What brand of cleaning clothes should I use for SLR? Will the lens be damaged by water? Will installing a UV mirror affect shooting? How often is it better to clean the lens?

1, cleaning clothes have little difference. In fact, it is more used to blow balloons. Others, such as lens paper, cleaning liquid, jelly pen, etc. Use as little as possible if you can.

2, lens water will not damage the lens coating, but the coating is very fragile, and it may damage the coating when rubbing. Moreover, lens water is also easy to leave water stains on the lens surface (in this case, it is of little significance to change fingerprints with water stains). As for the upstairs talk about using alcohol, I have reservations. Many old SLRs do use alcohol and fans to clean them, but Canon's instructions clearly point out that it is not allowed to use detergents containing organic solvents such as alcohol and gasoline (the instructions in the three instructions at hand, G 1 1, Nikon D5100,600d, do not mention alcohol, but they also say that organic solvents cannot be used to clean them). Therefore, drinking is not recommended.

3. Installing a UV mirror will have some influence. Even if it is a very high-grade UV mirror, the lens transmittance will be lost. At present, the digital camera photoreceptor is not sensitive to ultraviolet rays, and installing a UV mirror is only to protect the lens. It is not recommended unless it is used in a very harsh environment, such as sandstorm.

4. Don't clean up if it's not outrageous. The surface of the lens barrel can be clear and the lens can be cleaned less.

5, a fingerprint has no effect, the fingerprint falls within the focal length of the lens and will not be imaged on the photoreceptor. Does not affect the picture quality. You'd better not wipe it. The lenses are worn off. Unless something corrosive sticks to the lens. If the lens is used for a long time, it will inevitably stick with dust, fingerprints and the like. If there is a lot of dust, just blow it with a balloon.

6. Contacts can be cleared by themselves. If the contact oxidation is serious, it doesn't matter if the lens is not involved. You can wear an eraser.

In this case, even if you get a Canon service point, they will try their best to persuade you not to clean it.