When should the camera be equipped with a light lens

Depending on the type of filter, there are different uses.

Here are a few simple examples.

For example, if there is a little more fog in the air, if you want to get a more transparent **, you need to use a polarizer, and the polarizer has two types: linear polarization (PL) and circular polarization (CPL).

If you want to shoot at a wide aperture, but the light is too strong to be lowered to the fastest shutter speed that the machine can offer, use ND lenses to reduce the light. Of course, CPL has the same function.

If you want to get a bluer sky, you'll need a skylight.

Of course, if you are using film, a UV mirror is essential. Because the sun's ultraviolet light will make the film appear blue, that is, it will make the overall color cast, so a UV to filter out ultraviolet light is essential for the film machine. However, digital cameras are not sensitive to ultraviolet light, and in more cases, UV is used as a lens protector on the market of digital machines.

Filters were indispensable in many cases in the past lens camera era. And now the vast majority of digital cameras are useless. Now only one polarizer (PL) is useful.

It eliminates specular reflections. For example, photographing objects in shop windows. You can shoot yourself in it.

This can be avoided with a polarizer.

And a big part of it is because it's used to protect against dust and scratches.

Its main function is to reduce the amount of light entering the camera. The filter is very useful for a good **.

The filter can bring more first-class means when creating, so that the day becomes dark and the creative space can be played; In many cases, due to the intensity of the external light, we cannot get a long enough shutter time to achieve our photographic intentions, for example, when shooting water in the field, we want to use a 1-second shutter speed to make the water flow appear soft like cotton wool.

However, due to the strong light, even when shooting with the camera's minimum aperture and minimum ISO, the shutter speed is still around 1 30 seconds. The only way to do this is to use one or even two ND8 lenses to attenuate the light entering the lens.

Assuming that your camera does not add a shock absorber, the normal shutter speed is t, then after adding the filter lens, under the same light conditions, aperture size and ISO, the normal shutter speed = t * x, this x is the number marked behind the filter lens, if it is nd4, x = 4, if it is nd8, the greater the coefficient behind x=, the greater the impact on the color temperature.

Filters are used when the light ratio is large, such as sunrise and sunset. In order to ensure that the sky is correct, it is necessary to get the details of the dark parts. ND4 and ND8 are two levels. The higher the value, the lower the light transmittance.

What the filter does: If you want to use a slower shutter speed because the light is too bright, you can use it to reduce the shutter speed. If you buy only 1 one, you can buy a large light-reducing level.

1-UV mirror, which plays the role of protecting the lens.

2- Polarizer filters out horizontal, glass reflections, making the sky bluer and more saturated in color.

3- Neutral gray mirror ND, you can use a large aperture, slow shutter in bright environments.

1.Use when backlit, edge-lit, or flash photography.

2.Use when photographing both in the back and in the edge.

3.Use in light photography or night photography.

4.Use when protecting the lens.

Lens hoods are widely used for backlit photography and generally avoid glare. However, if the light source is close to each other, glare can still occur. At this point, you can use your hand to block the hood on the side where the light source is located.

Whether the glare is eliminated or not should be observed from the viewfinder. Generally speaking, lenses will come with a lens hood as standard, but different lenses are equipped with different lens hoods, and many products are not interchangeable.

A lens hood is required when backlit or when the lighting on the set is complicated.

When the light is backlit or the lighting scene is complex, a lot of unnecessary light enters the lens, which will cause flare, flare, etc., so that the overall saturation of the lens can be reduced, and the lens hood can effectively block stray light. In addition, the lens hood protects the lens from bumps and bumps, and prevents rain and other rain from falling directly on the lens in rainy and snowy weather.

1. The lens hood should be used when the camera is shooting in a backlit or side-backlit position. It is also best used when shooting outdoors.

2. The role of the hood has the following two aspects. a. Block the surrounding light to prevent lens halo. When shooting in backlit or side-to-side backlight, lens flares occur due to some of the light hitting the lens directly.

