What is a DSLR camera

Summary: What does DSLR mean? What is a single-lens reflex camera? Single Lens Reflex Camera, (SingleLensReflexCamera, abbreviated as SLRcamera) is also known as SLR camera. It is a camera that uses a single lens, and the light shines through this lens to the reflector, and the view is taken by reflection.

What does DSLR meanWhat is a DSLR CameraCameraWhat does DSLR mean

What does DSLR mean

Single Lens Reflex Camera, (SingleLensReflexCamera, abbreviated SLRcamera) also known as a single-lens reflex (SLR) camera. It is a camera that uses a single lens, and the light shines through this lens to the reflector, and the view is taken by reflection.

The so-called single-lens refers to the photographic exposure light path and framing light path **** with a single lens, unlike side axis cameras or dual-lens reflex cameras that have a separate lens for the framing light path. Reflection is a piece of flat reflector in the camera to separate the two light paths: when framing the reflector falls, the light from the lens is reflected to the pentaprism, and then to the viewfinder window; when shooting the reflector is raised quickly, the light can be irradiated to the film or the sensor CMOS or CCD.

Single-lens reflex (SLR) lens imaging principle

In this system, the unique design of the reflector and prism allows the photographer to observe the image passing through the lens directly from the viewfinder.

Single-lens reflex cameras can be seen in the construction of the diagram, the light through the lens to the reflector, reflected to the focusing screen above and conjugate the image, through the eyepiece and pentaprism, we can see in the viewfinder window to see the outside scene. Light passes through the lens and is reflected by the reflector into the frosted viewfinder screen. Passing through a convex lens and reflected in the pentaprism, the final image appears in the viewfinder frame. When the shutter is pressed and the reflector is moved in the direction indicated by the arrow, the reflector is raised and the image is captured on the CCD as seen on the viewfinder screen.

The advantage of a DSLR over a side-axis camera is that what you see is what you get, and the angle of the image in the viewfinder is the same as the angle of the final film. However, compared with the side axis camera, SLR camera lens back focus to be able to simultaneously in the position of the reflector and the focal plane of the sensor position at the same time imaging, it must be in the imaging focal plane before also produce a false focus, which caused the SLR camera optical lens structure is more complex, the volume is larger, and at the same time, the imaging effect is not as direct as the side axis camera, translucent. At the same time the volume of the reflector to do the thick and bulky.

Advantages of DSLR Digital Cameras

1. More Accurate Framing

The unique design of the DSLR's reflector and prism makes it possible for the photographer to observe the image passing through the lens directly from the viewfinder. As a result, the image the photographer sees is identical to the image that is captured.

Ordinary digital cameras can only see the captured image through the LCD screen or electronic viewfinder (EVF), which is different and not identical to the image captured by the shooting lens.

2. Higher image quality

The image sensor (CCD or CMOS) is one of the most important core components of a digital camera, and its size is directly related to the effect of the shooting, the larger it is, the higher the quality of the image, and the size of the image sensor of a digital SLR camera is much larger than that of an ordinary digital camera. Therefore, the sensor pixel number of DSLR is not only higher (at present, the minimum 6 million), but also the area of individual pixel is four or five times of the civilian digital camera, so it has excellent signal-to-noise ratio, and it can record a wide range of brightness. 6 megapixel DSLR camera's image quality is definitely more than that of the 8 megapixel ordinary digital camera which adopts a 2/3-inch CCD.

3. Abundant Lens Options

Ordinary digital cameras have only one pre-fixed lens on the body, which is not replaceable, and the range of focal lengths and apertures of lenses for each camera model is very limited, making it difficult to realize a single camera for the whole world.

While the lens of a DSLR digital camera can be replaced at will (as long as the bayonet matches), Canon, Nikon and other brands have a huge group of autofocus lenses, ranging from ultra-wide-angle to ultra-telephoto, and from macro to soft-focus, the user can choose the matching lenses according to their own needs and preferences. Not only can you use the original, but you can also use lenses from professional lens manufacturers such as Tenglong and Sigma.

DSLR camera enthusiasts are very obsessed with lenses, they each have a stash of several or even a dozen lenses spare, out shooting with a bag can take several lenses, shooting landscapes with wide-angle, shooting flowers and plants for macro, shooting wildlife on the telephoto change ......

4. Excellent hand-control ability

Ordinary digital cameras are mostly based on automatic shooting, manual adjustment of parameters is very limited, but when shooting due to the environment, the situation of the subject is ever-changing, only the use of the automatic mode of shooting is very difficult to adapt to the shooting of the actual needs of the, not to mention that many skillful color friends like to manually set their own shooting parameters to create a unique photographic works. The colorists like to set the shooting parameters manually to create their own unique photography. This is a very important part of the process, but it's also a very important part of the process.

DSLR digital cameras have a very powerful manual adjustment capability, whether it is the aperture size, shutter speed, exposure, iso size, metering mode can be adjusted at will, it is easier to achieve the best shooting results. Therefore, the manual adjustment function has become a must-have function of digital SLR, which is also the representative of its professionalism. Fast response time.

5. Rich accessories

An important difference between a digital SLR and an ordinary digital camera is that it has a strong scalability, in addition to the ability to continue to use additional lenses such as polarizers and interchangeable lenses, you can also use a professional flash, as well as other auxiliary equipment to enhance its ability to adapt to various environments. For example, high-power flash, ring macro flash, battery grip, timing remote control, these rich accessories allow digital SLR can adapt to a variety of unique needs, while the ordinary digital camera is greatly inferior.

Drawbacks of DSLR cameras

1. Expensive

DSLR digital cameras are much more expensive than ordinary digital cameras, now the lowest-end entry set of at least three or four thousand dollars, the general general 7,000 or 8,000, high-end models can easily be tens of thousands of dollars or even tens of thousands of dollars.

2. Larger, inconvenient to carry

SLR machine in order to do easy to manipulate, most of the functions are made into buttons on the body, so it is unlikely to be made like a normal card machine as the size of the volume is relatively large, poor portability, generally buy a DSLR machine, we need to be equipped with a special camera bag to load, the bag is generally not too small, because there are many accessories it! !

3. Control is more complex

Most of the ordinary digital cameras do not have any manual function, are fully automatic shooting, shooting parameters set automatically by the camera, you just choose a good scene, a press the shutter on it. Although the SLR digital camera also has automatic shooting function, generally who do not use, because it provides a very powerful manual function, photographers like to manually set up their own parameters to take pictures, take a picture to set aperture, shutter, ISO, white balance, metering and other parameters, not familiar with the manual function of the friends is very difficult to use it to take good pictures.

4. Post-investment

Ordinary digital camera is a one-time investment, after buying the camera basically do not have to spend any money. But for DSLR digital cameras, after buying the body that is only the beginning, you also need to spend money to match a variety of lenses ----- play DSLR is to play the lens! A lens, cheap one or two thousand thousand dollars, expensive tens of thousands of dollars, and play the SLR rarely only with a lens, launched the fever are more and more to buy.