May 2014 Photo Tips: Using a Fisheye Lens
A fish-eye lens is an ultra-wide angle lens (short focal length) that produces strong visual barrel distortion intended to produce a hemispherical image or a wide panorama. They use special mapping to achieve these extremely wide angles of view but give you a characteristic convex non-rectilinear appearance to your image. Typical focal lengths for full- frame sensors would be 15-16 mm (I shoot with a Nikon 16 mm on a FX sensor – D800 or 4 – not a DX ie. digital sensor). The name was introduced in 1906 by Robert W. Wood when he imagined how a fish would see objects from beneath the water. It was used primarily for meteorology or whole sky- sphere pictures initially. There are 2 groups of fish-eye lenses: Circular Fish-eye (180 degrees in every direction) – not as common and Diagonal Fish-eye (covers the whole picture frame but only 180 degrees on the diagonal field of view), but again lots depend on your sensor type (digital DX or full format FX). In general, however, there are only two middle straight lines – one horizontal and one vertical with zero distortion. Depth of Field (DOF) is almost limitless. Most of the time even at F/5.6-8 with focus on the nearest or the chosen object, the DOF will almost be to infinity.
But with that out of the way, let’s have some fun.
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