Pentax Q 15-45mm f/2.8 Telephoto Zoom (06)

Nothing like it in any format. This is the equivalent of a 70-210mm full frame angle of view, with a constant 2.8 maximum aperture. It is very sharp, reasonably quick in focusing and very small and light. It is about a tenth the size and weight (and price!) of a full-frame 70-200. If you are unfamiliar with small format cameras you will be surprised at the quality of images this lens (as well as the other Q system lenses) can produce. It is somewhat fragile, I've had one go bad on me, when the internal electronics go it is unusable in any way. Despite that, I bought another to replace it.

Great for Personal Use I bought this lense for my husband's pentax camera. He had been playing around with his camera a lot more since getting this lense. The pictures are very detailed, crisp, and vibrant. I highly suggest this lense.

Good Lens This is a good lens, but my experience - and the experience of others - does cause me to question how long the focusing will function.