[Wingincamera]

I have had my K-5 II for over a year now, with many lens changes in the field. Yesterday I was out taking photos and made three lens changes. When I got back home I discovered all the photos taken after the second change had this big dust spot in the middle of the sensor, even showed up with wide open aperture. I had the sensor clean action to work at start-up. I am happy to report that all I had to was use a "Rocket" hand blower during sensor clean operation and all is good. That was one of the things I liked about the Pentax when I first switched from a Canon 5D to Pentax. That 5D wasn't called a "dust magnet" for nothing. I am hoping to never have to wet clean a sensor again, but if I do I did get lots of experience with the Canon.

[calicojack]

My K5II stays way cleaner than my K10D ever did. I guess the guys at "Pentax design" figured out the right way to do sensor shake and the right coatings to use.

[BrianR]

I change lenses in the field in less than ideal locations frequently and often shoot at high aperture (macro/closeups). With a k100d, I'd take the blower out when the dust started to get objectionable - every 2 or 3 weeks or more often, and I'd end up doing a wet clean every 2 or 3 months. It took about 10 months of the same use before I had any objectionable sensor dust on my k5iis that even needed a blower. The built-in dust removal does a dandy job.