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Pentax smc A 20 mm f/2.8

Manufacturer Pentax
Model smc A 20 mm f/2.8
Lens style Wide angle
Focal length 20 mm
Maximum aperture f/2.8
Angle of view 94 o
Closest focusing distance 0.24 m
Maximum magnification
Minimum aperture 22
Number of diaphragm blades 0
Auto focus type MF
Lens Construction 10 elements / 9 groups
Filter diameter 67 mm
Macro No
Available mounts Pentax K
Dimensions 71 x 43 mm
Weight 245 g
Additional information
Average rating (1 owners reviews)
Build quality
Optical quality
Value for money


4.33 Good
Owners reviews (1)
  1. Arnold
    Arnold 19 February 2010, 15:47
    Build quality
    Optical quality
    Value for money


    IP 134.100.x.x
    Owner since: 5 years
    Price: 140 Euros
    User profile: Amateur

    Cons: at open aperture the corners lack a little bit of resolving power and contrast. With the original *ist D this problem was even more pronounced.

    Pros: Nice angle of view. On the K20D very good performance from f4.

    Summary: My standard wide-angle on the K20D

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