What's the difference between Quan Huafu and Medium Format in photography? What is the difference?

First of all, we must understand the meaning of frame, which is a concept introduced from the era of film cameras. Frame refers to the size of the film. The original film size of 135 camera is 24X36mm, so when it is used in the digital age, the photosensitive element (CCD or CMOS) is equivalent to this size, which is called Quan Huafu. The larger the photosensitive element, the better the image quality.

Digital cameras can be divided into medium format, SLR, single camera (Sony calls it micro-single camera), paraxial camera, SLR-like camera, card and so on.

1. medium format camera, advanced professional machine, and the size of photosensitive element is larger than that of Quan Huafu. This kind is more professional and expensive. Representative brands include Hasselblad, Freescale and Pantex. Pantex 645D photosensitive element is 44X33mm in size.

2. Single-lens reflex SLR camera, commonly known as SLR. It can be divided into (1) Quan Huafu, and the photosensitive element is about 24X36mm, which belongs to professional machines, and the representative brands are Canon, Nikon and Sony; ⑵APS-H, the photosensitive element is 27.9 x18.6 mm. This machine is also a professional machine, and the representative brand is Canon, which is not used by other manufacturers. (3) APS-C, the photosensitive element is about 23.6X 15.6mm, which is divided into quasi-professional machines and entry machines, and the representative brands are Canon, Nikon and Sony. (4) 4/3, the photosensitive element is17.8x14.3mm. The representative brands are Olympus and Panasonic.

3. Single camera, Sony is called micro single camera. It is a camera with replaceable lens, without mirror system or with fixed mirror system. The frame is in APS-C format, representing the brand Sony. The frame has 4/3 frames, and the representative brands are Olympus and Panasonic; At present, neither Canon nor Nikon has produced such a machine. This kind of standby machine can be used as a professional machine.

4. Paraxial camera, camera with optical viewfinder system, there is a certain parallax between what the viewfinder sees and the actually shot picture, and the picture quality is good. The photosensitive element is about11.6 inch, 8X6mm. There are also smaller ones. Better can be used as a backup machine for professional machines. Most manufacturers have products. From this beginning, they can all be classified as consumer cameras.

5. A camera similar to a SLR looks like a SLR, with or without a mirror system and an electronic viewfinder. Its control is similar to that of a SLR, but the lens cannot be replaced. The photosensitive element is less than11.6 inch, and the focal length is generally long. At present, the biggest zoom is 36 times. Representative brands include Fuji and so on.

6. The most popular card machines in consumer-grade machines have photosensitive elements of11.6 inches and below, most of which are below 1/2 and 6.4X4.8mm, and basically have no manual function, but in order to suit novices, they are all equipped with scene mode, face recognition and smiling face mode to improve the shooting success rate.