Summary: I just recently migrated to Pentax from a Canon system. As you know, Canon has some really good lenses, but most are big and heavy. When I purchased my Pentax K-5 IIs I also decided I would switch over to primes, or small zooms. For my first zoom lens I wanted to get something that was very functional and would cover a wide range of focal lengths such as the 17-70mm F4.
Summary: The lens is sharp throughout the range, even at f4. Makes an excellent walk around lens. I also considered the Tamron 17-50 f2.8. I happened to find this at a good price so I bought it. I may update to a Tamron later only because it is a stop faster. Otherwise, this lens is an excellent choice for general photography.
Excellent lens, with a very good contrast and a useful 24mm equiv wide angle.
22 January 2014
Summary: I use it 90% of the time on my camera. It is an excellent choice as a walk about for those who prefer wide angles. 16mm is enough for even serious landscapes, and range up to 45mm is just enough for general shooting. The lens has a very nice bokeh, especially for a zoom and has very good contrast and colors.
An excellent all-around lens - great upgrade from kit lens
Prodigal Knot, Amazon
26 June 2013
Summary: This is quite a nice lens in all respects. It consistently produces the famous Pentax colors and provides much improved clarity over the 18-55mm kit lens. It can be a bit soft in the corners at 16mm, but overall, it provides outstanding landscapes and at the narrower end provides a decent natural light capability for cloudy daytime or indoor lighting shots at the constant f/4.0, but you need good light, or higher ISO settings, to get the best use from this lens.
Summary: When I ordered my Pentax K5, I ordered the 16-45mm lens instead of the standard 18-55mm kit lens. At first use, it seemed OK, but each time I used it I was getting better results both indoors and outside. Recently, I used it for some seascape and landscape images while on a camera club field trip.
Summary: Who else but Pentax makes such cool lenses?>? I had been checking out this lens for a while, but held off after reading some negative reviews. The seller 'Generation X' had one for a killer price, so I had to try it. First of all, this is not a light lens,,,,it is somewhat built like a tank. The plastic they use is of a very high quality. The lens hood it comes with is a thing of beauty,,,very hi-quality.
Good, less expensive, alternative to the DA* 16-50
3 June 2012
Summary: 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.