About SLR, side axis and Small DC

The quality of a single SLR is better than that of a small DC. This is nonsense to take a picture of a single SLR.
However, this is often not the case.
It's not just a simple analysis of the advantages and disadvantages of SLR.
It is self-evident that SLR is a concept. It is not a simple single machine, but a system. The SLR structure is only powerful so far. Its primary advantage is that it can support a powerful lens group. The second is the ability to take real-time scenes and intuitively predict the depth of field.
It is these characteristics that strongly attract every enthusiast and think of himself as a professional photographer. This should not be ironic but should be encouraged. In today's economic development, the price of single-camera is getting closer and closer to ordinary consumers, and no one is reluctant to have a camera with excellent image quality.
But SLR also has a lot of defects in the first and the day after tomorrow.
We may want to criticize SLR in terms of volume, vibration, speed, framing, and operation speed.
To put it bluntly, the SLR structure is actually a "last resort" design, and the cost of SLR advantages is huge. In order to achieve the reflection of the scene, the rear focal length of the short focal length lens (the distance from the rear lens to the film plane) and the mirror fight, so the wide-angle lens had to be designed with the structure of the reverse camera lens, in this way, the volume and weight of the lens are increased, but the precision is reduced. Rough statistics have been made in the literature: the lens size, diameter, and weight of a 135 camera with a single lens reflective structure are more than the average (larger) of a non-single lens reflective structure in various focal lengths) 30%-50%! Paying for these "extra" burdens is a huge amount of physical strength consumed by photographers!
The irony is that the birth and development of the 35MM SLR architecture has turned the 135 camera that was originally won by a small revolution into a huge pile of complicated monsters! If the volume of the camera is quantified by the ratio of the total volume of the fuselage, lens, accessories, and other devices to the negative area, the 120 SLR series, represented by hasoro polo, seems to be more "slim" than the 135 series! Today's APS and 4/3 digital SLR are even more bloated!
Let's look at the vibration of the SLR camera: What happened after we pressed the shutter? A series of mechanical actions taken by an electronic automatic single-camera (including digital slrs) as a photo are complex: including the zoom, focus of the motor drive, the overhead value provided by the processor based on the field light measurement, and the combined operation and execution of the overhead program, aperture from full open contraction to pre-selection value, mirror bounce, shutter open closed-this series of electronic and mechanical movements inevitably bring about vibration. (What's terrible is that there is an intolerable time lag !) Although the formula "minimum effective speed = reciprocal of lens focal length" is still popular to prevent vibration, this formula is often a theoretical formula and may not be suitable for different machines. This is also the relentless formula. In fact, in most cases except for Sunday, the camera may be shot with a long focal length in hand.
Shooting old birds have experience: If you want to keep the shutter from shaking, the ratio of the camera's weight to the lightness of the camera's shutter release operation is greater, the better, that is to say, the heavier the fuselage, the lighter the shutter, the higher the success rate of hand-held low-speed shutter shooting, the difference between different machines can even reach 4-5 shutter speed! The shooting of a Single-SLR camera can be said to be a "general mobilization. This problem is another scene in the side-axis camera: Taking Leica M-series cameras as an example, using a 50MM standard lens, experienced photographers can take sharp photos with a shutter speed of 1/4-1/8 seconds, because the Leica shutter is released and lightweight, while the all-metal compact body is steady and solid. Because the manual aperture is set before shooting and should not be moved, nothing else is moving on the whole machine! With relevant information: at present, many countries in the world still only allow Leica M-type cameras to take on-site interviews in theaters, churches, courts, hospitals and other occasions, and strictly prohibit the use of flashlights and any lamps. The reason is that the shutter sound of the Leica camera is negligible. As we all know, the last side of Premier Zhou Enlai was taken by a foreign reporter at a close distance at the conversation scene with a Leica camera. It only took advantage of the weak lights on the scene. Let's take a look at what our old saying is today, 30 years later. The tall and advanced SLR architecture is like a row of mortar sound and light. It's hard to figure out who is the main character and who is the supporting role!
About framing: Most people boast with great review about how the camera gets closer to reality. Is it true? In the eyes of experienced photographers, this is not exactly the case!
The first drawback of stand-alone camera framing is that we cannot see what is happening around the screen range, or what is going to happen, which is like holding us in a dark room, I only opened a window like a viewfinder and only saw the scene. It was so sad to see that only the camera was moved around or left or right! It's like a half blind man. Maybe there's a more beautiful mm coming, but you're missing! There are some unnecessary pictures on the perimeter of the effective lens of the Leica lens, so that the relationship between your photo and the scene is clear at a glance, and you can freely choose the best picture and shooting time, this is very important for experienced photographers!
The second drawback is that you can't see what you want to take at the moment of shutter action! Because the mirror must be able to work only when the shutter is played up, you cannot see the expressions and actions of objects while the shutter is on. This is the blind spot of Single-host. As long as there is a mirror, this problem exists. (We once had a fixed translucent mirror structure, because the technology is not mature and has not been developed) and this is exactly the strength of the side axis viewfinder!
The third drawback is that the brightness of the single-camera viewfinder is reduced by the aperture of the lens used, which is not comparable to that of the Shaft Grinder. The optical viewfinder of the Shaft Grinder can weaken the Light of the scene to be ignored. Therefore, in the case of dim light on the scene, the single lens player is much more difficult, regardless of auto focus and manual focus, and even seriously affects the visual observation.
The fourth drawback is that the auto-focus speed of a single reflector is actually not as high as that of manual focus. (it must be said that XD, which has only used auto-focus, will disagree with this statement) the auto focus speed depends on the computation of the processor and the running speed of the motor. Based on a large number of practical tests, there is no auto focus speed that can catch up with the manual focus speed of the human brain, when we took a photo in the single lens recorder, our eyes were always waiting for the machine to focus, in addition, in most cases, auto focus is "always busy" and there will be "too busy" misoperations. Each photo must be processed by a full set of actions on the processor. This is fine when the object distance remains the same, but if the object distance is greatly changed, or you need to select the target focus subjectively, then there is no manual speed. Even if the focus is fixed automatically, our brain has a slow response time to non-manual actions, and our eyes may not be "too late" to trust and confirm the focus. (This is why many new technologies have been derived, such as eye movement, focusing, and multi-point focusing) the most authoritative statistics so far. In most cases, in the hands of experienced photographers, or is it faster to focus on Leica baseline-based Ranging Based on the Principle of Kepler.
This does not mean that the auto-focus technology is already very mature. It is undeniable that the auto-focus success rate is very high in the case of a high-speed camera or an animation, the significance is to make photographers focus more on the composition. Moreover, auto focus is essential for a large number of non-professionals.
The response speed of Single-countermeasure: there is a general perception that SLR is the fastest. This is because it is much faster than the current Small DC. However, if you are playing from a variety of plastic machines, you will not emphasize this concept. According to scientific tests, the single-relay is 5-6 times slower than the response speed from the shutter to the completion of the exposure (either manually or automatically) due to the SLR structure, although our fingers do not seem to be able to feel this speed difference, we have actually slowed down the brain's shooting instructions.
For a digital SLR camera, I am afraid the most fatal defect is the size and weight. It doesn't mean that we don't care about our backs. More importantly, if the camera cannot be carried with us in our pockets, it will become a burden. The fact is that a very small number of people carry a photo bag every day, and the camera has entered the "standard for the masses" shopping age, there is no reason to ask everyone to go to work every day carrying a photo bag. I'm afraid no one wants to make a mobile phone call if you still need to carry an early brick.
The problem is that when photography becomes our daily life behavior, not just holiday commemorative photos or artistic creations, we have reason to put forward higher requirements for small-sized and high-quality digital cameras. In reality, most people who buy a digital SLR camera usually go to bed at home, with a low utilization rate. It doesn't mean that we don't have photography consciousness. It's really inconvenient. We have to go to work every day to pick up our children. It's impossible to carry our camera bags all the time. It's no different from crazy people. Not to mention the recording of meaningful shot captures at any time. 35MM the success of the tape machine is that even a pocket machine of the smoke box can produce negatives of the same quality as the cannon. From this point of view, digital cameras are much worse. Although the image quality of a Small DC is not comparable to that of a single SLR, the Small DC just makes up for the shortcomings of a single anti-camera. It is more convenient and convenient, regardless of the volume, distance, and remote camera. Although the image quality of a Small DC is significantly different from that of a single anti-bot, its advantage is that the single anti-bot cannot be replaced.
Those who put too much emphasis on single-camera quality should not forget that the machines in your hands may not be able to take photos of photographers. In turn, if you are an experienced photographer, you can't take a photo that most people can't, even if you use a small DC, it will not prevent you from winning the grand prize. Because the advantages and disadvantages of a photo are determined by the content.
Those who put too much emphasis on the quality of stand-alone cameras should not forget that the entry-level SLR digital server in your hands is actually far from the real requirement of "creation. It is not even as good as a eight hundred yuan film SLR. If you are really addicted to photography research, don't take over the outdated tablet at home. It will make you get twice the result with half the effort.
Those who put too much emphasis on the quality of stand-alone cameras should not forget that the current technical status of SLR digital devices is still in a few years, and greater changes are coming soon. The current structure of the digital SLR architecture is very embarrassing, the pattern of the film set of 135 machines does not have any fundamental improvement in the photosensitive body technology and frame. Now, you do not have to carefully abide by the single choice of SLR. For example, the side-axis APS model has begun to show light. High-quality digital cameras that are more suitable for digital technology features and are small and convenient to carry must be the future direction of development, and the development speed is faster than we expected.
When we admire professional photographers with a set of SLR devices and mighty lens sets, you may be aware that the bags of experienced photographers, except for long and short cannons, there is often a small, battery-free Leica M6 OR M3 that can work in the Antarctic Arctic desert battlefield.

