Difference between SLR camera and digital camera and mobile phone

SLR cameras can replace lenses of different specifications, and all adopt single-lens reflection technology. Furthermore, the film is much larger than ordinary digital cameras, which directly leads to clearer pictures and more comfortable picture quality. Suitable for professional photographers to go out and shoot.

However, the new digital camera uses electronic liquid crystal to view the scene, which is different from SLR. Suitable for home, convenient and easy to carry when going out to play.

It's very convenient to take pictures on mobile phones, and many mobile phones have good pixels.

Extended data:

SLR cameras (SLR cameras) are also called SLR cameras. Refers to a camera that uses a single lens, through which light shines on the reflector and takes a view through reflection. The so-called "single lens" means that the photographic exposure light path and the framing light path * * * use one lens, unlike the paraxial camera or the double-reflex camera, the framing light path has an independent lens. "Reflection" means that a plane mirror in the camera separates the two light paths: when the mirror falls during framing, it reflects the light of the lens to the pentaprism and then to the framing window; When shooting, lift the reflector quickly, and the light can shine on the film or photosensitive element CMOS or CCD.

It only has one lens, which is used for taking pictures and framing, so the parallax problem is basically solved. When taking a view, the light emitted by the object is focused by the lens, reflected by the oblique mirror to form an image, and then reflected by the "roof prism" raised at the top. Photographers can observe the scene through the eyepiece, and it is the same image as the scene, which is convenient for framing and focusing. When shooting, the mirror will bounce up immediately, the lens aperture will automatically shrink to a predetermined value, and the shutter will open to make the film sensitive; After exposure, the shutter is closed and the aperture of the mirror and lens is reset at the same time.

Single-lens reflex cameras can be replaced by various wide-angle, medium-focus, telephoto or zoom lenses, and can also be equipped with close-up lenses, telescopic rings or telescopic leather cavities as needed. In short, any scene that can be seen clearly from the viewfinder can be photographed by the camera. A simple single-lens reflex camera using 120 film generally does not need a pentaprism (such as Great Wall DF-4) and can directly focus on the ground glass. Mid-to-high-end single-lens reflex cameras can also be replaced by overlooking viewfinders (such as Zhujiang S-20 1, Nikon F3), so they can also be used for low overhead or inverted viewing just like dual-lens reflex cameras. This is one of the reasons why the single-lens reflex camera gradually replaces the double-lens reflex camera.

Digital camera, English full name: Digital Still Camera (DSC), short name: Digital Camera (DC), short name of digital camera, also known as digital camera. Digital camera is a kind of camera that uses electronic sensors to convert optical images into electronic data. According to the use, it is divided into: SLR camera, micro camera, card camera, telephoto camera and household camera. The principle of digital camera recording images on film through silver bromide's chemical changes is different from that of ordinary cameras. The sensor of digital camera is photosensitive charge coupled device (CCD) or complementary metal oxide semiconductor (CMOS). Before an image is transmitted to a computer, it is usually stored in a digital storage device (usually using flash memory; Floppy disks and rewritable compact discs (CD-RW) are rarely used in digital camera equipment.

Digital camera is a product integrating optics, machinery and electronics. It integrates the conversion, storage and transmission of image information, and has the characteristics of digital access, interactive processing with computer and real-time shooting. Light enters the camera through a lens or lens group, and is converted into a digital signal through an imaging element of a digital camera, and the digital signal is stored in a storage device through an image operation chip. The imaging element of digital camera is CCD or CMOS, which is characterized in that when light passes through it, it can be converted into electrical signals according to different light. Digital cameras first appeared in America. More than 20 years ago, the United States used it to transmit photos to the ground via satellite. Later, digital photography was converted to civilian use, and its application scope continued to expand.

References:

Baidu Encyclopedia-Single lens reflex camera Baidu Encyclopedia-Digital camera