I said I post a pic but it is very large and I'm on dial-up This was taken with a 500mm hand held from a boat in the wind. you can see that the image stabilizer works very well.
The reason I picked the Pentax is that the lens that I had for my K1000 film camera a fit . This photo was taken with a 500 mm reflex lens which on this camera is like a 800mm. The background blur is caused be a short depth of field. The common side efect with this lens is that the back ground high lites look like donuts.