If you are a very experienced photographer, you will choose equipment based on the purpose.
If you are a very experienced photographer, you will calmly treat the camera's automatic functions and you will know which automatic functions are useful to you, what functions are used to deal with real "Dummies"-those who have never studied professional photography.
If you are an experienced photographer, the most reliable automatic function is your own eyes and hands.

In Shanghai, a photo and equipment manager said to me: if you carry a Leica M6, people may think you are a nouveau riche, but if you have a Leica m3 around your neck, knowledgeable people will respect you a bit and know that you may be a photographer.
One of my friends, a famous photographer, told me another sentence: If you want to be a photographer, the minimum investment is to buy a Leica camera. If you are honest and practical, you can climb to the peak.
These two questions are not without reason.

After writing this nonsense article, do not mistakenly think that I am a one-sided devalued digital SLR, or that I am a Leica fan, or that I am not selling Leica, the Leica example is because it is representative and opposite. It is also thinking about the development direction of the ideal digital machine.
In addition, by the way, the Japanese, while manufacturing a large number of digital cameras and dumping countries, are recycling all models of old Leica cameras as never before, according to statistics, at present, 80% of Leica cameras are acquired by Japanese people and are concentrated in the camera industry. The bosses and engineers of major camera manufacturers are all fans of Leica, all of them are lucky to use the German Leica. The Japanese camera industry has always admired the quality of German cameras, so it is only today that Japanese cameras dominate the world. Think carefully. Should we be awake? Don't blame me!