Pentax SMC DA 18-250mm f/3.5-6.3 ED AL [IF] - Review / Lab Test Report
31 October 2008
Conclusion: The Pentax SMC DA 18-250mm f/3.5-6.3 ED AL [IF] is a worthy representative of its species. Naturally it is not comparable to more specialized zoom lenses, not to mention fix-focals, but within its scope it does a good job. This is especially true for the range below 100mm where its resolution can match many conventional zoom lenses. At 18mm the vignetting and distortion figures are fairly extreme though.