With a few noteworthy outliers, the majority of smartphone cameras have a few presets for digital or optical zoom. But with LG Innotek's recent announcement of its new Optical Telephoto Expand Camera Module, that might soon change.

All you're really doing when you use the digital zoom on a smartphone, or even on a less expensive point-and-shoot camera, is enlarging the pixels in the center of the image. Because of this, the image becomes grainier as you close in.

Certain cell phones do make use of separate optical telephoto modules, each with a distinct focal length. While these enable sharper pictures than digital zooms, users must select from the available lens lengths rather than constantly zooming from one to the other. These numerous components also occupy room in the phone that could be used for other things, like a bigger battery.

LG's Optical Telephoto Zoom Camera Module, which is built into the back of the phone, is intended to address these drawbacks by enabling users to constantly visually magnify through the range of 4- to 9-times magnification. It accomplishes this using a true zoom lens, literally moving the lens in micrometer steps (a micrometer is one one-thousandth of a millimeter).

To reduce blur in pictures shot with extended lens lengths, the module also has an optical image stabilizer. Digital image stabilization, which corrects for camera motions by (slightly) computationally zooming in on pictures, produces images that are less sharp than optical image stabilization

The new section is also said to be smooth enough to prevent phones using it from experiencing a "camera bump

In order to create software with functions like autofocus, auto-exposure, auto white balance, and lens shading adjustment for the Optical Telephoto Zoom Camera Module, LG Innotek is presently collaborating with Qualcomm Technologies. When the technology might start showing up in smartphones that are sold publicly is presently unknown.


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