Nice post with lots of great information. Thanks to Gema Ramadhan for posting.

Gema Ramadhan | 1112505639

LENS ELEMENTS & IMAGE QUALITY

All but the simplest cameras contain lenses which are actually comprised of several “lens elements.” Each of these elements directs the path of light rays to recreate the image as accurately as possible on the digital sensor. The goal is to minimize aberrations, while still utilizing the fewest and least expensive elements.

lens elements diagram

Optical aberrations occur when points in the image do not translate back onto single points after passing through the lens — causing image blurring, reduced contrast or misalignment of colors (chromatic aberration). Lenses may also suffer from uneven, radially decreasing image brightness (vignetting) or distortion. Move your mouse over each of the options below to see how these can impact image quality in extreme cases:

Original Image Loss of Contrast Blurring
Chromatic Aberration Distortion
Vignetting Original

Any of the above problems is present to some degree with any lens. In the rest of…

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