How many models of cameras does Sony a7 have? What is the difference?

Sony A7 camera * * * has five models, namely A7, A7II, A7s, A7r and A7RIII.

The main differences between these five models are as follows:

First, the pixels are different.

Although the photosensitive devices used are all Quan Huafu, the specifications and pixels are different: A7 is 24.3 million pixels; A7II is 24.3 million pixels; A7s is12.2 million pixels; A7r is 36.4 million pixels; The latest A7rII is 42.4 million pixels. Except A7, they are all back-illuminated CMOS.

Second, anti-shake technology is different.

With or without five-axis anti-shake technology (these machines have lens anti-shake function with or without anti-shake technology). A7: failed, A7II: passed, A7s: failed, A7r: failed, A7rII: passed.

Third, the photosensitive range is different.

ISO sensitivity ranges are different. Among them, A7s has a low number of pixels, but a large photosensitive dynamic range, ISO 100- 102400. The latest A7rII has reached the highest ISO 102400. The rest are within the scope of ISO 100-25600 or 5 1200.

Fourthly, the number of focus phase detection points is different.

Sony A7rII has 399 phase detection points, while other models only have 1 17.

Fifth, the quality of video shooting is different.

Among them, A7II, A7s and A7rII can shoot 4K video in XAVCs format.

Extended data

The main advantages of A7 series microchip are as follows:

1, Quan Huafu has a low entry barrier. Thanks to the extremely low cost of Sony's own 28-70mm F3.5-5.6 lens, the first generation A7 kit on sale only costs 6800 yuan, which is very obvious compared with the other two entry-level products, namely Nikon d 6 10900 yuan Nikon kit and Canon 6D kit 13300 yuan.

2. Advantages of Quan Huafu sensor. In the photography circle, it can be said that the size of the frame is king, and the advantages of the frame are even difficult to be offset by technological progress, especially the high sensitivity and tolerance of the camera. Quan Huafu equipment can be said to be the equipment for crushing residual images, not to mention the small sensor equipment such as 4/3 inch system and 1 inch system. Sony has long customized CMOS sensors for Nikon and other manufacturers, and the technology is also guaranteed.

3. Convenience of 3.WiFi and NFC connection. Since the first generation A7, Sony has provided the functions of WiFi connection and NFC matching, which is very convenient in photo sharing.

4. The great advantages of the weight and size of the fuselage. Compared with the traditional Quan Huafu SLR, nearly half of its advantages can be said to be that it greatly reduces the travel burden, and is relatively small and easy to carry.

5. Technical advantages of electronic viewfinder. The electronic viewfinder used in micro-single truly realizes what you see is what you get. It is very convenient to adjust the exposure time and aperture, and you can see the effect directly, which is conducive to beginners.

6. Advantages of focusing system. Some people think that A7 series focusing is a disadvantage. Compared with the traditional SLR at the same price, A7 still has certain advantages in focusing mode, especially in the number of focusing points and coverage area. Although there is a certain gap in focusing performance, it is enough for ordinary users.

Refer to Baidu Encyclopedia-Sony A7

Refer to Baidu Encyclopedia-Sony A7 ii