Under the same pixel, why is the image quality of the card machine not as good as that of the SLR ma

As we all know, pixels are the smallest element that records image information, so how did "image information" come from the optical imaging of the lens.

Let's take a look at this formula first:

The "b" here can be understood as the number of the highest real information points that can be recognized by the human eye and exactly match the real object (hereinafter referred to as the information points) produced by a certain lens in a certain area.

Photosensitive area: i.e. CCD CMOS area, or film area.

Resolution: The resolution of the lens (the resolution of the film when testing the film). Normally, the standard fixed focus lens of the SLR has a resolution of 125 pairs of line mm, the zoom lens is 70 to 110 pairs of line mm, and the ordinary card player may range from 40 to 90 pairs of line mm, but because the resolution of the center of the lens is very different from the resolution of the surrounding area, in order to reflect the maximum theoretical value of "b", we take the center resolution of the lens to calculate.

Suppose there are three cameras, all of which have 15 million pixels, and the lens of the SLR machine takes 100 pairs of lines mm, and the lens of the card machine takes 80 pairs of lines mm, as an example

A: Full-frame SLR (24x36mm), the sensor area is about 864 square millimeters. Calculation result: b = 34.56 million information points.

B: APS-C SLR (, the area of the sensor is about 332 square millimeters. Calculation result: b = 13.28 million information points.

c：1/"The area of the sensor is about 43 square millimeters. Calculation result: b = 1.1 million information points.

To sum up: A: Use 15 million pixels to record 34.56 million information points, because the pixels are smaller than the information points, then these 15 million pixels are all real and valid.

B: 15 million pixels are used to record 13.28 million information points, because the pixels are larger than the information points, the actual clarity of the image is only composed of 13.28 million information points.

C: Use 15 million pixels to record 1.1 million information points, because the pixels are much larger than the information points, the actual clarity of the image is only composed of 1.1 million information points, which is far from the nominal 15 million pixels, which is why the image quality of the card machine is not as good as that of the SLR machine under the same pixel.

The key is the size of the sensor and the size of the lens. There is a big difference between the two.

There are a few reasons for this: Clarity also depends on the resolution of the monitor you're looking at. If the two pixels are the same height, and the ** is placed on the same computer, it is basically difficult for you to distinguish each other with the naked eye.

As for the reason you said, most of the time it is the result of not putting ** on the same monitor. In addition, the hardware configuration of your camera, the photosensitive original or other parts of the card machine are not as good as the effect of the SLR, even if the same pixels, there will be a little difference in shooting.

If the camera on the mobile phone has the same pixels as the professional card machine, the photo effect will not be the same.

No matter how good a mobile phone is, its imaging effect is definitely not as good as that of a digital camera.

Whether it is software or hardware, such as the size of the image sensor, the size of the lens diameter, and the ability to process the chip, mobile phones are far inferior to digital cameras.

Key Factors Affecting Digital** Quality:

1. The size of the CCD area.

The CCD area of a DSLR camera is much larger than that of a home machine. Generally, the CCD area of ordinary household machines is generally 1 inch, etc. Under the same conditions, a 1-area CCD is of course better than a 1-inch imaging***.

2. The diameter and quality of the lens.

The diameter of the lens is large, and the luminous flux is naturally larger than that of the lens with a small diameter, and the amount of luminous flux determines the amount of light information received by the image sensor.

The principle is that there is more money.

If you have more money, you can use a higher pixel sensor, and if you have more money, you can use a larger area sensor, and if you have more money, you can use a better lens and give more good lenses to the lens.

DSLR camera vs. card machine:

The structure of the SLR is complex, and there are more selectable modes than the card machine.

The relative aperture of the SLR lens is much larger than that of the card machine, and the lens resolution is better than that of the card machine, and the density and area of the SLR sensor are stronger than that of the card machine.

The zoom ratio of the lens equipped with the SLR can be very small, and the fixed focus head can also be used, and the zoom ratio of the card machine is generally very large, and the image quality can not be compared with the SLR.

