Some people do not understand the instructions of digital cameras. For example, "pixel", there are "total number of pixels" and "effective number of pixels" two. So what kind of specifications should be noticed to determine the performance of the camera?
The most critical are "number of pixels", "CCD size", "zoom magnification" and "lens brightness"
Digital cameras work by first receiving light through the lens and then using a photographic element called a CCD (sometimes using a CMOS sensor) to convert the received light into an electrical signal. Finally, the electrical signal is recorded as data. To the built-in memory and memory card. Therefore, the basic performance of a digital camera can be said to be greatly influenced by the photographic elements and the lens.
However, there are problems such as ease of use and convenience of holding the device in actual use. If you have the opportunity, it is advisable to go to the store to actually get a look, or consult with friends who have already purchased a digital camera.
"Number of pixels" and "photographic element"
Regarding "photographic elements", "number of pixels" and "CCD size" are the most critical.
The first thing that catches the eye in digital camera specs and advertising is generally "how many megapixels." The number of pixels can be understood as a grid-like thing provided on a photographic element. The color and intensity of light can be received in the camera in this raster unit. Therefore, the finer the grid (that is, the more pixels), the finer the particles of the photo. Correspondingly, the details of the subject are performed better.
The specifications often include two numbers, "total pixels" and "effective pixels." The total number of pixels, as the name implies, is the total number of pixels the index code camera has. However, in actuality, pixels outside the image sensor are not used when generating image data.
Therefore, the number of pixels available for photographs other than pixels that are not used is the "effective number of pixels." Since the existing specifications will definitely indicate the "effective number of pixels," it is best to compare them.
In addition, the size of the photographic element (CCD) is also important. If the number of pixels is the same, the larger the photographing element, the larger the size of each pixel. The larger the pixel size, the greater the amount of data that can be processed, and the difference in the color and intensity of the subtle light. In other words, it is possible to generate richly textured photos.
Mid-range digital cameras typically use 1/2.7-inch to 1/1.5-inch CCDs, but some advanced SLR cameras may have more than 1 inch.
"Zoom magnification" and "Aperture value (F value)"
On the lens side, "zoom ratio" and "F value" are the most critical.
For digital cameras, the larger the zoom magnification, the more convenient the telephoto shooting. However, the larger the lens, the higher the price.
If you only use a digital camera for recording purposes and use the lightest possible product, you can choose a product without a zoom function. If you need a little bit of zoom, a 3x zoom function will be sufficient.
However, "Optical Zoom Magnification" and "Digital Zoom Magnification" may appear in the specifications. Which reflects the lens performance is "optical zoom."
"Digital zoom" refers to the function of cutting out part of an image and zooming in. Therefore, the more you zoom in with the digital zoom, the worse the picture quality will be.
Incidentally, since the focal length of the lens varies depending on the size of the photographic element, direct comparison does not make much sense. Basically, all specifications will show the focal length converted into a 35mm camera.
The "F value" indicates the lens brightness. When shooting without a flash at noon, reaching F4.5 is enough. However, when shooting in the evening or in dimly lit rooms, it is best to reach F3.5 or F2.8.
Even so, the performance of the lens cannot be judged by the specifications alone. The ambiguity, the performance of color performance, and the amount of external light and aberrations are not included in the specifications. In addition, the purpose of photography is different from personal interests and preferences are different. It is best to refer to the test report published in the magazine.
Other areas that need attention The specifications that affect the ease of use of the camera include the time from when the power is turned on to when it can be shot, the minimum time that can be shot continuously, and the time lag between when the shutter is pressed and when the shutter is closed. In order not to miss any shooting opportunities, it is clear that the smaller the value of these indicators, the better.
The most critical are "number of pixels", "CCD size", "zoom magnification" and "lens brightness"
Digital cameras work by first receiving light through the lens and then using a photographic element called a CCD (sometimes using a CMOS sensor) to convert the received light into an electrical signal. Finally, the electrical signal is recorded as data. To the built-in memory and memory card. Therefore, the basic performance of a digital camera can be said to be greatly influenced by the photographic elements and the lens.
However, there are problems such as ease of use and convenience of holding the device in actual use. If you have the opportunity, it is advisable to go to the store to actually get a look, or consult with friends who have already purchased a digital camera.
"Number of pixels" and "photographic element"
Regarding "photographic elements", "number of pixels" and "CCD size" are the most critical.
The first thing that catches the eye in digital camera specs and advertising is generally "how many megapixels." The number of pixels can be understood as a grid-like thing provided on a photographic element. The color and intensity of light can be received in the camera in this raster unit. Therefore, the finer the grid (that is, the more pixels), the finer the particles of the photo. Correspondingly, the details of the subject are performed better.
The specifications often include two numbers, "total pixels" and "effective pixels." The total number of pixels, as the name implies, is the total number of pixels the index code camera has. However, in actuality, pixels outside the image sensor are not used when generating image data.
Therefore, the number of pixels available for photographs other than pixels that are not used is the "effective number of pixels." Since the existing specifications will definitely indicate the "effective number of pixels," it is best to compare them.
In addition, the size of the photographic element (CCD) is also important. If the number of pixels is the same, the larger the photographing element, the larger the size of each pixel. The larger the pixel size, the greater the amount of data that can be processed, and the difference in the color and intensity of the subtle light. In other words, it is possible to generate richly textured photos.
Mid-range digital cameras typically use 1/2.7-inch to 1/1.5-inch CCDs, but some advanced SLR cameras may have more than 1 inch.
"Zoom magnification" and "Aperture value (F value)"
On the lens side, "zoom ratio" and "F value" are the most critical.
For digital cameras, the larger the zoom magnification, the more convenient the telephoto shooting. However, the larger the lens, the higher the price.
If you only use a digital camera for recording purposes and use the lightest possible product, you can choose a product without a zoom function. If you need a little bit of zoom, a 3x zoom function will be sufficient.
However, "Optical Zoom Magnification" and "Digital Zoom Magnification" may appear in the specifications. Which reflects the lens performance is "optical zoom."
"Digital zoom" refers to the function of cutting out part of an image and zooming in. Therefore, the more you zoom in with the digital zoom, the worse the picture quality will be.
Incidentally, since the focal length of the lens varies depending on the size of the photographic element, direct comparison does not make much sense. Basically, all specifications will show the focal length converted into a 35mm camera.
The "F value" indicates the lens brightness. When shooting without a flash at noon, reaching F4.5 is enough. However, when shooting in the evening or in dimly lit rooms, it is best to reach F3.5 or F2.8.
Even so, the performance of the lens cannot be judged by the specifications alone. The ambiguity, the performance of color performance, and the amount of external light and aberrations are not included in the specifications. In addition, the purpose of photography is different from personal interests and preferences are different. It is best to refer to the test report published in the magazine.
Other areas that need attention The specifications that affect the ease of use of the camera include the time from when the power is turned on to when it can be shot, the minimum time that can be shot continuously, and the time lag between when the shutter is pressed and when the shutter is closed. In order not to miss any shooting opportunities, it is clear that the smaller the value of these indicators, the better.
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