What does the Levels Histogram tell us about the photo?
Well … the black arrow to the left hand side is well away from the “mountain range” telling us that the photo contains no (or very little) pure blacks. Similarly, the white arrow on the far right tells us there is no (or very little) pure whites in the photo. We already know this because the white areas of the photo as we perceived the original to be (i.e. the clouds and window frames) have the pink cast to them. Also notice in the bottom right hand corner of the pop-up Levels window there are three “eye-dropper” buttons, one filled with black, one with grey and one with white. These can be used to “sample” your photo and pick out where it is perceived the original black, grey and white areas of the photo are. These eye-droppers are what we will use in the basic correction of the photo. Which one to use I hear you ask? Well it depends on the photo. I tend to favour using the grey eye-dropper first since I can usually evaluate a photo and find a mid grey part to sample from. If your p
