There were no Sony cameras in the film era, but Sony was the first manufacturer to set foot in digital cameras, and cooperated with Kodak to develop mass-produced digital cameras in the 90s. In 2006, Sony acquired the camera giant Minolta and began to manufacture professional SLRs, but unfortunately the share of the SLR market has long been firmly occupied by Canon and Nikon. In 2010, Sony broke his wrist and gave up the newly formed SLR product line, and instead released its first mirrorless camera NEX, named "Mirrorless". By removing the reflector and pentaprism from the DSLR, the camera is the size of the palm of your hand, but it has the same image quality as the DSLR. Although "mirrorless" is a proprietary trademark registered by Sony, it has long been synonymous with mirrorless cameras.
 
Image Sensor:
 
The most important component in a camera is the image sensor CMOS, which directly determines the image quality of the camera. Sony occupies half of the global market in the field of sensors, and most of its camera peers, including Nikon and Fujifilm, are provided by Sony for the sensors in the camera. DXOmark scores the image quality of major cameras, with the exception of two medium-format cameras, and the rest of the top 10 cameras are dominated by Sony mirrorless and Nikon DSLRs, which also rely on sensors from Sony.
 
Spend the same price on the market to buy a camera body,Sony can provide the best level of image quality,Netizens ridiculed"It's not the mind that is wider than the sea,But the tolerance of Sony cameras",High sensitivity performance and tolerance are the strengths of Sony sensors。 The Sony sensor also integrates a hybrid focusing unit that combines phase focus and contrast focus, and achieves first-class level in focusing speed and accuracy. Sony mirrorless cameras come with an "eye control" function that allows you to accurately focus on the human eye with one click, which is very useful when shooting portraits.
 
In addition to the absolute advantage in the sensor manufacturing process, Sony cameras also have an advantage in size. Sony's product line can be roughly divided into two series, one is the A5000 and A6000 series with APS-C format sensors, and the other is the A7 and A9 series with full-frame sensors.
 
APS-C format series
 
A5000 series is positioned in the mainstream consumer market, small size, a variety of colors to choose from, the body has a touch screen that can be folded 180 degrees, easy to take selfies, touch-based control is very suitable for novice users, as long as you can take pictures with your mobile phone, you can basically get started quickly. The price of the A5100 body is about 2200 yuan, and the matching lens does not exceed 3000 yuan.
 
The A6000 series also uses the APS-C format sensor, and the image quality level is similar to that of the A5000 series, but the A6000 series is positioned as a quasi-professional grade, with fast focus continuous shooting, more dial buttons on the body, rich customization options, and an EVF electronic viewfinder on the body. At present, there are A6000, A6300, A6500 three fuselages on sale, the latter is an iteration of the former, the price is between 3000-7500 yuan.
 
Full-frame series
 
In 2013, Sony released the world's first full-frame mirrorless camera, the A7, which was an epoch-making product that announced the entry of mirrorless cameras into the professional field. Prior to this, a symbol of professional full-frame cameras has never been so light and portable, and the price of full-frame cameras has also been lowered to less than 10,000 yuan. The A7 series is divided into three sub-series: A7M, A7R, and A7S, with completely different product positioning and functional division. After several years of iteration, the A7 series has produced a total of 8 products in three generations of models, with prices ranging from 5,000 to 19,000 yuan.
 
In 2017, Sony released the flagship speed machine A9, which no longer emphasizes portability, but a professional-grade mirrorless camera that can fully compete with the flagship SLR in all aspects of performance. It features a 24-megapixel stacked sensor that delivers 20 times faster read speeds than back-illuminated sensors, and a top-of-the-line focusing system that delivers high-speed continuous shooting at 20 frames per second in focus mode, benchmarking against flagship DSLR cameras like the Canon 1DX and Nikon D5. Compared with the above-mentioned SLR, A9The viewfinder can work normally during continuous shooting, without flicker, and the shutter is completely silent, and the focus is more accurate, which is actually the most significant advantage of the mirrorless camera over the SLR camera, and its price of about 25000 yuan is also much lower than the above two flagship SLRs.
 
Lens group
 
After eight years, Sony has built a huge group of mirrorless lenses from scratch. APS-C format cameras use E-mount lenses, and there are nearly 20 lenses to choose from, which is relatively inexpensive; Full-frame cameras use FE mount lenses, there are nearly 30 lenses to choose from, lenses with Zeiss or G logos will have higher optical quality, since the E mount and FE mount mounts are exactly the same, the two lenses can be mounted normally, but it is not recommended to mix and match them like this. As the No. 1 mirrorless brand, Sony also has a relatively richer choice of sub-factory lenses, and the ultra-short flange distance of mirrorless cameras can also be transferred to various old DSLR or rangefinder lenses.
 
