Lens-related knowledge popularization

The lens has two fingers in the film and television, one refers to the optical components used by the movie camera and the projector to generate the image, and the other refers to a continuous frame taken from the start to the shutdown, or the clip between the two cut points, also called Lens.
There are many types of photographic lenses, and the classification methods are different. According to their uses and structural characteristics, they are divided into ordinary photography lenses, folding lenses, fisheye lenses, macro lenses, zoom lenses, and special lenses.In ordinary photography lenses, they are divided into standard lenses, medium focal length lenses, and photography. There are many types of telephoto lens, super telephoto lens, wide angle lens and super wide angle lens.
Lenses are generally classified according to focal length:
Fisheye lens; macro lens; wide-angle lens; standard lens; telephoto lens; super telephoto lens; zoom lens, etc.
Fisheye lens: 180 degree angle of view, large distortion, special purpose
Macro lens: Shoot small objects at close range, such as small ants, etc.
Wide-angle lens: shooting landscapes and large scenes with infinite focal length
Standard lens: It can be used for shooting landscapes and people, between wide angle and telephoto
Telephoto lens: Take close-up shots of distant people and distant objects, such as sports games
Super telephoto lens: can shoot the moon and stars
Zoom lens: a lens whose focal length can be changed according to the subject
According to the origin of the lens, they are mainly Japanese lenses and German lenses. The Japanese lens is mainly good in color reproduction, and the German lens has a strong sense of layering. In the market, Chinese lenses are gradually occupying a certain market, mainly because the prices are relatively low.

Motion Sensor Light

[Automatic Switch, Free Your Hands]: Cabinet light has two working modes, Motion & Light Sensor Mode, Always On and Off Mode. In G mode, this counter light automatically turns on when it senses human motion within 10 feet in a dark environment, and automatically turns off after 20 seconds of inactivity. You can use these lights as normal light or safe light.
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[Larger Battery Capacity & Rechargeable]: Built-in 1000 mAh high-capacity rechargeable battery, has larger battery capacity than other led cabinet lighting, easily to charged via USB. After fully charged, these closet lights last for up to 8 hours under on mode and last 1-2 months under motion sensor mode. NEVER replace AAA batteries frequently. Energy Save & Save More Money!
[Two Ways to Install]: Easy to install and remove without any other tools. Using Magnetic Back Design, can stick on any ironwork, allows you to change the its location you need. Or you can use the included tape to attach the iron to any non-ferrous product surface. When you need to charge or change position, you can take down the closet lights at any time.

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