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<blockquote data-quote="WayneF" data-source="post: 387364" data-attributes="member: 12496">Manual is manual, the camera settings are always whatever you set them to be.&nbsp; Compensation does&nbsp; not change the manual that you set, but it does affect the light meter&nbsp; you see, so if you zero it manually to the meter, then it has effect.If Auto ISO is also on, compensation will adjust it to change the Manual&nbsp; exposure recorded (becomes auto exposure), but it cannot change the actual&nbsp; Manual settings.If in the other A,S,P automatic modes, of course compensation does change the settings of the camera to zero the meter.I'm not sure I follow all of your words, but yes, raising ISO means the camera shifts the sensor data higher (histogram is higher).&nbsp; And increasing Exposure in ACR means the computer shifts the data higher (histogram is higher),&nbsp; essentially the same thing (it is actually the Levels White Point that is&nbsp; shifted, pulling everything up).&nbsp; No real difference (camera is an analog gain, ACR is a digital shift, but both multiply data).&nbsp; Except if the camera ISO does it, you cannot shift it back so easily.&nbsp; ACR Raw can simply do it or not.Either one also pulls the noise level up.</blockquote>

[QUOTE="WayneF, post: 387364, member: 12496"] Manual is manual, the camera settings are always whatever you set them to be. Compensation does not change the manual that you set, but it does affect the light meter you see, so if you zero it manually to the meter, then it has effect. If Auto ISO is also on, compensation will adjust it to change the Manual exposure recorded (becomes auto exposure), but it cannot change the actual Manual settings. If in the other A,S,P automatic modes, of course compensation does change the settings of the camera to zero the meter. I'm not sure I follow all of your words, but yes, raising ISO means the camera shifts the sensor data higher (histogram is higher). And increasing Exposure in ACR means the computer shifts the data higher (histogram is higher), essentially the same thing (it is actually the Levels White Point that is shifted, pulling everything up). No real difference (camera is an analog gain, ACR is a digital shift, but both multiply data). Except if the camera ISO does it, you cannot shift it back so easily. ACR Raw can simply do it or not. Either one also pulls the noise level up. [/QUOTE]

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