To avoid this, use a lens hood to block the surrounding light from entering the lens directly. b. Protect the lens from accidental injury. When shooting in the field or in noisy and chaotic places, there is a possibility of accidental bumps to the lens.

The use of a lens hood can protect the lens and avoid or reduce damage to the lens caused by bumps.

3. Different brands and models of lenses will use different specifications of lens hoods, and the shape, size, and inner wall of these hoods are different, and they are generally not interchangeable. Therefore, when using the hood, you should pay attention to the use of the manufacturer's original or recommended hood, otherwise it is likely to not play its due role, and it will also produce vignetting around the ** in serious cases.

In order to block direct or reflected light that can cause interference, it is typical to block sunlight from the front or side, reflection from glass, etc. When shooting landscapes outside, try to attach them unless you shoot them at close range, when there is a shadow of the flash at the wide-angle end, or when you attach it to the lens the other way around.

In order to prevent glare, it is also backlit, and when the light intensity is high, such as backlighting, side backlighting, etc., it is actually beautiful to have a little glare.

A lens hood is a device installed on the front of a photographic lens, digital camera and video camera to block harmful light, and it is also one of the most commonly used photographic accessories. The hood is available in a variety of materials such as metal, hard plastic, and soft plastic. Most 135 lenses come standard with a lens hood, and some lenses need to be purchased separately.

The lens hood models used for different lenses are different and cannot be used interchangeably. The lens hood is an indispensable accessory for visible light lenses!

When shooting outdoors, you should try to use a lens hood, which is very beneficial to improve the quality of your shots. A set of tests was done under the same test conditions (side backlight, long view). Shoot with and without a lens hood.

Among them, the image quality of the group of images with the lens hood is much better than the group of images without the lens hood! The halo in the upper right corner of the sky in the group of images with the hood disappears, and the color saturation and clarity of the picture are significantly improved.

The function of the lens hood is to suppress stray light from entering the lens to eliminate fog, improve the clarity and color reproduction of the image, and the main uses are as follows:

1. In backlight, side light or flash photography, it can prevent the entry of non-imaging light and avoid haze;

2. When shooting in the light and side light, the scattered light around it can be avoided from entering the lens;

Hood. 3. In light photography or night photography, it can avoid the surrounding interference light from entering the lens;

4. The lens hood can also prevent accidental damage to the lens, and can also avoid fingers touching the surface of the lens by mistake, and to some extent, it can shield the lens from wind, sand, rain and snow.

Lens hoods are widely used for backlit photography and generally avoid glare. However, if the light source is close to each other, glare may still occur, so you can use your hand to block the hood on the side of the light source, and you can directly observe the effect in the viewfinder if the glare is eliminated. In addition to the optical quality of the lens itself, the role of the hood is very obvious, no matter the color, sharpness and contrast of the lens shield are not ideal, and the use of the lens hood has good performance in these aspects, a small lens hood, the effect is very different.

The use of a lens hood is not only a means to improve the quality of the picture, but also a good professional habit, and it is also a manifestation of the professionalism of a rigorous photographer!

Take it on a sunny day.,Don't think about the so-called light so much.,You don't get tired of dismantling and disassembling it.。。。

Don't pretend in bad weather.

The hood is used to prevent light interference, for example, if you shoot portraits, there are desk lamps, there are also ceiling lights, maybe the TV is still on, such a light environment is more complicated, and the white balance is not accurate, so use a cover to block a little miscellaneous light, just a little effect, but not big, if you want to shoot a beautiful film in a magazine, you have to think of the lighting, and even use a flash to fill the light.

In most cases, it is not used, the lens hood is used to block glare, there is no glare in the room, and it is theoretically not necessary to install it, but considering that the lens hood also has a certain role in protecting the lens, it doesn't matter if you install it.

Lens shields?? It's a hood??? No matter in **, there may be stray light that affects imaging, such as a ceiling light indoors, which is definitely better than not installed.

