Correcting light leak or lens flare
Occasionally the worst happens and light gets into your camera. Fixing light leaks can be very time consuming to do and not all of them are possible. This is an example of a bad light leak, anything worse than this and your image may not be recoverable.
Read more on how this light leak photo was fixed on the blog. or take a course in fixing colour casts and fading in old photos to try yourself!