Pentax smc FA 31mm F1.8 AL Limited

Wideangle prime lens | Pentax KAF
Principal specifications
Lens type Prime lens
Max Format size 35mm FF
Focal length 31 mm
Image stabilisation No
Lens mount Pentax KAF
Aperture
Maximum aperture F1.8
Minimum aperture F22.0
Aperture ring Yes
Number of diaphragm blades 9
Optics
Elements 9
Groups 7
Focus
Minimum focus 0.30 m (11.81)
Maximum magnification 0.16×
Autofocus Yes
Motor type Screw drive from camera
Full time manual Unknown
Focus method Extending front
DoF scale Yes
Physical
Weight 345 g (0.76 lb)
Diameter 65 mm (2.56)
Length 69 mm (2.7)
Colour Black or silver
Filter thread 58 mm
Hood supplied Yes
Hood product code built-in flower-shaped hood
Tripod collar No
Other
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