The wonders of National Geographic photography, geophotography knowledge?

You say: "contrast" is the reason. The premise is that there is a strong contrast between the front and back.

Use a telephoto to blur out the darker background, measure the frog, so that the background itself is too dark, and then darken the "black" in Photoshop and other software (only for the area below the medium gray 128 area of ** - here is the background - effective), and the background will have almost no details.

Of course, the hooligan's approach is to directly cut out the frog and paste it on a black background, and most of them also superimpose a layer of frog soft light to simulate the light of the frog and the surrounding space, but the effect is not so natural.

There are also solid cardboards (such as black) that can be placed behind the background to highlight the subject.

There's no need to shoot like this, in fact, as long as the frog is in strong sunlight, and something else is in the shadow, plus a telephoto can shoot such an effect, I have also shot something like this, **In the link, where the 1st and 2nd, are similar to this effect......There's also a pretty typical ......But it's not ...... anymoreSuch a **, you can refer to the people who shoot lotuses, many of them are ...... like this

You just get the frog in the house, put the frog on the mirror (for home use), use a DSLR camera and a macro lens, and turn it to night shooting mode. It's just that their machines are good and have special tools, so the effect is not as good-looking as theirs, and it is obvious.

Extra mission two Uyghur for.

Explanation of terms :** Generally speaking, the operation of pressing the shutter to make the film sensitive is called **, and the operation of sensitizing the printing paper is also called **.

Contrast refers to the degree to which there is a difference between depth and light, light and dark. Similar to the effect of TV contrast size: the image contrast is large when the contrast is large, and the opposite is small.

Depth of field refers to the range of clear depth on **. When the light is strong, the circle is small, and the depth of field is large, and vice versa.

f4,,f8,……is the aperture, and the higher the number, the smaller the aperture.

1/15，1/30，1/60，1/125……is the shutter speed, and the larger the denominator, the faster the shutter speed.

When photography, you need to consider factors such as weather, time, season, environment (and even geographic latitude and longitude). For example, on a sunny day in summer, around 10 a.m. (or 3 p.m.), you can shoot "people landscapes" with an aperture of f16 and shutter 1 125.

When buying film, tear the carton containing the film, and a simple ** sheet is generally printed on the inside, which can be used as a reference.

Geographic photography is a part of the subject matter of photography, which is formed on the basis of landscape photography with the continuous in-depth development of geographical science research, and is also a branch of tourism photography. Through geographical photography, the use of geographic information and the creativity of tourism aesthetics can reflect the vast land of the motherland, the magnificent majestic appearance of mountains and rivers, as well as socialist construction, natural landscapes, human geography, historical relics, national features and other contents. If it is a foreign-related research, it can reflect the world scenery and the natural landscapes and customs of various countries.

Geographic photography mainly reveals the spatial distribution information of geographical landscape, natural features and human landscapes more intuitively through the first picture, which records the natural landscape and customs with aesthetic connotation, and expresses the photographer's sentiments and feelings, giving readers edification, enlightenment and beauty feelings. It is one of the most lyrical, informative, and informative forms of photography.

a) Mountains ; Mountains are one of the objects often represented in geographical photography, and the different postures of mountains show their different characteristics. 1. When the mountain is the main body, you can use dark and light tones to express the level and spatial perspective. 2. When the mountain is used as an accompaniment - bridges, temples, etc. can be used as the subject of photography, and the mountain can be used as the foreground or background, so that the foothold of the shooting can be displayed.

3. When the mountain is a loess slope, it mainly ingests buildings with obvious human effects, such as caves, terraces, artificial canals, etc., to reflect the loess style and construction scenery.

b) water; Water is the most attractive object in geophotography, whether it is used as a main scene or as a foil. 1. Calm water surface - it can reflect the reflection information of some target objects, and can also use the principle of mirror reflection to make the artistic conception effect of star twinkling. 2. Rivers, lakes, oceans, waterfalls, rain scenes, etc.—through water ripples, waves, reflections, etc., to capture water information and creative artistic conception.

These objects are mainly emphasized, and the dynamic effect of the picture is emphasized. 3. Underwater photography - this is a special kind of photography, which has obvious scientific and artistic nature. The creative concept of underwater photography can be indoors (such as swimming pools, hydraulic model rooms, underwater world playgrounds, etc.) or outdoors (such as rivers, oceans, etc.), but the premise is that the water body is required to be transparent, that is, a clear water body.

c) trees (vegetation); Trees (vegetation) have the greatest coverage (distribution) on the surface. 1. It often complements each other with mountains and water. The changes of the four seasons are shown through the changes in the tone and color of the picture, which has obvious characteristics of seasonal changes in climate.

2. As the main object of geographical photography and landscape photography, the regional characteristics are displayed through the types of trees (vegetation). Such as the famous Huangshan welcome pine and Shuanglong pine, Mount Tai's Wangren pine, Hainan's coconut tree, Fujian's banyan tree, Xinjiang's birch forest, Gansu's poplar tree, and the three north (North China, Northwest, Northeast) shelter forest, Inner Mongolia steppe, etc.