Lens

Wide Angle
"A camera lens having a wider than normal angle of view (and usually a short focal length)"

Zoom
"a camera lens that magnifies the image"

Long Focus
"A lens in which the focal length is much greater than the diagonal of the film format (or standard lens)"

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Fish eye
"A fisheye lens is a wide-angle lens that takes in an extremely wide, hemispherical image"

Quasi Fish Eye
"A lens produces an image on the film that covers the entire frame"

Catadioptric
"A lens that uses reflected and refracting surfaces to form an image. More commonly known as a mirror lens."

Macro
"Macro lets you get very close to subjects but have very shallow depth of field."

Teleconverter
"A lens with a very narrow field of view."



Refrences:
Google, MiMi.hu