The difference between SLR camera and digital camera and the basic knowledge of photography (how to choose a camera for beginners)

Different focal lengths, different prices.

1. Different focal lengths

The actual focal length of SLR is larger than that of ordinary digital camera, that is to say, the same focal length of 135 is equivalent to 50mm, the actual focal length of full 135 digital is 50, and the actual focal length of APS frame machine is about 35.

General digital cameras are about 10mm, which makes the depth of field of SLR smaller than that of ordinary digital cameras. SLR is more likely to send photos with clear foreground, blurred or clear background and clear foreground.

2. The price is different.

Because the price of SLR is more expensive and the image processing chip used is more powerful, the machine reflection of SLR is much faster than that of ordinary digital cameras. Even now, there is still a certain gap between ordinary digital cameras and SLR.

Imaging principle

It can be seen from the structural diagram of the single-lens reflex camera that the light reaches the reflector through the lens and is reflected to the focusing screen above to form an image. Through the eyepiece and pentaprism, we can see the scenery outside in the observation window. The light passes through the lens and is reflected by the reflector to the screen of the frosted viewfinder. Through the convex lens and reflected in the pentaprism, the final image appears in the viewfinder. When the shutter is pressed, the mirror moves in the direction indicated by the arrow, and the mirror is lifted to take an image on CCD or CMOS, which is consistent with what is seen on the viewfinder screen.

single lens

Sony FEPZ28- 135mm F4 G OSS Quan Huafu electric zoom micro single lens.

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Digital cameras, including SLR cameras, have different imaging structures and different framing methods, which leads to great differences between digital cameras and SLR cameras.

1. Digital cameras are a general term, including SLR cameras and card cameras.

When we go to buy a camera, the salesperson will ask us if we want to buy a digital camera. Gee, Tangdian sells SLR cameras? Is there only a digital camera? No, actually, digital camera is a general term. Digital cameras actually include ordinary digital cameras, SLR cameras, micro-cameras and even card machines; When we buy a camera, we need to consider our own shooting needs. It is more economical to choose high-end SLR cameras or ordinary digital cameras, otherwise we will be silly. T know what to buy! You know, SLR cameras are very different from ordinary digital cameras.

Second, the traditional digital camera is mainly based on electronic calculation, and the SLR camera is mainly based on optical shooting.

Traditional digital cameras are those big screens and lenses that cannot be replaced. This camera mainly uses electronic computing imaging, which leads to limited shooting clarity. SLR cameras are different. SLR cameras mainly use optical shooting, and a single lens reflects light to obtain scenery. Although the pixels are not as big as ordinary digital cameras, the imaging effect is strong enough. SLR cameras have not been replaced by ordinary digital cameras and camera phones because of their excellent imaging. And always above the lens; To know that SLR cameras are even better than micro cameras, people who really like shooting should choose SLR cameras.

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