TAILIEUCHUNG - Light—Science & Magic- P5

Tham khảo tài liệu 'light—science & magic- p5', công nghệ thông tin, đồ họa - thiết kế - flash phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | LIGHT SCIENCE MAGIC The key triangle extending from the eye through the cheek to the lip line is the starting point for good portrait lighting. face. The extreme example of such flat lighting comes from mounting a strobe directly on top of the camera. Evaluating whether the lighting is too flat can be difficult for photographers who are just beginning to learn portrait lighting especially if the picture will be printed in only black ink. Anticipating how color translates to shades of gray takes practice. But the decision becomes simple when we see that such lighting also makes the key triangle so large that it is no longer a triangle. 188 AN ARSENAL OF LIGHTS Flat lighting far too uniform to show contour is the result of placing the main light too near to the camera. We can usually improve such lighting by moving the light farther to the side and higher to reduce the size of the key triangle. To maximize contour we move the light far enough to get the key triangle as small as possible but stop just short of moving it far enough to create either of the following two problems. Key Triangle Too Low Main Light Too High Regardless of whether the eyes are the window to the soul they are certainly essential to almost any portrait. Keeping the eyes of the subject in shadow can be unsettling to anyone looking at the portrait. Figure illustrates this problem. Notice how the strong eye shadow eliminates the top of the key triangle and produces an unnatural and ghoulish picture. 189 LIGHT SCIENCE MAGIC The unsettling raccoon eyes that we see here come from lifting the main light too high above the model s face. This shadow is there because we positioned our light too high above the head of the subject. Fixing the problem simply means lowering the light a bit. Key Triangle Too Narrow Main Light Too Far to Side Figure illustrates still another potential problem. We positioned the light so that the nose casts a dark shadow across her cheek. This shadow blocks

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