The Lensbaby arrives with an f4.0 aperture disk installed, but in seconds you can switch to one of three additional settings. f2.8 achives a difused, almost impressionistic look. f4 is sharper that the f2.8, but still slightly diffused f5.6 is a very versatile aperture in a Lensbaby f8 has a sharper look, but still gives soft edges.
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