Configuration,SLR lenses,CCD is a few levels higher than the card machine,Besides,How expensive is the SLR,Don't you know the price?

From the point of view of effective pixels, because the area of the sensor is different, the effective pixels of the card machine are never higher than that of the SLR machine. But from the pixel point of view, because some card machines set the pixel height (such as 8m) and some SLR machines set low pixels (such as 5m), so at this time, the pixel of the card machine is higher than that of the SLR.

The most important thing to see in the card machine is the effective pixels, the size of the sensor area, and the image quality effect?

Pixels can't decide everything, the higher the pixel means that the details can be better processed in post-processing, the original film may be very scummy even if the pixel is high, the reason why the SLR is awesome is that it can change the lens, which also provides a convenience for photography that can change the shutter and aperture, for example, large aperture and long time** are not possible for general card machines, if you choose a SLR camera, I personally recommend Canon, after all, it is an old famous factory, EOS550D, 600D, 650D are very suitable for novice cameras, If you don't want to buy more lenses in the later stage, you can consider 18-135 sets.

Because pixels are the most important data for consumers in the development of digital cameras, especially in the early stage, manufacturers are still competing for pixels on consumer-grade cameras in order to cater to consumers. But in fact, the image quality of the camera depends on the quality of the lens and the size of the image sensor, the pixels are actually selected according to the needs of the output after you take pictures, and the largest for ordinary people is to put the full screen on the computer screen**, 800W is enough.

The principle of choosing a DSLR (let's not talk about the full-frame SLR of **):

1.Either a cow or a dog – that means either you buy an all-metal flagship with a shoulder screen, or you buy the most entry-level model in production.

2.Don't be fooled into buying 18-55 sets, first of all, the quality of 18-55 is very anxious; Secondly, 18-55 No matter how well you maintain it, you can't sell it when you want to change it; Also, I bought 18-55, and when you get a little started, in order to make up for the focal length, it is likely to be fooled again, and buy 55-250

3.In the case of insufficient budget, the slag machine bull head strategy - it means that money gives priority to buying good lenses, and the machine can buy discontinued or even second-hand ones.

4.There are too many trolls on the Internet, please use dialectics when thinking about problems. No brand has an absolute advantage, and the so-called penny price is worth the goods, and it will never be biased.

The size of the pixel is only the size, and it does not indicate the sharpness. Clarity is dependent on the size of the sensor. DSLRs such as the Canon 550D 18-135 lens online** can be found on the Buy Slowly.

There are several card machines that are more expensive than SLR, such as Sony black card RX1 and RX100.

No matter how high the effective oak tree of the card is, it is a card, and you can know it by 100% magnifying the comparison! Or shrink into an oak tree.

What's the problem? Nokia also has a 4100W pixel phone!

Pixels are not the most critical thing, SLR also has lenses, imaging, color, aperture, shutter and so on and so on.

The pixel is high, which means that the generated ** is bigger. For example, 17.9 million pixels generate 5184 3456, and 15.1 million pixels generate 4752 3168.

But how much difference can 5184 and 4752 actually look like......

How many times do you have to zoom in on the image to see the difference......

Well, these are pixel literal things, let's talk about the deep stuff of pixels:

The image sensor is one of the most important core components of a digital camera, and its size is directly related to the shooting effect.

Therefore, the most effective way to achieve good shooting results is not only to increase the number of pixels, but more importantly, to increase the size of the CCD or CMOS.

However, regardless of whether CCD or CMOS are used, the sensor size of DSLRs far exceeds that of ordinary digital cameras.

As a result, a DSLR has a single pixel area four or five times that of a consumer digital camera, so it has a very good signal-to-noise ratio and can record a wide range of brightness.

The image quality of a 6-megapixel DSLR is definitely better than that of an 8-megapixel average digital camera, not to mention those 14 million and 16 million differences......

So don't just look at the number of pixels, look at it comprehensively.

