Effective megapixels
The number of light sensitive pixels directly involved in the construction of the image. These are the dots on which the “image” projected by the lens onto the matrix falls. In addition to them, there are also service pixels that are not illuminated during camera operation — they provide auxiliary information necessary for processing the resulting image. Also, when calculating effective megapixels, the reserve area required for electronic stabilization is usually not taken into account (see "Image Stabilization").
The value of the number of effective pixels for different modes of operation of the camcorder will also be different. For example, when recording video, many cameras use multiple pixels to build a single dot on the image; this is due to the fact that the sensor resolutions significantly exceed those required for video shooting (for example, the Full HD standard technically corresponds to only 2.07 megapixels). As a result, the image quality depends more on the sensor size (see above) than on the resolution. And among sensors of the same size, high resolution allows user to get better colour rendering and higher clarity (however, not always — a lot also depends on the peculiarities of image processing). If we are talking about photography, then more megapixels means a higher resolution of the resulting image, but the quality of such a picture can be relatively low due to the increased noise level and low sensitivity of each individual pixel.
Touch screen
The video camera has a
touch screen — a display that responds to the user's touch. Such a screen greatly expands the possibilities for controlling the camera and can significantly simplify it. For example, working with the menu is much easier by pressing your finger directly on the lines on the screen; in addition, many models with this equipment allow you to select an object for focus by touching the image on the screen.
Battery type
Battery model name that is installed in the camera. This information will come in handy if you need to replace a failed battery, or buy a spare one. Note that some models can work not only with standart, but also with other batteries — for example, batteries with increased capacity; these moments and models of compatible batteries need to be specified according to the official documentation.
Battery capacity
The capacity of a regular camcorder battery is the amount of energy that it can hold on a full charge. In portable electronics, this parameter is measured in mAh; 1 mAh corresponds to the amount of energy that allows you to give a current of 1 mA for 1 hour. Of course, the higher the capacity, the longer the battery can last; however, keep in mind that the actual power consumption and battery life of modern cameras depends on a huge number of factors, ranging from the class (see "Features") to the specifications of individual electronic components. Therefore, in fact, the battery capacity is a purely reference characteristic, and it is impossible to compare different models with each other by it — for this you should use the directly claimed battery life (see below).
