Re: Need a good review site ... Lots of user comments on Pentax K-Mount lenses: http://stans-photography.info/Introduction.shtml For technical data on SMC Takumar lenses, much of which is applicable to the K series: www.yaremko.com You can also mount the A series lenses on your K2, although the lens will not have automatic exposure. It will perform as a K lens would. The A series offered two advantages: 1: The optical formula was tweaked, resulting in more sharpness, especially in the corners 2: The A series are a bit cooler than the previous lenses (K and M). The K series (that is, the original K-mount lenses that were introduced in 1975) have incredible build quality--better than the A series. Many of the K series were ported over from the previous generation of screwmount lenses, the SMC Takumars, which also had that incredible build quality. See this article for details: http://www.luminous-landscape.com/columns/sm-02-11-24.shtml Jeremy
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