Not to mention the lenses, speeds, accessories, and handling beyond pixels, DSLRs outperform ......

The image sensor of the SLR is large, and the card machine is small. The image sensor is equivalent to a container for pixels, and although there are many details in the pixel height, the image sensor is too small to accommodate well. In this case, too high a pixel will reduce the image quality.

Normal, it's useless to look at pixels, the mobile phone is now 50 million pixels and still a mobile phone**, to put it bluntly, the mineral water bottle is more than the wine bottle.

Don't pay too much attention to pixels, Nikon's old machines are not high pixels, but the imaging is very good. No matter how high the pixel of the card machine is, it can't catch up with the ordinary SLR.

The number of pixels is determined by the area of the sensor and the size of a single pixel, and the smaller the single pixel under the same sensor area, the higher the pixel.

However, the increase in pixels comes at a cost, and as the pixel area decreases, the ability of each pixel to receive light becomes weaker, resulting in lower performance in low light, and the density increases, and the circuit becomes more crowded, resulting in various interferences and reduced image quality.

In fact, the lens of the card machine, its resolution can not meet such a high-density sensor at all, for example, a 1600w pixel card machine, when you zoom in to 100% of the shot, there are few details, because the pixel density of the sensor exceeds the lens resolution a lot, high-end card machine, usually the sensor area is larger, and the pixels are low, which can ensure the imaging quality in low light and the purity of the picture under low sensitivity. The reason why the image quality of the SLR is good is that its sensor area is dozens of times that of an ordinary card machine.

PS: Actually, Canon Nikon also has a high-resolution card player.

The pixel of the camera should be matched with CMOS, just the pixel is high, it is useless, and it is a waste!

Lenses and photosensitive components are necessary to determine the best quality, and are not directly related to pixel size.

The 16 million pixel card machine can be put into a very large one. But it doesn't always work out well!

It looks like a DSLR is a telephoto camera, and the photosensitive components are similar to those of the card, except that the optical zoom of the lens is large.

The bigger the zoom, the lower the quality!

It is recommended that you buy a single Panasonic GF2, or a DSLR G12 or something like that.

If the sensor area is small and the pixels are high, the color of ** will be distorted (there will be color spots when zoomed in). Most of the sensors of the current card machine are 1 inch, and 12 million is enough, and many DSLR sensors are also 12 million.

Like Nikon and Canon, they both sell very well, but I personally feel that Canon's digital cameras are more professional than Nikon's. It can be considered to compare the IXUS 510 HS. Great for home.

It's convenient to take pictures when you go out to play. The wide angle is relatively large, and the natural scenery is easier to take into view. The shape is more retro and very distinctive.

WiFi is a feature, you can connect other devices to upload anytime and anywhere, suitable for Weibo control.

CCD small pixels are too high** but the quality is not good, more CCD with how high the pixel is a technical problem, so don't be too obsessed with pixels, the ordinary card machine is almost 14 million, and the most ideal pixel for SLR is about 24 million.

The difference is in clarity. The sharpness of a camera depends on the size of the core sensor (CCDC or MOS size) of the digital camera, the larger the sensor, the clearer the image and the better the image quality. A DSLR is much larger than a card machine's sensor. The clarity of the image has nothing to do with the pixels.

Pixels refer to the effective pixels per unit area of the sensor, and the difference between the area of the sensor of the card and the DSLR is not a point. So the total number of pixels is a world of difference.

As for the pros and cons, the card is convenient and simple. It doesn't matter what happens, just turn on and press the shutter. But out of **. Most of them can only be called photographs.

There is a certain technical content in the use of SLR. There needs to be a certain degree of control over light and color, and of course he has more control over this than with cards. It's not even a ** thing that comes out if it's not good.,If it's used well.,There will be a masterpiece in the world.。。

Moreover, in terms of imaging, the SLR has a more detailed classification and recognition of color and light perception than the card. Cards will group a lot of subtle color differences into one color.