Lens Construction: (Master Lens) 6 elements in 4 groups

(Life-Size Converter) 3 elements in 3 groups

Angle of View: 48'

Diaphragm: Fully Automatic

Photometric Method: TTL open-aperture metering

Minimum Shooting Distance: (Master Lens) 0.443m (1.45 ft.)

(Life-Size Converter) 0.314m (1.05 ft.)

Maximum Magnification: (Master Lens) 0.52x

(Life-Size Converter) 1.12x

Filter Diameter: 77mm

Maximum Diameter & Length: 92.5mm x 77.5mm (3.6" x 3.1")

Weight: 600g (21.2 oz.)

Catalog No.: 29840 PENTAX SMC 67 MACRO 100MM F/4