Pentax smc DA 14 mm 2.8 ED IF

Within its class the Pentax SMC-DA 14mm f/2.8 ED [IF] is a very good performer. The center resolution is very high throughout the tested aperture range whereas the border quality is good at f/2.8 and very good around f/8. High vignetting is the most pronounced weakness at f/2.8-f/4. Distortions are relatively well controlled but quite wavy thus somewhat more difficult to correct via imaging tools. CAs (color shadows at the borders) are relatively moderate. Typical for most wide angle lenses the bokeh (the quality of the out-of-focus blur) can be a bit harsh although this aspect actually is very decent for a lens within the ultra-wide scope. The build quality of the DA 14mm is excellent and both the AF speed and accuracy are very fine.