Winning Images with Any Underwater Camera by Colley Paul

Author:Colley, Paul
Language: eng
Format: epub
Tags: underwater photography, underwater photographic techniques, scuba photography, technical photography, underwater camera guide
Publisher: Dived Up Publications
Published: 2014-05-27T04:00:00+00:00

Square format

Square formats (1 x 1) are worth a special mention. It is a difficult format to work with, but it does work well with radial subjects, so there are at least three applications underwater: cropping to a square frame for a circular fisheye image; cropping to centre a Snell’s window image (or the area that can be captured, which is often less than the full circle); and spin shots, which usually have circular blur around a central subject. But any macro subject that merits a pure bulls-eye (dead centre, symmetrical) composition, such as the secretary blenny at Figure 36 (on page 82), could probably benefit from a square format frame. By the way, it is a myth that increasing your depth allows you to capture more of Snell’s window. All you will do with increasing depth is increase the physical area of Snell’s window that you can look through. Whatever your depth, Snell’s window will be about a 100-degree cone. So the only thing that affects your capture of the window edge is the field of view provided by the lens and dome port, your viewpoint (ideally looking vertically upwards) and the format of the sensor, for which 4 x 3 is closer-to-square and so has an advantage over 3 x 2. The best format for a symmetrical view through Snell’s window would of course be square (1 x 1) or circular.

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