How about buying your own camera to take wedding photos?

Description of several key indexes of digital camera;

1, aperture

It is expressed by the value of f, because it is reciprocal. The larger the value of f, the smaller the aperture. Generally, the maximum aperture of digital cameras is 2.0, and some models are 1.8. F 1, F 1.4, F2, F2.8, F4, F5.6, F8, F 1 1, F 16, F22, F32, F44 and F64.

Simply put, the larger the aperture (the smaller the gear) means the greater the amount of light entering. The advantage of this is that it can maintain a relatively high shutter speed in low light environment without other auxiliary methods.

Another advantage of a large aperture is that a shallow depth of field can be obtained. Simply put, it can blur things beyond a certain distance in the future, which is generally beneficial when shooting close-ups. So try to choose a larger maximum aperture when choosing.

2. Shutter

Simply put, the shutter is a device used to determine the length of light entering. Generally speaking, the larger the range, the better, but it will not be too big in consumer-grade dc, especially the highest shutter. At present, high-end machines generally need more than 1/2000 seconds, so when choosing, you should pay attention to the slowest speed, and it is best to have door B, which means you can decide the exposure time yourself, and many models also have it.

3.ccd(CMOS) size

The size of ccd is the size of photosensitive chip. Generally, the bigger the better, for example, 2/3 is better than11.8 and11.8 is better than 1/2.5. Theoretically, under the same pixel, the larger the ccd size, the less noise it produces, which is reflected in the choice of camera. For example, all cameras are 5 million pixels, one uses a 2/3 ccd and the other uses a11.8 camera. We give priority to 2/3 cameras.

4. Optical zoom

Generally speaking, optical zoom is very different from digital zoom. Strictly speaking, digital zoom is of little practical value. When choosing a camera, we should pay attention to the difference between digital zoom and optical zoom multiple. In fact, the emergence of optical zoom lens is to realize the concept of a mirror traveling around the world. Simply put, it is for convenience and wide application. However, the structure of optical zoom lens is usually very complicated and there are a large number of lenses. When the light enters the camera, the more lenses there are, the more refraction times there will be, and the imaging quality will be affected. So generally speaking, the zoom lens of the same level can't compare with the fixed focus lens. However, when ordinary users buy, there are actually few choices in this respect, because it is of little significance to seriously discuss the imaging quality on general consumer-grade dc. Generally, high-power telephoto machines also belong to some high-end machines, which will not do too badly. You can try to choose them.

5. Pixels

Pixels play a decisive role in the final print size. The general printing resolution is about 240dpi. What is this concept? Here is a simple algorithm. For example, the maximum resolution of a 5 megapixel camera is generally 2560 x 1, 920, 2560/240, which is approximately equal to 10.6. In other words, a 5-megapixel camera can develop photos with a long side of 10 inch on the premise of ensuring the image quality. So before buying a camera, use this formula to calculate according to your own needs and find the balance point between price and demand. But how to choose dc at the same pixel level? The size of ccd was mentioned earlier. At this time, this size is a key indicator, and a larger ccd size is preferred!

6.ISO value

ISO means sensitivity. The higher the sensitivity, the faster you will feel the light. Therefore, the film with high ISO is also called high-speed film, which is suitable for use in low light environment, such as taking indoor photos and night scenes at home. But the higher the sensitivity, the worse the graininess, and the lower the ISO value, the more delicate the picture will be. In DC, the low ISO value is relatively practical, while the high ISO value is relatively poor in DC at this stage, because the picture displayed by DC with high ISO is not as grainy as traditional film, but has a lot of color noise, which seriously affects the output picture. Basically, it can be said that the picture performance of a few high-end machines in ordinary DC is better, but in general, it is still not used as much as possible. Therefore, when selecting DC, the key selection point of ISO value is the lowest ISO value.

7. Manual function

Manual function used to be the patent of semi-professional machines, but now many cheap DC also have semi-manual or full manual function. At the beginning, the manual function may be too troublesome, but with the deepening of learning, the manual function will become more and more useful.

8. Reaction speed

9, continuous shooting function

10, battery characteristics

1 1, camera function