Each of several items in a list, preceded by a bullet symbol for emphasis. For easy access to this data, refer to the "BulletPoints" tag in XML or JSON.
:
- - Black
- - Maximum aperture number: 22
- - Closest focusing distance: 0.2 m
Long product name Pentax smc DA 21mm f/3.2 AL Limited Black
:
smc DA 21mm f/3.2 AL Limited
The long product name of Pentax smc DA 21mm f/3.2 AL Limited Black. For easy access to this data, refer to the "ProductDescription" block and the "ShortDesc" tag in XML or the "Description" block and the "LongProductName" tag in JSON.
smc DA 21mm f/3.2 AL Limited
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Short summary description Pentax smc DA 21mm f/3.2 AL Limited Black:
This short summary of the Pentax smc DA 21mm f/3.2 AL Limited Black data-sheet is auto-generated and uses the product title and the first six key specs.
Pentax smc DA 21mm f/3.2 AL Limited, 0.2 m, 68°, Black, 6.3 cm, 4.9 cm, 25 mm
Long summary description Pentax smc DA 21mm f/3.2 AL Limited Black:
This is an auto-generated long summary of Pentax smc DA 21mm f/3.2 AL Limited Black based on the first three specs of the first five spec groups.
Pentax smc DA 21mm f/3.2 AL Limited. Closest focusing distance: 0.2 m, Lens viewing angle, diagonal: 68°. Product colour: Black. Diameter: 6.3 cm, Filter size: 4.9 cm, Length: 25 mm. Magnification: 0.17x
While significantly cheaper than the original FA Limited lenses, the main drawback to the DA lenses is their price when compared to prime lenses from other manufacturers. For example, the Pentax 40/2.8 has a street price of $270. A Canon 35/2 is a stop... 
small, physically light and solid housing at the same time, splendid image quality in the frame centre, very fast and accurate autofocus... 
significant distortion for such an angle of view, noticeable coma, very high astigmatism, image quality on the edge of the frame near the maximum relative aperture could have been better, a bit too high vignetting. 