الافلام المعاكسة الملونة .. كتاب فن التصوير الفوتوغرافي

Color films:

Colored reflective films after acidification produce transparent positive slides. The final result can be seen immediately after the acidification process. Without any transitional step

The reflective film is very similar to the negative film, as it is composed of three light-sensitive layers in addition to the yellow filter layer. It is also displayed by light in the same way. The difference between it and transparency films is that some types have color couplers integrated into the emulsion layer, and other types without couplers. The latter type is difficult for amateurs to develop because it needs high laboratory techniques, an example of which is Coda Chrome films. .

. Advanced amateurs can develop films with color couplers, and all they need is patience, as the development process may take several hours. The stages of developing colored transparency films go through stages that we will list here, noting that these stages differ according to the system used in developing.

1- The first endorsement
2- The endowment bath The endowment bath

3- The second exposure

4- Color endorsement

6- Ghusl - color conversion bath (or bleaching - washing).

As we mentioned earlier, any change in the temperature here will lead to a loss of balance between the colors. When this happens, the film spoils and there is no way to fix the error, unlike black and white acidification, where we can adjust the degree of color density in the negative by slightly manipulating the print during the printing stage, as we have seen.

Below we include a brief explanation of some of the previous endorsement steps. The first endorsement step is very similar to the endorsement of black and white film. If the film is fixed and washed after this step, we get a black and white negative film!

3- The second exposure is to convert the negative film into a transparency film. The film is removed from the endorsement basin, left wrapped around the reel, and then exposed to the light of a nearby lamp. If the film is washed and fixed after this step, we get that film

Black and white transparency! The step in which the color couplers are activated, turning the film into a color film

color temperature:

Color films are designed to be affected by certain types of lighting. Some of them give prints that are colorally balanced in an excellent way, as they were photographed in normal daylight, but they produce prints with an orange tinge when used for indoor photography under lamp lighting.

Color balance is achieved by the color temperature measured in degrees Kelvin

Kelvin

Here are some examples of different types of lighting and their color temperature measured in Kelvin in order to visualize what we mean by the expression color temperature:

1- Electronic flashes

Blue flash beads

3- Daylight

- Fluorescent tubes «normal lighting neon» floodlights Photofloods

Color films in general and transparency films in particular are designed to be equilibrated to a specific color temperature. There are two basic types of transparency films: daylight films and tungsten films. When you use a 3400K Tungsten Balanced Film for filming in daylight, the image will appear as if it was taken in the middle of the night, as it will be black and dark blue. with 7

A way to get around this hurdle is to use correction filters. With the help of the appropriate correction filter, we can shoot in daylight on a balanced film with tungsten lighting or vice versa. The filter rebalances the light before it reaches the film. In this case, it remains for us to compensate for the missing amount of light due to the use of the filter, by being guided by the appropriate filter factor.

There is a huge range of correction filters on the market, which makes it easy to balance any film for the available light during shooting. Since you will work in daylight most of the time, it is recommended to have a filter that converts the color temperature of 3600 3 into another 3400 filter to give you the opposite of the previous result when photographing indoors. These filters have other benefits than those we mentioned. For example, you can make a blurry scene look more dramatic by using the appropriate filter. An important note that you must remember

That you should not use any of the filters for black and white photography with color photography except for the UV filter. Correction filters are different from normal filters, no matter how similar they are in shape and color, they are completely different from the outside

Color and color contrast: Color films differ from black and white films in their narrow exposure. As its exposure range allows only one stop increase or decrease unlike normal films. Therefore, accuracy in exposure is necessary in order to obtain good results.

The issue of harmony and contrast between colors must be taken into account when color photography. It is that the two things are usually achieved by placing two colors next to each other according to a specific system. For example, to obtain a strong contrast, the base color must be placed with its complementary color. An example of this is a portrait of a blonde girl on a blue background.

In order to obtain a good color harmony, two primary or complementary colors must be placed next to each other. An example of this is a red flower in a green meadow.

Finally, amateurs tend to stuff their photos with a huge amount of dissonant colors. Avoid this, as it is evidence of randomness in capturing and lack of focus in choosing the appropriate colors. Try to shorten the colors in one shot as much as possible, according to the previous simple rules