Sensors' Technology

As the digital camera improved each day, the Auto Focus and sensors technology is improved as well. Today’s sensors are totally different than ever.

If you fly over the equipment lists of current models, we read repeatedly of "cross-type sensors" and "line sensors." To understand the concept behind it, one must first distinguish between the auto focus sensor and auto focus areas: the latter are - contrary to popular misconception - just a mark showing in the viewfinder the approximate "effective range" of auto focus.

The actual auto-focus, which is ultimately responsible for setting the video output parameters, is located in the measurement field, but is generally larger than the specified mark. Such sensors finally analyze the incident in the digital camera and make the necessary light for optimum sharpness.

The classic auto-focus worked initially with a line arrangement. Since the first generation of autofocus cameras only one sensor was used, the band position was too concentrated and grows earnings in the course of this sooner. In addition, horizontal line sensors focus no vertical structures and horizontal vertical again, no - a significant disadvantage.

Accordingly, it is not surprising that soon cross type were presented as a logical evolution of the auto focus: This virtue of their "design" both a horizontally and vertically oriented sensor, enabling them - spoken simple - up / down and each side . to focus Modern digital cameras, especially in the professional SLR and design have on the number of cross-type sensors recently increased significantly.

Since such cross-type sensors are extremely expensive, the manufacturer, this technique combines to today with the classic line sensor. A model of the upper class has SLR today to around 45 AF sensors. In comparison, a great mid-range compact camera with permanently installed lens provides about seven sensors, of which only one in cross form.

Title Post: Sensors' Technology
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Author: the Wicaksonos Family

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