Pentax Takumar-F Zoom 70-210mm f/4-5.6 User Manual

Details the internal design of the lens, comprising 13 elements arranged in 9 groups.

Specifies the angular field of vision, ranging from 34.5 degrees to 11.8 degrees.

Indicates that the diaphragm mechanism is fully automatic.

States the smallest aperture values the lens can achieve, from f/32 to f/45.

Defines the closest distance at which the lens can focus, at 3.6 feet (1.1 meters).

Indicates the highest magnification ratio the lens can achieve, which is 0.25X.

Provides the physical dimensions of the lens: 2.5 x 3.5 inches (71 x 98.5mm).

Specifies the weight of the lens as 19.4 ounces (555 grams).

Indicates the filter thread size required for the lens, which is 49mm.

Describes the type of lens hood compatible with this lens: 49mm screw-in type (RH-RB).

Specifies the model number for the lens case: S80-160.