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Lens Bokeh Explained, by Mitch Gross

Lens Bokeh Explained, by Mitch Gross | rockatuie's stuff | Scoop.it

Posted by Mitch Gross on October 16, 2012

 

"Bokeh is one of the more misunderstood concepts in optics. The term was coined for photographic use in 1997, from the Japanese word boke, meaning blur or haze. In recent years, “bokeh” has been simplified to refer to how the shape of a lens’ iris is rendered in out-of-focus points of light in an image, such as streetlamps at night. Much is made of how many iris blades are used in a lens and how round the iris aperture is as it is stopped down, but these are only minor aspects of bokeh.


The bokeh of a lens defines how that lens renders the out of focus portions of the image. In representing a three-dimensional space on the two-dimensional field of a photographic plate, the geometry of the path light takes through the lens elements can become apparent. As elements within the frame move out of focus (further from the third dimensional “Z-axis” center of the image) and further from the middle of the frame (the two dimensional “X-axis” and “Y-axis” center of the image), the Z-axis distance can begin to interact with the X- & Y-axis distances, causing a curving of the image. The visual effect is to create a spherical or tunnel-like rendering of the image as it progresses from the plane of focus. The more pronounced this effect, the more “coarse” the bokeh. A highly corrected bokeh minimizes the rounding effect, rendering a more flat field as the image shifts focus."

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blog.abelcine.com


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Create stunning infographics with this collection of tips & tutorials...

Create stunning infographics with this collection of tips & tutorials... | rockatuie's stuff | Scoop.it

Infographics represent graphically where data and information meets design. These visual representations are able to quickly and effectively share knowledge with your audience.

 

In this post, learn how to create stunning infographic with these very useful tutorials and articles. They will arm you with all the latest techniques and information to help you achieve your infographic design creation...

 


Via Lauren Moss
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