Sigma has just announced a new version of their 18-250mm superzoom for Pentax called the Sigma 18-250mm F3.5-6.3 HSM Macro. Compared to its predecessor, this lens features improved optics and can focus on subjects as close as 35 centimeters. In addition, its external barrel is made of a special composite material which does not respond as much to variations in temperature as normal plastic, meaning that the new lens will perform better consistently in extreme weather conditions.
This new lens is also both smaller and lighter than its predecessor, weighing in at only 16.6 oz (470 grams). More details on it can be found in our Sigma lens database.
It will ship in July for $499 and is also available for Canon and Nikon DSLRs. The new 18-250mm is already available for pre-order at retailers, and at this price, it costs only $20 more than the current lens.