Lens Types

WIDE ANGLE
24mm focal length or lower, fits more into the frame of the image (hence WIDE angle).

ZOOM
A lens that has the ability to change it's focal length (zoom in and out).

TELEPHOTO
Generally 70-300mm zoom, the telephoto lens magnifies the subject at the expense of the frame of vision and the depth of field.

RETRO FOCUS
Difficult to figure out... will revisit .

SUPPLEMENTARY LENS
A simple converging lens that screws on to the actual lens to allow closer focusing.

QUASI FISH-EYE
Extreme wide angle, captures image with all of image frame.

FISH-EYE
Extreme wide angle, captures image circularly within image frame

CATADIOPTRIC
Reflects light back and forth within lens to capture image.

MACRO
Allows very close range focal lengths.

TELECONVERTER
Secondary lens used to increase focal distance of primary lens.

ASPHERICAL LENS

PC LENS / TILT SHIFT LENS
Changes the plane of focus and the perspective.