Many manufacturers have launched full-frame systems in 2018, and Sony's full-frame system has gone through several years, and the accumulation of high-quality lenses is the biggest advantage of Sony's mirrorless system. The body design can have a late-mover advantage, but it will take a long time to develop a complete set of lens groups from scratch, and it is a last resort to transfer DSLR lenses through the adapter ring. Due to the rapid iteration of Sony cameras, their bodies are relatively inexpensive compared to competitors of the same image quality or specifications. However, it should be reminded that it is easy to get started with full-frame, but the cost of subsequent lenses is not a small amount, and do not choose full-frame mirrorless because of its small size, you must know that mirrorless lenses with the same aperture and focal length can not be superior to SLR lenses at all.
 
    ※What are the upgrades for the third generation of the A6000 series?
 
    The three cameras have strong focusing and focus tracking performance, and all support high-speed continuous shooting at 11 frames per second in the focus tracking state, which is capable of shooting high-speed moving sports scenes or capturing active children. If you just take pictures, the A6000 is enough, and the main difference between the A6300 and the A6000 is the addition of 4K video recording. Compared with the A6300, the A6500 has added 5-axis image stabilization, and its 4K video shooting capabilities are also on a higher level.
 
    When taking pictures, the APS-C format always suffers when comparing with full-frame cameras, so it is called half frame or residual frame, but for video shooting, the APS-C format itself is a Super35mm format commonly used in cinema cameras, which can bring a cinematic perspective. A6500 has become the video camera of choice for many video bloggers, through 6K supersampling synthesis of 4K picture, video clarity is in the first echelon of cameras, and the price is also very attractive in video cameras.
 
    *What is the difference between the three sub-series and 8 products of the A7?
 
    The A7M series emphasizes comprehensive performance, with a 24-million-pixel sensor, the best focusing performance and continuous shooting speed among the three, and the lowest price. The A7R series focuses on high image quality, of which the A7R2 and A7R3 both use 42.4 million pixel back-illuminated low-pass filter sensors, which are meticulous and top-notch. A7S focuses on video shooting, using a 12 million pixel sensor, sacrificing pixels in exchange for shocking high-sensitivity performance, ISO can reach an astonishing 400,000, comparable to night vision devices.
 
    The A7 and A7R, released in 2013, have brought a huge impact as the first full-frame test products, but there are still many unsatisfactory points, such as the messy layout of the buttons, the operation is not smooth enough, and the battery life and response speed are relatively average. But compared with Canon's toothpaste-style upgrade, Sony's product replacement can be described as vigorous.
 
    In 2015, the second generation A7 was released, and the whole series added a five-axis anti-shake function, which can increase the exposure time by 4.5 stops, and the button layout has been adjusted, which is not as awkward as the original A7. The most obvious improvement is A7R2,Compared with the first generationA7R in image quality、Shutter、Focus have completed a qualitative leap,Can shoot4K video,It can be described as a generation of god machine,It is still Sony's hot-selling camera,The body performance is still outstanding,The price is about 10000 yuan,It can meet all the needs of most photography enthusiasts for cameras。
 
    Sony cameras have always been of the highest quality quality, but in the past, few professional photographers used Sony to work, and the reason for this was that the handling and reliability were not as good as those of the SLR. In 2017, the third-generation model was released, Sony rarely did not make a fuss about the sensor, and the picture quality naturally did not improve significantly, mainly in other parts of the fuselage: the fuselage added a touch screen and a focus lever, and the control level rose to a new level; The battery with twice the capacity has been replaced, and the battery life is finally comparable to that of the SLR; The focus system has been completely replaced, the five-axis image stabilization has been improved to the top level of 5.5 stops, and the dual card slot design has been greatly improved, and the video shooting performance has also been significantly improved, supporting HDR video shooting, and more and more professional photographers are starting to use the 3rd generation A7. A7R3 is priced at 19,000 yuan, and A7M3 is priced at 14,000 yuan. Among them, the A7M3 was selected as the 2018 Product of the Year and the Best Mid-range Interchangeable Lens Camera by Dpreview, a professional review media.
 
    Compared with the star-level A7M and A7R, Sony's A7S is relatively niche, and the price is also the highest, focusing on video shooting, which can record all-pixel 4K video with the whole sensor, but the recording ability of 4K-30P is not uncommon today. A7SShe current only updated to the second generation,In addition to the advantage of full frame,The overall performance is not as good as PanasonicGH5,Failed to become a first-line video machine,Full-frame120000000 pixel sensorAlthough the high sensitivity is good,But the pixels are too low,The photo performance is average,I can only expect the release of the third-generation model to turn the situation around。