Exposure Compensation in Pro Mode

41Pixels

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May 13, 2014
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I thought that you could change the exposure compensation in Pro mode. Mine wont let me change it at all. Any idea how to make it changeable? It just changes by itself as it is now.. sometimes redded out.
 

SpookDroid

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Jul 14, 2011
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It will only be enabled if the Exposure time is set to AUTO. If you set that to anything manually, the compensation slider is disabled.
 

Mooncatt

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Feb 23, 2011
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Exposure compensation often serves two purposes in phones. I don't have the S9, so I'm just giving my best educated guess.

In Pro (aka manual) mode, you are likely able to either manually set the ISO and shutter settings or let the camera do it. Exposure compensation only compensates the camera's proper exposure algorithm when letting it set ISO and shutter speed itself. Normally, the camera tries to expose to a neutral brightness. Adjusting the exposure compensation in this "semi-auto" mode tells the camera to over or under expose the image.

When you go into full manual, the camera is not making any of the exposure decisions, thus there is nothing to compensate for. YOU are the exposure compensation, so to speak, by adjusting the ISO and shutter yourself. Since the exposure compensation serves no purpose in full manual, it becomes an exposure meter. It tells you if you are over, under, or correctly exposed based on your settings. This acts as a guide to help you judge your settings before you take the shot.

To test this, open your app in Pro mode and see what the exposure compensation/meter button reads. Then adjust your shutter speed up and down. As you move to a faster speed, you'll see the exposure meter move to a lower/negative number and the live preview will darken accordingly as it becomes more under exposed. Vice versa if you slow down the shutter speed, and your ISO affects this as well. Moving between bright and dark scenes will also cause the meter to fluctuate if you don't adjust the ISO and shutter speeds accordingly.
 

pjniez

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May 5, 2010
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It will only be enabled if the Exposure time is set to AUTO. If you set that to anything manually, the compensation slider is disabled.
THANKS!

I've been wondering why I've been unable to change the exposure compensation on my S9+ for a while now. I must have put it in manual at some point and forgot about it.

I'm somewhat surprised that that setting wasn't put back to auto like many other settings are when you exit the camera. But I guess that's ok since it is Pro mode and I'd probably be frustrated if there camera did reset that setting!

Thanks again!
 

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