The light shield is added to avoid interference from stray light.

There are many kinds of filters, each with its own use, not to mention which one is better, UV lens --- ultraviolet filter, reduce ultraviolet rays into the camera, has little impact on imaging, and now everyone uses it as a protective lens for the lens. It plays the role of dustproof and dirt-proof.

CPL --- polarizers. Polarizers are mainly used to absorb polarized light in the sky, reflection on the water surface, glass reflection and other non-metallic reflections. On a sunny day, some of the blue light in the sky is polarized, and the water vapor in the sky also interferes with the light in the sky to produce polarized light.

By adding a polarizer, the polarized light mentioned above can be eliminated, and the color vividness can be increased, and importantly, a very blue sky can be captured.

Gray lens: -- reduce the light entering the lens, for example, to shoot water flow to have a special effect, it takes 2 minutes of exposure, but even if the smallest aperture is used, the speed still cannot be slowed down to 2 minutes, then you can use gray lens to reduce the sensitivity of the camera.

Gradient lenses --- the top of the lens is gray, and the gradient transitions to the bottom to be completely transparent, which is used to suppress the excessive light in the sky.

There's a lot.,It's too tiring to play by hand.,Let's just say that.。。

B+W's UV mirror and the gold circle series are all good, about 1000-1800 yuan a piece.

The rest of the various filters are made by Tianfen, and they are also hundreds to thousands of yuan.

SLR cameras generally do not need filters, because various filters have their own functions, there are color filters, there are light filters, and after installation, they will have an impact on normal photography, unless they are added as needed for specific effects. If you want to add only the UV mirror, the UV mirror only filters ultraviolet rays, has no effect on the color of the photo, and does not affect the light transmission, it can protect the lens from dust, but to install the UV mirror must be installed, the price is best above 150 yuan, and the difference is not as good as not installing.

Infrared photography can be achieved by removing the low-pass filter before the sensor sensor, but it is easy to remove it, but it is difficult to put it back on.

The infrared filter filters the visible light and lets the infrared light through, but the amount of infrared light is not comparable to the visible light, so the time is very long.

If you use an infrared filter, you won't be able to take a picture of the effect of infrared photography anyway!

This is because the front of the image sensor is equipped with a low-pass filter that prevents infrared light from entering.

As far as I know, IR filters are generally used to shoot through dense fog and the like.

With the white balance adjustment function, digital cameras are able to achieve the best color results in a wide range of color temperatures. Therefore, with a digital camera, it is possible to eliminate the need for a variety of filters, and even if the white balance is not set correctly when shooting, it is still possible to adjust it satisfactorily with image processing software. However, this does not mean that all filters are unnecessary, and some filters for special purposes can be useful.

For example, when shooting black and white**, red is not noticeable, so use an orange or red filter to darken the blue sky to increase the brightness of the red flowers. For example, polarizers are also needed when it is necessary to eliminate reflections from unnecessary non-metallic surfaces (e.g., glass, water surfaces). In addition to eliminating reflections, polarizers can also make blue skies and white clouds whiter.

But polarizers can also make the otherwise bright sky too dark, and lose the real feeling, the old wolf thinks that it is okay not to use it, that kind of beauty is too fake.

The most widely used filter is the UV lens. UV mirrors were originally used to filter out ultraviolet rays, which increase the haze of the film. Although digital cameras are not sensitive to ultraviolet light, they are often used by digital camera users as lens protectors because colorless UV lenses are very inexpensive.

UV mirrors are also divided into grades, the main difference is the light transmittance, the use of optical glass is better than the use of ordinary glass, multi-layer coating is better than single-layer coating or no coating. In addition to the original camera manufacturer, the common brands of UV mirrors include Hoya, Kenko and B+W, the best is B+W, but it is also the most expensive. The cheapest is Baogu's single-layer coating (single-layer coating marked with N, multi-layer coating marked with O).