Jerome, the Sigma lenses that you have cover focal length form 24 mm to 200 mm, whereas Pentax lenses cover from 16 mm to 135 mm. So that Pentax range is wider and shorter. Not knowing your style I cannot produce any reasonable opinion. However, if your Sigma lenses work for you - why bother? I mean, if they answer your photographic needs, then perhaps you don't need any change. If, however, you observe that these Sigma lenses have problems such as AF or other compatibility issues with K10D, then it would be a time to take action. I should however point out that it does not follow from your original message.
Perhaps, instead, if you feel like shopping, you would consider a primer lens ;-). -- Boris -- PDML Pentax-Discuss Mail List [email protected] http://pdml.net/mailman/listinfo/pdml_pdml.net to UNSUBSCRIBE from the PDML, please visit the link directly above and follow the directions.
