightroom, but you could use ADL Low for the same exposure and to maintain the opportunity for future post processing in Capture.
If you shoot JPEG's, I would set ADL as appropriate to the scene.
One thing to be aware of is that the image you see on the LCD is a basic in-camera JPEG, so regardless of the product you use for post processing, this image is the thumbnail and is used for the histogram, blinkies, etc. It would reflect your ADL setting.
Eric Bowles Nikonians Team My Gallery Workshops
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