Instruct: Classify Amazon reviews into positive or negative sentiment
Query: Good, less expensive, alternative to the DA* 16-50

In the Pentax line - the DA* 16-50 is one of the most desired lenses - it is weather sealed and has a fancy, almost silent internal motor for focusing. It also costs twice as much as this lens and that cool motor is prone to break, often.This 16-45 lens is well built, though made of mostly plastic - it is good quality and the lens is pretty durable. Granted - it is NOT weather sealed - so don't take this out in a rain storm - but it has served me well outdoors and is pretty solid. Images come out great, little CA and color and clarity are there. For me - that extra 2mm on the wide end makes a great difference from the classic 18mm wide kit lens start point, though I do wish it went to 50mm on the tele side.Overall, for the money, this is great lens. If you can afford the DA* - by all means go for it - for those of us on a budget - this is a great alternative.