Photo ethics are a set of unwritten rules that professional photographers like to follow, it typically applies to landscape photographers. This set of rules is designed to reduce the effect of false advertisement within media. Many photographers use Photoshop to combine multiple photos into one that may seem unrealistic. These rules help to stop this from being seen as the original by showing the editing method or using disclaimers so amateur photographers do not see it as the original photo.
This example shows how photos can be enhanced to be better than the original image. (left – unedited, right – edited)
Ethan's Photography Portfolio 