These are the best and lightest goggles. It's small and light and doesn't look like a serious lens until you see results. It's awesome. Anyone who regularly photographs with fixed focal lengths knows what a leap in quality you get compared to most zooms. This is no exception. It's wide open and very sharp at all f-stops in between. In fact, I almost always use f/2.8 wide open. This is my lens when I need to take a picture. Fantastic. It is as small and light as the other Limited lenses in the Pentax range. In fact, for many years all my travel gear consisted of Pentax 15mm, 40mm and 70mm Limited lenses. They are amazing and with one lens on my camera and two in a bag I can handle almost any situation. I would highly recommend them to all Pentax users. I've had the original (non-HD) version of this lens since 2007. It broke last year (the autofocus stopped) and I *had* to get it. This newer HD version has a softer bokeh and is otherwise exactly the same as the original. Small and light, this is a wonderful little gem of a lens.
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