欧洲女孩肤色测试卡BBC61A

产品说明

有了这个测试卡的几个彩色摄像机可以同时调整肤色的近似均匀再现性。首先照相机必须进行灰度的对数进行调整（TE108; TE109; TE153)。通过使用TE109改变BBC61而不改变光圈制成。与T13测试卡配合使用完成电影彩色胶片的测试肤色再现性。

这张测试卡为了避免表面因为光源照射的光泽影响摄像机检测结果，所以测量时测试卡要向前倾斜20°角。为此可使用一个折返剪辑。链子可以用于在其倾斜位置（例如在表装入SAD460横杆上）固定测试卡。

可以通过调节链条的长度来控制测试卡的角度改变。当测试卡的上缘与垂直位置距离是17厘米时达到一个20°的倾斜。

为了延缓测试卡褪色现象，使用时尽量用UV辐射较低的光照照射。使用之后测试卡应该用塑料盖盖好。

The flesh tone test chart is designed for evaluating the flesh tone rendition of electronic cameras.

The chart developed by the BBC London is a 4 color offset print. The spectral remission of the flesh tones approximates the natural flesh tone very well. Although the steep rise at the wavelength of about 580nm is somewhat to low (see Ill.2). The background is illuminated evenly but not absolutely neutral.

Ill. 2

With this chart several color cameras can be adjusted simultaneously to an approximate uniform rendition of flesh tones. First cameras have to be adjusted with a logarithmic gray scale (TE108; TE109; TE153). By using the TE109 the change to be BBC61 can made without changing f-stop. In combination with the T13 the chart is suited for testing flesh tone rendition of cine color films.

The chart has to be illuminated in a way that avoids glossy effects on the surface for all cameras involved. To achieve this, that chart should be tilted forward up to 20°. For this a foldback-clips can be used. Th e chain can be used for fixing the test chart in its tilted position (e.g. at the upper cross bar of the table mount SAD460). The length of the chain and thus the angle of the test chart can be varied by putting the side pieces into other links of the chain. A 20° tilt is reached when the upper rim of the chart is 17cm of the vertical position.

To delay the inevitable fading of the colors the chart should be illuminated if possible with light of a low portion of UV radiance. After use, the chart should be covered with the plastic cover.

The chart is available only in the A540 version.

More information about the BBC61:

E.W. Taylor; S.J. Lent: BBC Test Card No. 61 (Flesh Tone Reference) – Colorimetric and Other Optical Considerations.

SMPTE Journal, Vol. 87, February 1978, p. 76-78

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机身和包装尺寸为手动测量，由于测量工具和测量方法不同的因素，会存在1cm误差，但是不用影响运输和使用。
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小店产品都是实拍图片，但是由于不同显示器分辨率以及色温和对比度差异有所不同。
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