Fish Eye Lens:
A fish eye lens is an ultra wide-angle lens that produces a strong visual distortion intended to create either a wide panoramic or hemispherical image. Fisheye lenses achieve extremely wide angles of view.
Fisheye lenses are also used for scientific photography such as recording of aurora and meteors, and to study plan canopy geometry and to calculate near-ground solar radiation.
In a circular fish eye lens, the image circle in inscribed in the film or the sensor area; in a full frame fisheye lens the image circle is circumscribed around the lens or the sensor area.
The first types of fish eye lenses to be developed were “circular fish eye” – lenses which took in a 180-degree hemisphere and projected this as a circle within the film frame. Some circular fish eyes were available in orthographic projection models for scientific applications. These have a 180-degree vertical angle of view, and the horizontal and diagonal angle of view are also 180 degrees.
Fisheye lenses are also used for scientific photography such as recording of aurora and meteors, and to study plan canopy geometry and to calculate near-ground solar radiation.
In a circular fish eye lens, the image circle in inscribed in the film or the sensor area; in a full frame fisheye lens the image circle is circumscribed around the lens or the sensor area.
The first types of fish eye lenses to be developed were “circular fish eye” – lenses which took in a 180-degree hemisphere and projected this as a circle within the film frame. Some circular fish eyes were available in orthographic projection models for scientific applications. These have a 180-degree vertical angle of view, and the horizontal and diagonal angle of view are also 180 degrees.