Ask photographers: which brand should I buy for UV mirror and nd mirror? Excuse me, why I saw that there are many brands of uv mirrors and nd mirrors on the market, and the prices are all the same.

UV mirror mainly protects the front lens. Functions such as ultraviolet protection are not as important as advertised. UV mirror is good, ultra-thin, strong light transmission, higher ability to reflect ultraviolet rays, thicker coating and better coating process. High-grade UV is more a brand factor, and the price is very high. Kengo's comparison is mid-range, and B+W's comparison is high-end.

You can see the difference between two different UVs on white paper, and the good one is more transparent. But in practice, the difference is not as big as the price.

As mentioned above, the UV mirror is coated, so it has a lifetime in theory. After a long time, the coating is gone. This is only theoretical. I just want to say that there is no need to buy anything particularly expensive.

There are two kinds of neodymium mirrors, one is full neodymium mirror and the other is graded neodymium mirror. Generally speaking, that is to say, all neodymium mirrors are neodymium mirrors. This kind of neodymium mirror is mainly used to reduce the amount of light in order to use a lower shutter. According to the different dimming amount, that is, the different EV values, it is divided into ND4.

ND8

Wait a minute. ND4 is 2EV reduction, twice exposure, ND8 minus 3EV, and so on.

If you just shoot running water, ND4 is enough, but ND4 mirror is not recommended, and CPL polarizer is recommended, because polarizer can also reduce the exposure of 2EV and can be used as ND4.

It's best to buy an ND mirror just for fun, because to achieve the goal, one piece of ND is not enough, and many pieces may be needed, so the cost will be very, very high.

Gradient neodymium mirror, translucent half neodymium, used to reduce light ratio. This is more useful than all ND mirrors, but the digital age is not so big, and the tolerance of RAW can basically be met.

Neodymium mirror is not a colorless and transparent lens, so the problem of color cast is very common, and the rejected neodymium mirror is seriously yellow.