What is the function of the coating on the photographic lens? (I bought a new camera lens and just want to know about it) Please, 3Q.

coated lens is a new technology that uses optical film and vacuum to coat a layer of substance on the lens surface, so as to improve the ability of the lens to reflect light and enhance or reduce the light transmission. Anti-reflection lens for camera. The lens is plated with magnesium fluoride, silicon dioxide, aluminum fluoride, etc., which can reduce the specular reflection and improve the transmittance of the lens. Beautiful appearance, conducive to photography. The lens can also withstand all kinds of adverse environments, and it will not fall off when it is immersed in high temperature, rain or seawater, which has a protective effect. The purpose of coating is to increase the light transmittance of the lens, reduce the reflection of light between the lenses, and finally improve the overall imaging quality of the lens. The protective effect of coating is poor, so don't expect anti-hanging coating to play much role, especially the current "plastic" lenses are very arrogant. How to maintain a digital camera? It is a bad habit to leave spare batteries at home or lock them in the car. Many photographers bought key chain clips, put memory cards in them, and then tied them to the camera belt. A digital camera can take pictures with film and a fully charged battery, but in addition, it needs maintenance, and there are various forms of maintenance. Put the camera in the bag. First of all, you need a strong and easy-to-use camera bag to hold the camera, digital memory card and battery kit, and even more extravagant, you need an auxiliary lens or a small portable tripod. Leading manufacturers of camera bags such as Tamrac, Lowepro and Domke use high-quality raw materials, better shock protection and excellent straps and metal hardware. These devices have been reduced in size and are more suitable for placing digital cameras. If you want to buy a new camera bag, you'd better find a bigger one. If you buy a camera bag, you have to take out everything in it every time you take something, then you won't like it, because it will miss many good shooting opportunities and be annoying. When buying a photo bag, it is best to take the camera and accessories with you and see which photo bag is best for you. How to carry a satchel is also very particular. Adjust the strap on the camera bag, and don't make the camera too far away from your body, or it will bounce off your body, bump into others or other objects. Ideally, the camera bag should be hung a little higher, so that your arm can be protected from collision and thieves. At the same time, it should be noted that the lens facing inward (towards your body) can also play a protective role when carrying the camera. Stains on the lens of the camera will seriously reduce the image quality, appear spots or weaken the image contrast. It is inevitable that your fingers touch the lens, and dust and gravel will also fall on the optical device. This is why we need to clean the camera. Cleaning tools are very simple: lens paper or fine tools with fiber cloth, lens brush and cleaning kit. Never use cardboard, paper towels or napkins to clean the lens. These products all contain scratching wood pulp, which will seriously damage the fragile coating on the camera lens. When the cleaning paper is not used, put the microfiber cleaning cloth in the original container to keep it clean. Microfiber cloth is very washable and can be washed with clothes regularly. Try not to use cotton T-shirts or other fibers, because coarse gravel may seep in. If you use a brush to clean the dust and debris on the lens, don't touch the hair on the brush with your hands or fingers. The oil on your skin will infect the hair and then stick to the lens. Another way to clean the dust on the lens is to use the lens frequently. If your camera has a lens cover, you can fix it to the camera body with a belt, rubber band or "lens fixing" device. Hot and cold weather can also affect the camera. If the camera was originally in an air-conditioned room and then immediately placed in a hot and humid environment, fog spots would appear on the lens and viewfinder. At this time, it needs to be cleaned with suitable tissue paper or cloth. If you bring your camera into the room from the cold and dry outdoor, you'd better put it in your bag to warm it up first, and then take it out and put it in the house. And be careful with the camera to see if it is "sweating". If it is sweating, take immediate action. A suggestion from a professional photographer is very simple, and you may not believe it: take a plastic zipper lock bag with you. In very humid or dusty climate, you can dig a small hole on the side just enough to put the camera lens and put the camera in a bag to prevent fog, moisture and dust from entering the camera, which will prolong its service life. Finally, don't put the camera in the back seat of a car with high humidity. The interior of the car is like a stove, which will deform the plastic and damage the wires. Many manufacturers will suggest that if you don't use the camera for two weeks or more, you'd better take it out, because the battery will leak and rot, sometimes affecting the circuit connection, making the camera unable to work normally. I hope I can help you ~