Dash Cams: The Secret of the Lens
The lens is the eye of the recorder, and a good lens directly determines the quality of the image. At present, most of the driving recorders on the market use three types of lenses: all-glass lenses, resin lenses and glass-resin hybrid lenses.
1. What kind of dash camera lens should we choose?
A 4G lens or a 6G lens is a 4-layer full glass or 6-layer full glass, and a 2G2P lens is a two-glass and two-tree lens. With a resin lens, after half a month of exposure, the quality of the shot will be affected.
With a lens made of all glass, it also has a good shooting effect at night. And the glass lens is not easily deformed under high temperature and low temperature, and has stronger adaptability and higher security. All glass lenses are better than resin lenses.
Generally speaking, the more layers a lens has, the better the optical performance. At present, the main popular dash cam lenses have gradually adopted four to six-layer lens structure.
Many people who say they are 1080P products are actually stealing the concept. For example, they will change the width to 1440 (two 720 pieces stitched together), but the height is still 1080P, and then say 1080P to the outside world.
2. The clarity of the dash camera lens
In addition, when some car owners buy a recorder, they think it is a high-definition product when they see the clear display. In fact, the clarity of the screen can be debugged through software, and this type of product is not 1080P.
So how to distinguish the real 1080P products? True 1080P must have a resolution of 1920×1080. A product with 2 million pixels is not necessarily a high-definition product if it is not displayed as 1080P.
To identify whether it is a true 1080P product, it is best to compare it on a high-definition computer monitor, and the effect will be obvious.
Car owners often ask this question, thinking that a product with a fisheye effect must be an ultra-wide-angle lens. In fact, this fisheye effect can be achieved by adding a layer of convex lens to the lens, rather than the wide angle of the lens itself.
The plane lens must be less than 140 degrees, and the spherical lens can reach 158-170 degrees. In addition, the lens with coating technology can increase the quality of light transmission.
The quality of the dash camera lens will affect the imaging effect. If the light transmittance of the lens is good, the light will not be lost a lot. However, if the lens is not clear, it does not necessarily depend on the number of pixels of the lens, as long as it is a high-definition lens.
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