 | December 20, 2012 Breaking news from America's top photo magazines |   | |  | Our readers wowed the judges with thousands of great images From the shores of South Africa to a basement in Lincoln, NE, you, our readers, found beautiful images wherever they lurked. Whether the subject was glamorous and exotic or simply a collection of household items, this year’s submissions impressed our editors enough that we had a very hard time picking our finalists. |
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 Be the first to hear about new stuff on PopPhoto.com by subscribing to our revamped RSS feed! | | | TECH SUPPORT Why are Midrange Apertures Sharper?
Judging by reader mail, there’s still some confusion out there about aperture selection and image sharpness. While smaller apertures (e.g., f/22) produce deeper slices of sharpness from front to back, the central focused-upon subject of your picture will usually always be sharper when captured by an intermediate aperture (e.g., f/8).
Why? Because of diffraction. When light rays strike an object, such as the diaphragm blades of a lens, the rays tend to bend or diffract, an action that adversely affects sharpness. When you set your smallest aperture, a greater percentage of all the light rays transmitted through the lens are diffracted, resulting in a subject that’s relatively fuzzy compared to what’s possible with the less-diffracted rays typical of wider apertures.
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