​The types of filters and the using method

The types of filters and the using method

The types of filters and the using method Along with the advance of digital photography, the filter are no longer a necessity. In many cases, the camera can retain considerable shadow detail. However, if you want to shoot a long exposure of canvas prints pictures, silky texture, such as water and waterfalls, a ND filter still can help a lot. Do not use a filter, of course, you can also get a similar effect, but in some cases, under the premise of ensure the normal order of the exposure you is there is no way to prolong the shutter. When the sun is too strong, you will put on the sunglasses. What were you doing when there is a certain risk of activity; you will find a pair of goggles to wear. The same is true for the camera. Shooting scene in the daytime, you might meet the sky light than with the ground is too large, then it is difficult to grasp the correct exposure. If we can have a gray gradient in the mirror, scenes like this will not be so difficult.

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What are the types of filters? A total of nine kinds of commonly used filter: UV mirror, polarizer, gray, gray gradient in the mirror, mirror in the reverse of the gray gradient mirror, color filters, close-up lens filters and special effects. They generally made of glass (high-end products), resin and polycarbonate.

UV mirror in front of the main function is to protect the group of the lens is not scratch, and to avoid the lens on the coating polluted by dust and water vapor. Most UV lens are made of glass, many photographers like to put them as protection lens has been put on the lens. But I never use personal UV lens, because I prefer to use the hood, 2 it is very inconvenient to use UV mirror (when using other filters you need to remove the UV). In addition my lens is dustproof spill-resistant. And in my experience, UV mirror will not only reduce the quality, also produces dazzle light.

Polarizer is to enhance the effect of canvas prints images of the contrast and saturation of blue, offset images of the flare and reflective at the same time. When filming the sky with polarizer, can get more blue sky and contrast strongly in the clouds. When using a polarizer should try to let the lens and the Angle of the sun at 90 degree Angle, at the same time avoid using ultra wide Angle lens, because on the ultra wide-angle lens using polarizer will cause the screen brightness, apart from the average, also it is easy to appear dark corners. In addition, the use of polarizer probably loses two notches into the light. Depending on when the number of ND mirror can reduce certain amount into the light, reduce the shutter speed during production, create a very beautiful picture.

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And ND more like GND mirror (gray gradient in the mirror). This type of filter is usually square, is divided into two parts: one is the black part like a ND mirror, on the other side is transparent. Light in the picture are too big, a GND can save your photos. Through the study of the metering of two regions, calculate the sky and the ground exposure difference, and then you can choose according to the calculation results of different gear filter to balance the light than the picture.

GND mirror also can be divided into two kinds of hard and soft while. Hard edges GND is suitable for the frame to have a picture like the horizon and sea of light and shade parts with obvious dividing line scene; But if it is canvas prints images of no clear boundaries, so easy soft edge GND effect can be very natural pressure at the scene of the dark light and will not appear in the picture is not a natural boundary between light and shade. Finally, there is a kind of special - RGND ND mirror (in reverse grey gradient mirror). I did not buy, just borrowed from friends several times.

Similar to ordinary GND mirror, RGND one side is dark, the other is transparent, but at the end of the dark color most was in the middle of the filter, the filter edge slowly fades. At the time of composition, that is, if the sun in the middle of the picture and ordinary GND mirror is very difficult to balance the picture exposure, and reverse gradient lens can well deal with this situation

Color filters used in the era of film is more; main effect is to correction by the colour of the filter screen white balance. But in the digital age, has been rarely used filter to adjust the white balance. Close-up lens can make ordinary camera with the ability of macro photography, it can shorten the recent focus distance of the lens, but at the same time the quality will be much loss. Finally, there are all kinds of special effect filter (star light, diffusers, etc.).

I personally like to use square filter system. A filter bracket can support multiple filters used at the same time, so when you need you can even use &gnd ND mirror at the same time. And according to different diameter of the lens you only need to purchase a corresponding adapter ring can use the same set of filters.

To buy, I suggest buying big brand products. For most people, they do not want to spend too much money in the first set of filters, but because of the budget by means of compromise is eventually transition to you - you will find cheap filters only bad quality and serious partial color. Perhaps these are later period can be modified, but the opportunity cost and time cost will let you give up this filter.

On the investment in the equipment, I suggest you buy a stable enough tripod, ensure photos won't be lost because of the unstable camera. Use a tripod can let you easily get sharp canvas prints images, straight horizontal line; at the same time to stack footage or replace the filters will be very convenient. In addition, as far as possible with full manual mode shooting RAW format file, using ISO 100 or lower. Using a small aperture, you will be able to further extend the time of the shutter, and get a greater depth of field. You can you need to use a filter file is calculated according to the histogram (or effect) you need.

In light of environment, for example, the first thing I will use a small aperture, and then to the sky and ground, respectively metering. Eventually metering results differ on the number of gear is what I need to use the GND mirror file number. If it is flowing water, I will use ND mirror, and use the file number depends on the effect you need. I usually with 1 SEC shutter debugging for the initial value.