Cita:
Originalmente publicado por DeepButi
"The iceberg image is a digital composite that I designed to illustrate the concept of "what you see is not necessarily what you get". As an underwater photographer I knew that my "vision" of what a big iceberg looks like was impossible to get in reality so I had to create it. The image exists in nature but due to water visibility is not possible to capture on film.
There are 4 separate images involved; the sky, the background, the top iceberg (shot in Antarctica), and the underwater iceberg (shot above water in Alaska and flipped in the final composite)." Ralph A. Clevenger
En claro. 4 fotos distintas: cielo, fondo, iceberg visible (fotografiado en la Antártida) e iceberg bajo el agua (fotografiado en Alaska).

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Pero tal como yo había imaginado, la parte inferior es una fotografía aerea volteada. Bajo el agua jamás tendrías suficiente profundidad de campo, ni la iluminación necesaria, ni tampoco la nitidez suficiente, como para realizarla.