Aperture settings are controlled using seven different Waterhouse stops, ranging from f/1.9 to f/16, and the bright f/1.9 maximum aperture is especially well-suited to shallow depth of field effects and working in low-light conditions. Russian glass is used to deliver a high degree of sharpness and color accuracy and a simple, manual geared rack focus system permits working with subjects as close as 2' away. Emphasizing the swirly bokeh quality of this lens design, this 58mm version incorporates a unique Bokeh Control Ring on-top of the lens to adjust the bokeh intensity within a 1-7 Level range. Designed for Canon EF-mount cameras, this lens simulates the look of the first Petzval lens from 1840, yet updated for use with current 35mm film and DSLR cameras.
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