High score in photography knowledge! There is an urgent need for extra points to do judgment questions.

The viewing mode is wonderful, but I object to summarizing two different photography methods on the screen. After the film is scanned and posted on the Internet, it is already a digital picture. Can it be called: Figital attacks numbers with digital processing of film?

You're not stupid enough to shoot a 100-meter race with a small DC. Conversely, Mamiya 6x7 is not the first choice for taking photos in your daily life. One is "underutilization" and the other is "overuse", which will always be the "gold standard" in equipment selection.

2. Pixel value is the most critical for digital SLR camera imaging.

The higher the pixel, the higher the resolution, and there is basically no error. But notice that pixels are different from pixels. It is also important to have a large single pixel area and low signal-to-noise ratio, which can achieve better dynamic range and low noise. It is also the area difference of a single pixel that causes the image quality of a small DC with 8 million pixels, especially for digital SLR cameras with high ISO, whose noise suppression level is far less than 6 million or even 4 million pixels.

Resolution is a very important aspect of digital imaging technology. Equally important are dynamic range and signal-to-noise ratio. How to achieve high pixel, high dynamic range and low signal-to-noise ratio is still a challenging subject compared with the current technical level.

3. Full width is the last word.

This idea comes from the "outsole is the last word" on the film machine. Large format does have advantages, at least the room is large and can hold more pixels. Moreover, the increase of photoreceptor area can make the area of a single pixel larger, thus achieving low signal-to-noise ratio and high dynamic range.

It is worth noting that the digital revolution has just begun, and the whole picture is only a development direction of digital images, not the only direction. X3, 3/4, DX format and other technologies are constantly improving and developing. If one day DX format gets a technical breakthrough, you can get super-high quality pixels in a smaller format. Combined with the inherent optical weakness of the whole frame in wide angle, DX frame may become the technical leader. X3 is the same as three quarters. If they overcome their weaknesses in the future, perhaps their technical prospects will be much broader than we thought. No one can tell what will happen in the future, and talking too much will not solve our actual equipment problems.

Based on the current technology and our experience, the whole map has great advantages. However, it will take time to observe whether the whole image can finally become the commanding height of digital imaging technology.

4. The automatic white balance of digital SLR camera is difficult to do well.

At present, the automatic white balance function of digital cameras is weak, mainly because there are still many shortcomings in the detection of environmental color temperature by cameras. The high-end model AWB is slightly better, but it is far from perfect. There are several things that can be improved.

First of all, you must make sure whether your monitor reproduces colors normally. It is suggested and encouraged to use ColorVision Spyder (commonly known as Spider) to calibrate the monitor regularly. The best state of display calibration should be hardware calibration, and manual intervention with personal experience should be minimized. Although spyder is also involved in the human experience, it is still much better than all software calibration.

Secondly, if conditions permit, it is suggested to manually set the white balance with the gray board when shooting, and at the same time, take a photo with the gray board at the scene for later adjustment. Whiteboards are not recommended, because the whiteboards found at hand are generally not pure white and are easily affected by exposure, which may mislead the camera and PS white straws later.

Finally, be familiar with the color temperature working range of various cameras and the best working range of AWB. If it exceeds this range, it is necessary to set the white balance manually, which can reduce the error rate of automatic white balance.

5. In JPEG format, camera sharpening is better than post sharpening.

If you are looking for image quality instead of just playing, then use the post-sharpening method! The order in which the machine processes pictures is to sharpen them first and then compress them into JPEG pictures. After sharpening in the machine, the halo effect will be amplified in the compression process and the noise will also increase.

If it is serious photography, it is necessary to turn off the built-in sharpening of JPEG format and choose post-image processing software to complete this task.

6. Change the lens frequently, and the photoreceptor is easy to accumulate dust.

Even if you never change your head, the low-pass filter in front of the photoreceptor will still be covered with dust. Digital cameras are different from small DC. It has a shutter and a reflector. The repeated vibration of these mechanisms will make the air circulate and roll up tiny dust during shooting. Electronic mechanisms, such as photoreceptors, will have static electricity to absorb these dust.

