.. الفصل الثالث عشر الاضاءة الاصطناعية والبورتريه .. كتاب فن التصوير الفوتوغرافي

Chapter Thirteen

Artificial lighting and portraiture

Some hobbyists avoid the use of flood light and spot lighting because of their many complexities. But they lose out on a lot of fun. You can also have absolute control over the power of illumination when you work with tungsten lights, which helps you a lot when photographing portraits. In general, the main field of work for artificial lighting is portraiture, and this is what we will discuss in this chapter, film and artificial light:

Since the dominant color of the tungsten lamp is red, it will affect the performance of the lamp

the film . And if you are someone who uses color transparency film, then you should load your camera with balanced film with tungsten lighting, or shoot with daylight film with the help of a Conversion Filter. Black and white films lose some of their speed with artificial lighting, which causes underexposed images if you do not pay attention to that and compensate for the deficiency. For example, ASA125 film will fall back to ASA64. This is the use of tungsten lighting, which means losing one stop that you have to compensate for when filming.

But this does not apply to all films, the higher the speed of the film, the lower the amount of compensation needed because fast films are more sensitive to the red end of the spectrum

As for portraiture, the film suitable for it is ASA125 sensitivity, such as the Ford FP4 or Kodak PLUS X. The speed will decrease to ASA64, but with fine drip it will give you great results. And since you can control the brightness of the tungsten, this makes it easier for you to control the contrast and keep it within the scope of the film

Choosing the necessary lights:

For portrait photography, you need two flood lights of 500 watts and a third lamp of 250 watts for hair lighting. There are types of these lamps that are equipped with special clips that allow them to be attached to the back of a chair, door, or any other suitable object to make it a pillar. There are also adjustable stands, and these are of course more expensive than tweezers, but they give you room for more freedom of movement and creativity.

Portrait lighting:

Lighting the subject with more than one light source is very easy, but you have to pay attention so that the subject appears as if it was lit by one light source. The lighting must match the sun in its formation of things, that is, it should come from one direction, making one group of shadows for the subject, because things in nature have one shade, and everything else is considered out of the ordinary and unnatural. Start by placing one lamp as the main light source and all other lamps as auxiliary to this main lamp. Use the other lamps to fill in shadows or to emphasize certain parts of the subject to create special effects. But beware of her taking control of the main lamp and making her own shades.

It is generally the most suitable combination for the use of the three lamps

1- A major deterrent

2 - Shade fill lamp

3- Hair light bulb