One of the most difficult forms of photography is underwater photography that requires specially designed equipment and the advanced knowledge of some tricky techniques.
To get a perfect shot, you need to have a correct exposure, accurate focus, pleasing color balance, controlled movement of your subject, and a light adjustment because you have to deal with low light. One cool creative version of underwater photography is over-under photography technique where half of the frame (the top half) is above water and the other half allows photographer to take a peek below water’s surface. It also known as split-shot photography.
For a good over-under, you need to take these photos with very wide fisheye lens, in a large dome port, using a small aperture for good depth of field.
Beautiful Below Water’s Surface Photos
These are some of the best examples of over-under photos, created by professional photographers that allows you to take a glimpse of what’s there below water surface.

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Thank you for the information was, very beneficial
Beautiful split-shot photos.
this site was great by helping me with a presentation!!