One of the advantages of digital SLR cameras is the flexibility of changing lenses. We can't take an ostrich attitude and avoid changing the lens because of the dust problem. As for the methods of dust removal, there are various methods on the Internet, each with its own advantages. There are many products on the market, which are expensive. Just study and spend money on it. You have bought all the pork, so don't be reluctant to part with chopped green onion.

7 .photoshop is in hand, and I will handle the exposure latitude.

Indeed, Photoshop can improve exposure latitude through two photos with different exposures. But this method is not always effective. Sometimes you don't get a chance to take a second photo. And you need working time and skills in front of the computer. There is no such thing as a free lunch. The more PS, the greater the risk of image damage.

The best way is to solve the problem in the early stage and control the exposure of the picture within the tolerance range in the camera. This saves time and effort, and there is no image quality damage. Why not spend more time with your family by saving time?

The way to control exposure latitude in the early stage is a medium-gray gradient mirror.

8. On the digital camera, the dog's head is not a dog, and the cow's head is not a cow.

Accurately speaking, the dog's head is not a dog, and the cow's head is more cattle. The digital camera only shoots the middle imaging part, so the optical performance of the dog head is improved compared with the film machine. The same is true for tauren, which should perform better than the film machine.

However, for lenses with a long history of design, the optimization of digital machines is not considered, so these lenses, whether dogs or cows, generally do not perform well on digital machines.

At present, various manufacturers are scrambling to launch "digital-optimized" lenses, which really perform better than ordinary lenses on digital computers. Digital users should look for their goals in these shots when buying.

9. Metal digital cameras are better than plastic ones.

This statement is based on the theory that metal is more durable than plastic, and it is a continuation of traditional fuselage positioning on digital computers. Digital technology is advancing by leaps and bounds, and the market life cycle of a digital model is only about 2 years. You may be good at using a metal body for 20 years, but the digital imaging part is far behind in 2 or 3 years. 10 years later, you are not holding a good digital camera, but a good metal pimple.

Another reason to support the metal machine is the feel. Feel is the most subjective thing, and it is impossible to quantify and compare. Some people like the thickness of metal, while others don't like the coldness of metal in winter. Some people like the lightness of plastic, while others hate the texture of plastic. There is no right or wrong, just personal preference.

It should be noted that plastic and plastic are also different. Different manufacturers and models of plastics have different composition materials and proportions, and their firmness and feel are also different. The advantages of plastic are light weight, low price and enough strength to reach a certain bottom line. Because the price is relatively low, upgrading the camera in the future is not too painful.

For most amateurs, a digital computer with a plastic body is very suitable.

Digital cameras are impetuous.

Digital cameras are just tools. Whether you are impetuous or not depends on your mentality. Yes, digital cameras have little pressure to press the shutter, so it is easy to take many photos. But not the tools it uses, but the people who use them. In other words: the good thing is that it is digital, and the bad thing is that it is digital.

Digital camera only provides a hotbed, but it has become a scapegoat for photographers' impetuousness.

1 1. If you play the film directly, the image quality of a digital SLR is not as good as that of a small digital camera.

Because the small DC is located in direct cinema, there are many built-in software interventions. So it seems that the direct production of small DC is cleaner, and exposure latitude is better. However, at high sensitivity, the image quality of small DC decreases obviously. Under the same conditions, the advantages of digital SLR are enormous.

12. The digital SLR without photoshop is basically half-disabled.

First of all, as long as it is used properly, the digital SLR will not lose to the small DC. Secondly, the requirements for image quality vary from person to person. Some people think it's good to show the film directly, while others think there is room for improvement. Photoshop is an essential tool to obtain high-quality pictures. What would you do if both the small DC and the digital SLR scored 5 points and the digital SLR could reach 10 after PS? On the other hand, what is your purpose of abandoning small DC for digital SLR? Is it to use less PS? Or get high-quality pictures?

