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A fisheye lens is an ultra wide-angle lens that produces strong visual distortion intended to create a wide panoramic or hemispherical image. [4][5]: 145 Fisheye lenses achieve extremely wide angles of view, well beyond any rectilinear lens. Instead of producing images with straight lines of perspective (rectilinear images), fisheye lenses use ...
An oscar, Astronotus ocellatus, surveys its environment. Vision is an important sensory system for most species of fish.Fish eyes are similar to the eyes of terrestrial vertebrates like birds and mammals, but have a more spherical lens.
Fisheye lenses, typical focal lengths are between 8 mm and 10 mm for circular images, and 15–16 mm for full-frame images. Up to 180° and beyond. Up to 180° and beyond. A circular fisheye lens (as opposed to a full-frame fisheye) is an example of a lens where the angle of coverage is less than the angle of view.
Lobotes surinamensis, Rio Grande do Sul, Brazil Tel Aviv, Israel. The Atlantic tripletail (Lobotes surinamensis), also known as the black grunt, black perch, buoy fish, buoyfish, brown triple tail, brown tripletail, conchy leaf, dusky triple-tail, dusky tripletail, flasher, sleepfish, triple tail, triple-tail, tripletail, or tripple tail is a species of marine ray-finned fish belonging to the ...
External anatomy of a bony fish (Hector's lanternfish): 1. operculum (gill cover), 2. lateral line, 3. dorsal fin, 4. adipose fin, 5. caudal peduncle, 6. caudal fin, 7. anal fin, 8. photophores, 9. pelvic fins (paired), 10. pectoral fins (paired) Internal anatomy of a bony fish. Fish anatomy is the study of the form or morphology of fish. It ...
J. E. Böhlke & J. E. Randall, 1963. The blackcap basslet (Gramma melacara), or blackcap gramma, is a species of fish inhabiting reefs in the tropical western Atlantic Ocean. It prefers vertical surfaces with crevices in which it can hide. It can be found at depths from 10 to 180 metres (33 to 591 ft) (usually between 20 and 60 metres (66 and ...
These fish are named because of their barrel-shaped, tubular eyes, which are generally directed upwards to detect the silhouettes of available prey; however, the fish are capable of directing their eyes forward, as well. The family name Opisthoproctidae is derived from the Greek words opisthe 'behind' and proktos ' anus '.
Leuciscus lapacinus Stefani, Serra, Loffredo & Fossa, 1987. The common chub (Squalius cephalus), also known as the European chub or simply chub, [2][1] is a species of European freshwater ray-finned fish in the carp family Cyprinidae, that frequents both slow and moderate rivers, as well as canals, lakes and still waterbodies of various kinds.