Which is the best to buy a polarizer or a gradient mirror, and what is the difference between a pola

To buy that one of these lenses, you first have to understand their function. The role of polarizers is to eliminate reflections on the surface of non-metallic objects (such as glass "not a mirror" and water surfaces) and to deepen saturation (leaves in the sun), while gradient mirrors are used to reduce the difference between the bright and dark parts of the composition. In general, polarizers are used more.

In the digital age, the gradient lens generally works not only well, but it is enough to use ps, and the polarizer is indeed a little useful when shooting landscapes, but it is generally useless when shooting people.

There is no difference. A polarizer, also known as a polarizer or PL mirror for short, is a type of color filter. The color removal function of polarizers is to selectively let light vibrate in a certain direction through, and is commonly used in color and black and white photography to eliminate or attenuate strong reflections on non-metallic surfaces, thereby eliminating or mitigating light spots.

It works by selectively filtering light from a certain direction. By filtering out many polarized light in the diffuse reflection, the intensity of light in the sky is reduced, the sky is darkened, and the contrast between the blue sky and the white clouds is increased. In the actual shot, you need to look at the viewfinder and rotate the front mirror, the effect is most obvious in the viewfinder when the sky is darkest, and the difference between the darkest and the most revealing is 90 degrees.

You can go anywhere between the darkest and brightest angles as needed.

The advantages and disadvantages of gradient glasses are explained below

Gradient lenses also have many disadvantages, because they are easily affected by the aberrations of the surrounding area when looking at the middle and near range, and some patients may need to adapt to the aberration of the surrounding area and adjust the habitual posture of reading, otherwise they are prone to eye pain, dizziness, headache, and nausea when wearing. Continuous clear vision: Because the near add-on number continues to increase in the gradient area, under the appropriate head position, the wearer can obtain continuous clear vision from the far point to the near point through the gradient lens.4. Convenient, a pair of glasses solves all problems.

5. Comfortable intermediate distance vision, progressive lenses are the only corrective lenses that provide clear and comfortable intermediate distance vision in the case of any near-use additional degree. 6. Continuous clear field of vision, gradient lens provides from far to.

First, the structure is different.

1. Polarized sunglasses: Polarized sunglasses divide the lens into two layers, and sandwich a layer of polarizing film between the two layers of lenses.

2. Gradient sunglasses: The color of the lens transitions from dark to light. It looks more fashionable and beautiful. However, when the polarizer is made into a gradient color, it will affect the effect of polarization.

Second, the principle is different.

1. Polarized sunglasses: because the crystals of silver halide are working. Under normal conditions, it keeps the lenses perfectly transparent. When irradiated by sunlight, the silver in the crystal separates, and the silver in its free form forms small aggregates inside the lens.

2. Gradient sunglasses: Gradient means that the color of the entire lens is not the same, that is, the color of the upper part is darker, and the lower part is lighter, so that the effect will look very fashionable, and when you look closer, you will not feel very dark.

Third, the function is different.

1. Polarized sunglasses: Because polarized sunglasses have the function of polarizing light, they can block all harmful rays without affecting the transmission of visible light, which can truly protect the eyes. In addition to the basic anti-ultraviolet function, polarized sunglasses also have anti-glare, road reflection light, water surface scale light, etc., suitable for driving, fishing, traveling, and daily wear.

2. Gradient sunglasses: protect glasses when the light is strong; Beautiful.

Encyclopedia - Polarized sunglasses.

Encyclopedia - Gradient sunglasses.

A filter is a polarizer that is stacked on top of each other, and compared to a polarizer that filters out the light at a specific band angle, the filter has a filtering effect on the light of all filters. CPL and ND are both must-haves for scenery. The former eliminates reflections, improves contrast and slow tones, and the latter simply reduces light and wantons, so that long**photography will not be excessive**.

ND filters are also often used in cameras where shutter angles, apertures, and indexes must be strictly required to ensure that they are correct.

The differences between a filter and a polarizer are as follows:

1. Filtering mirrors are also called neutral gray density mirrors, neutral gray mirrors or gray mirrors for short, ND mirrors, and their function is mainly to reduce the amount of light entering the camera.

2. Polarizer, also known as polarizer, referred to as PL mirror, is a color filter. The color removal function of polarizers is to selectively let light vibrate in a certain direction through, and is commonly used in color and black and white photography to eliminate or attenuate strong reflections on non-metallic surfaces, thereby eliminating or reducing light spots. For example, in landscape and landscape photography, it is often used to express the texture of objects in strong reflections, highlight the scenery behind glass, darken the sky, and express blue sky and white clouds.