バウンス フラッシュのコア技術: 天井/壁の反射角計算、柔らかな光の拡散、クマの防止

1. バウンス フラッシュの物理的性質: 5cm の小さなランプ ヘッドを 5m の巨大なソフトボックスに変える

Why does the direct flash look like a picture of a prisoner in an interrogation room, but the jumping flash looks like a professional studio flat light?

1. 光源の発光表面積と光の質の反比例の法則:

• The flash is directed at the person, with a light-emitting area of only 5x7 cm.それは非常に硬い光源であり、まぶしい油っぽい光と硬い黒い影を人の顔に投影します。

2. バウンスフラッシュの天井拡散反射再構築:

• Point the flash head upward at a 75-degree angle, toward the white ceiling;
• 天井の粗い石膏ラテックス塗装面に強い光が当たると、強いランダムなランバート反射が発生します。
• The entire ceiling of several square meters is instantly lit up into a huge diffused luminous plane;
• The light falling from the sky is extremely soft, and the shadow transition is silky smooth, completely eliminating shine and hard shadows!

2. Two ultimate skills in jump flash practice: angle calculation and small white card

1. The angle of incidence is equal to the angle of reflection (Angle of Incidence = Reflection):

• The lamp head cannot be pointed straight up (90° vertically upward), otherwise the reflected light will still be the direct top light, which will leave ugly black shadows (dark circles) under the eye sockets;
• Golden angle: Elevation angle 60°~75° diagonally forward ceiling reflection, allowing the main reflected light path to be 45 degrees to gracefully illuminate the character's face;

2. Pull out the [white reflective card (Catchlight Card)] that comes with the lamp head:

• フラッシュの上部には、取り出すことができる小さな白いプラスチック カードが組み込まれています。
• Pull it out halfway: most of the light hits the ceiling for soft diffusion, while a small part of the light is bounced forward directly by the small card, precisely lighting up a bright and bright eye light in the model's pupils and filling in the shadow of the chin!

3. サイド バウンスは、高度な窓側の片面ライトをシミュレートします:

• Rotate the lamp head 90 degrees to the left or right to reflect it towards the white wall beside you; the light will be diffused and wrapped around the character from the side, sculpting the outline of the facial features in three dimensions.

3. Jumping flash fatal rollover trap: colored wall pollution

• Bounce flashes must be white or light gray ceilings and walls!
• If the walls of the restaurant you are in are painted bright green, orange or crimson: the light reflected by the flash will be completely dyed into a dazzling green light or blood red light, directly ruining the character's skin color. At this time, you must immediately abandon the bounce flash and use a diffuser to shoot directly or trigger the flash off-camera.

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