My image in HDR Efex Pro 2 does not match the exposure I set in the merge dialogue window. Why is that?
The exposure preview slider in the merge dialogue window does not change the exposure of the image. It is meant to be used as a tool to check your ghost reduction. For example, if there is ghosting in a dark area of the image, you can brighten the image to better see if the Ghost Reduction has been applied to that area. Please refer to our interactive help system to better learn how to use the exposure slider.