Less PS and high quality images are impossible under the current technical conditions. But digital SLR is also wonderful without PS, and disability theory is just a psychological hint for beginners.

13. Resolutely refuse to make a digital mouse, and don't donate the previous research and development expenses to the manufacturer, and then buy it when the digital SLR is mature.

This involves the perspective of considering the problem. I am a major photographer and equipment buyer. You are taking photos instead of testing, and the standard of equipment maturity only varies from person to person. When buying equipment, consider your own needs more and care less about other people's affairs. This is the correct attitude. You can not buy some equipment for the time being, but it should be out of "self-interest" consideration. If the starting point is "against him", you will never get pleasure from photography and equipment fever.

14. The cost performance of digital SLR is much lower than that of film machine.

In terms of price alone, the price of film machine is much cheaper than that of digital machine. But "cost performance" includes both sex and price. "Price" is real, and "sex" can be an unclear topic. Cost performance is a very personalized thing, and everyone's cost performance standard is different. Considering the degree of fever, economic affordability, photography use and other factors, everyone has different judgments.

15. The advantages and disadvantages of lenses from different manufacturers can be compared with digital machines.

The imaging contrast between lenses should be carried out on the same camera in order to draw an objective conclusion. Comparing the same lens or even different lenses with different cameras, the conclusion is not credible. Because the photoreceptors of different cameras have different photosensitive characteristics, the resolution and color reproduction are slightly different. If we compare the lenses on different photosensitive platforms, the conclusion is not rigorous.

In the future, I met Canon -A 1 on the forum. I used 10D to say that Canon's 50/ 1.8 was unstoppable, and I used D70 to say that Nikon's 50/ 1.8 was sharper than Canon 10. We should ignore such comments.

16. Canon is far ahead of Nikon in digital field, Nikon and Canon are far ahead of other companies, Fuji is far ahead in image quality, X3 technology is far ahead of Bayer pattern, and 3/4 system is the future development direction of digital cameras.

Anyone can make any comments on the Internet. With the rapid development of technology and technology, it is very common that similar products complement each other. Any so-called "far ahead" in the forum needs careful verification. Any topic on the forum that predicts the future direction should be in doubt. We photographers are not professionals, have no professional experience, think independently and listen to other people's suggestions. We should draw as few conclusions as possible, especially with exaggerated words.

What needs to be clear is that market share never equals technical content, and advertising never represents the future direction.

17.RAW format is the best.

In terms of image quality, RAW should be the best. But what's your bottom line? This is another hairy question. Some people need to play movies quickly all the year round, and at this time they need to make compromises in image quality, and this compromise does not necessarily damage the final imaging. For example, the reporter's small-sized pictures did not see the gap between RAW and JPEG. JPEG format obviously has some advantages in saving time. JPEG format pictures can meet the requirements of small size pictures as long as they are used properly.

How good quality do you want? This is the key to answer the question of RAW format.

18 canon consumer digital SLR camera is easy to run out of focus.

First of all, what is out of focus? Is there a tendency to enlarge the definition of "out of focus"? Thirdly, the comments of online forums have the characteristics of magnifying defects. At that time, when D70 first came out, the forum was full of "three major issues", as if D70 had been disabled. That's not true!

Canon cameras should be out of focus. But at present, no one has data about the odds of winning the lottery (including Canon). It's just that the buyer feels bad and anxious. I suggest buying licensed products boldly, explaining the situation with the merchants in advance, talking about the conditions, conducting simple on-site experiments or going home, and changing them if they can't. At most, it is the twists and turns of one more trip.

19. Digital machine Because of the focal length coefficient, a standard lens with a focal length of 50mm can be used as a portrait head of about 75 mm

Numerically, yes. However, considering the perspective effect, the 50mm lens will be deformed when approaching the task, and you still need to shoot a large bust properly. Taking a portrait on a digital computer still needs a special portrait head to complete. As for whether there is a boot position indoors, it is not the fault of the lens. Change the portrait head to a shorter focal length, pay no attention to the angle control of the plane, and wait for the perspective deformation.