Double exposure

In photography Multiple exposures refer to a single image made up of multiple images. Double exposure has a corresponding meaning in respect of two images made into one. The exposure values of the images do not have to be the same. In the analogue world a multiple exposure is a technique as to where the shutter of a camera is opened more than once to expose the film multiple times usually to different images. On a camera this technique is achieved by bracketing and shooting the images 1 stop under exposed. 

Here are some examples:

Here is how I made my images digitally: 

First of all i opened both images that i wanted to merge.

Then I dragged the top image over onto the bottom image.

Then i turned down the opacity on the top image so i could see the bottom image through it. 

Then I used the free transform tool to stretch the top image until it fit over the bottom image. 

Then I changed the opacity until I was happy with the image.

This was my final result:

Double exposures are something I use quite a lot, i like the effect. I think double exposures work well because they give an image a whole new meaning of depth. I think planned double exposures work a lot better, even though you sometimes get lucky with the mistakes!