Knowledge of Digital Cameras 40

The imaging surface of the camera is composed of a sensor one by one, the pixel is the smallest sensor unit on the camera chip, each pixel corresponds to a pixel on the image, the pixel size refers to the size of each pixel, the common ones are, the imaging surface is generally CCD or CMOS element, and the imaging size is also called the target size, which is generally expressed in inches and in the format of 1 n inch, such as 1 2''It represents inches, and the size here refers to the target surfaceDiagonal size

It is worth noting that the conversion from inches to millimeters here is not the usual 1 inch=, but only 1 inch=16mm. Why is the digital camera CCD size unit "inches" not 1 inch in the conventional sense =, here follows the outer diameter size of the vacuum tube of the early video recorder 1"(, but excluding the thickness of the glass tube, the imaging area is actually only 16mm, which is 1" = 16mm in the CCD specification.)

However, the actual calculation shows that the different dimensions are not strictly 1" = 16mm, and some may be more than 1 inch mm, etc., for ominous reasons. For example, 1 4''= 4mm, but 1 3''=6mm。

The original resolution is the number of pixels on the target surface, such as 1920h*1080v. Represents horizontal and vertical resolutions, respectively.

Refers to the actual physical size represented by each pixel on the image, and through preliminary reference to the information, I feel that this is related to the distance of the photographed object from the lens, and the farther the distance, the lower the accuracy.

Digital cameras have quickly entered people's lives and become a part of people's leisure hobbies. It is not an easy task for novices to shoot a good **. Let's talk about what the tips for using digital cameras are.

1. Set parameters: In the daily shooting process, you need to set some basic parameters of the camera in advance. In the settings menu of a digital camera, there are generally a variety of settings for the number of pants, including image resolution, focusing method, aperture, shutter, etc.

The most important thing for novices to use a digital camera is to set the image resolution. Most digital cameras offer a variety of resolution options, and since digital cameras have a variety of parameter settings, it is essential to check the camera's settings menu before each shoot to confirm that the resolution, shutter, and other parameters are set correctly. Otherwise, the resulting ** may not achieve the desired effect.

2. Lock the subject: When shooting with a digital camera, in order to achieve better results, you should try to choose the resolution and fill the frame of the subject. Digital cameras, like traditional cameras, are mainly concerned with framing, composition and focusing, and all other photographic fundamentals apply.

However, if there is only one subject, the subject should fill the frame. The frame is a good choice for framing when shooting, and it can effectively capture the subject of the subject by placing it in the frame.

3. Correct use of illuminance and flash: Most digital cameras have built-in flash, which generally has four levels: flash, no flash, red-eye flash and auto flash.

The autoflash level is the camera's detection of the subject's illumination to determine whether the light needs to be supplemented with flash. The flash is not as easy to control as other light sources, and the light emitted by the flash is easily reflected back by the surrounding objects, forming an uneven spot on the **. Therefore, the use of flash is highly likely to ruin the perfection of **.

When shooting indoors, try to turn off the flash and provide adequate illumination.

4. Adjustment and compensation: The digital camera adjusts the amount of the photographed scene according to the metering, but due to the uneven brightness distribution of the photographed object, there may be: for example, the backlight of the person in front of the bright background, which makes the person insufficient.

At this time, you can use ** compensation to solve this kind of problem, the camera with ** compensation can usually be adjusted, -1, -2 and so on, if the subject ** is insufficient, then use positive compensation to increase the ** amount, on the contrary, use negative compensation to reduce the ** amount.

The above is an introduction to the use of digital cameras, I hope it will help you.