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Pentax smc DA 21 mm f/3.2 AL Limited

Manufacturer Pentax
Model smc DA 21 mm f/3.2 AL Limited
Lens style Wide angle
Focal length 21 mm
Maximum aperture f/3.2
Angle of view 68 o
Closest focusing distance 0.2 m
Maximum magnification 1:5.88
Minimum aperture 22
Number of diaphragm blades 7
Auto focus type AF
Lens Construction 8 elements / 5 groups
Filter diameter 43 mm
Macro No
Available mounts Pentax K
Dimensions 63 x 25 mm
Weight 140 g
Additional information can be used with 43mm and 49mm filters
Average rating (2 owners reviews)
Build quality
Optical quality
Value for money


4.00 Good
Owners reviews (2)
  1. heribert
    heribert 3 November 2013, 01:42
    Build quality
    Optical quality
    Value for money


    IP 91.0.x.x
    Owner since: 3 years
    User profile: Semipro

    Cons: pillow distortion

    Pros: it is so small nice Hood sharp rather nice bokeh

    Summary: wonderful for streetphotography

  2. Michael Shea
    Michael Shea 13 October 2013, 11:16
    Build quality
    Optical quality
    Value for money


    IP 85.139.x.x
    Owner since: 1 year
    Price: £380
    User profile: Amateur

    Cons: Relatively slow for a prime lens. Sharpness from corner to corner only obtained by stopping down to at least f5.6 and preferably f8. Expensive. In all honesty, optically no improvement on discontinued 16-45mm f4 lens, which in the UK at least is/was less than half its price.

    Pros: Extremely well made. Easy to handle and its diminutive size enables you to comfortably pack and carry two or three other Pentax primes in a small carrying case. Fairly reliable and fast autofocus. Tolerably sharp when stopped down, although Pentax RAW settings will often require some adjustment. Versatile focal length. Neutral colour rendering.

    Summary: Despite what Pentax forums would have you believe, there is nothing special about this lens, except for its compact size and excellent, robust build quality. Unless size is a critical factor you are probably going to better served by a decent zoom lens. A vast improvement on the Pentax K-5 kit lens of course, but that's not saying much.

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