Zoom

1, iesp autofocus iesp English intelligent electro selective pattern (intelligent electronic selection mode) abbreviation. Iesp autofocus is a digital camera that does multi-block segmentation within the focus range (the segmentation method is called sector segmentation with data), and then combines the measured focus position of the segment block to determine the best focal length based on the subject's different states. . Iesp autofocus is often seen in the introduction of Olympus digital cameras.

2. Another focus of the zoom lens is the zoom capability. The so-called zoom capabilities include optical zoom and digital zoom. Although both of them help to enlarge remote objects when telephoto shooting, only the optical zoom can support the imaging of the image body, adding more pixels, so that the subject is not only bigger, but also relatively clear. In general, the larger zoom factor is more suitable for telephoto shooting. Optical zoom, like traditional camera designs, depends on the focal length of the lens, so resolution and image quality do not change. Digital zoom can only reduce the size of the original image, so that the image becomes larger on the LCD screen, but it will not help to make the details clearer. Therefore, when buying a digital camera, we often suggest that you pay attention to the multiple optical zoom. At present, mid-range cameras generally have about 3 times optical zoom, but there are also products with a long zoom function, such as 10x optical zoom models.

3, optical zoom is to rely on optical lens structure to achieve zoom, zoom and 35mm camera is almost the same, that is, through the camera lens movement to zoom in and out the need to capture the scene, the greater the optical zoom, the more the scene can be shot. Today's digital cameras have optical zoom ratios between 2x and 5x, and some code cameras have a 10x optical zoom. The home camcorder has an optical zoom factor of 10 to 22 times, and it can clearly capture something 70 meters away. Using an extender can increase the camera's optical zoom factor.

4, digital zoom that is digital zoom, in fact, the picture of the electronic amplification, the original ccd image sensor on a part of the pixels using interpolation processing method to do the amplification, the ccd image sensor pixel interpolation algorithm to enlarge the screen to The entire picture. With digital zoom, the scene is zoomed in, but its sharpness is reduced to some extent. It's a bit like a zoom function in vcd or dvd, so digital zoom does not have much practical significance. At present, the digital zoom of a digital camera is generally about 6 times, and the digital zoom of the camera is about 44-600 times, and 40 times is actually enough. If the zoom factor is not enough, we can add a multiplier before the camera. If you take a small view, you can add a wide-angle lens accordingly.

5, smart zoom brand new unique sony intelligent zoom function. Can zoom in zoom shot, will not enlarge the particles, so that the enlarged image can also maintain the original fine quality. The intelligent zoom provides different levels of enhanced zoom function depending on the choice of different image sizes. Unlike digital zoom, Intelligent Zoom maintains the same quality as the original image.