2 April 2011, 22:32 | Elja Trum | 1938x read

How CCD sensors are made

Did you ever wonder how CCD sensors are made? A CCD, or Charge-coupled device, is the chip that converts light into electricity and is how a digital camera can record images. The Science Channel has a 'How Its Made' segment in their program where they answer this question.

Nowadays most DSLRs use CMOS sensors instead of CCD. These CMOS sensors are cheaper to manufactor. In their earlier days CMOS sensors produced more image noise that CCD sensors. Today the difference in quality is minimal. If you're wondering about the differences between these sensor types, check out this How Stuff Works article.

Source: Petapixel

Elja Trum   About the author; Elja Trum
Elja Trum is founder of Photofacts and author of a Dutch book on black-and-white photography. In his daily life he is an e-business consultant with Directshop.
Elja uses Twitter, is married and father of Mika and Vera.
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Focus stacking; creating a large depth of field

Depth of field is the part of an image that is in focus. The depth of field can be very large or very shallow. This depends on the lens you use, the aperture you've set, the size of your sensor and your distance to the subject. Most of the time you can get enough depth of field, but if you can't there is a way to combine the depth of field of multiple photos. This is called focus stacking.

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