(1) Lens Mount
Positive locking (PL) 54 mm stainless steel lens mount with Lens Data System (LDS) contacts.
(2) Close Focus
Close focus is measured from the film/sensor plane.
(3) Magnification Ratio
Magnification Ratio is the relationship of the size of an object on the film/sensor plane (first number) to the size of that object in real life (second number) at the close focus setting; horizontal (H) and vertical (V).
(4) Length
Length is measured from the lens mount to the front of the lens housing.
(5) Length (including flange focal distance)
Length is measured from the image to the front of the lens housing.
(6) Front Diameter
Diameter of the lens/matte box interface.