Leica x 1, novice, why not wipe the lens 3.4 times?

A little damage doesn't make much difference.

1. In fact, the membrane is still very strong and not so fragile.

It is suggested to buy a lens pen and wipe it from the inside out. It may not have been cleaned.

3. I should have played a great role in my heart, even when I first started playing.

If you want to dig deeper, you need to understand the function of the coating, not as simple as the paragraph copied by a friend on the first floor. If the film used to reduce light reflection (Canon SWC coating) is damaged, that is another problem.

In addition, it has an influence on imaging in theory. In fact, is this effect within the recognizable or acceptable range of human eyes? It depends on the individual ...

Coating is very learned. Later, the "super coating" technology appeared, which can coat several or even dozens of films on the lens. Why paint the lens with so many layers? Just to increase the transparency of the lens? Actually, it's not that simple. There are some special requirements for the materials used to make lenses. The commonly used material is an optical glass, commonly known as "heavy flint glass" (its customary code is SF6). Of course, this formula of "heavy flint glass" is easy to find in the library. However, this heavy flint glass has a fatal disadvantage: serious color difference and truncated color spectrum (that is, truncated blue light). If you copy the book intact, the characters in the film made of this glass will definitely become patients with jaundice and hepatitis. So how to improve the properties of heavy flint glass? Some people may suggest using fluorite (calcium fluoride) as a low color difference material, but in fact this is not possible because its tortuosity rate can not meet the requirements. Then we have to go back to "heavy flint glass", hehe, in fact, the glass formulas actually adopted by major manufacturers are all made on the basis of books, adding the unique flavor of each family. These flavors are the key factors to improve the properties of heavy flint glass. As for what those tastes are, the answer to this question is actually why Zeiss is Zeiss; Nikon is Nikon. As we all know, the thick flint glass has "cut off" the blue part of the chromatogram, and each family has its own unique martial arts to improve its optical performance; I use the word improvement here, not change; As the saying goes, "A leopard cannot change his spots. It is not enough to add some "flavor" to glass raw materials. In order to make the color reproduction of the lens more realistic, each family will try their best to show their martial arts in the lens. For example, a lens in a lens is red, so use a blue lens in the light path to neutralize it; If this still doesn't meet the requirements, then work hard on the lens coating and put on colored glasses for the lens. In fact, this "coating" is really a bit particular.