求翻译：Manufactured by Alan Gordon Enterprises, the Mark Vb is the latest version of the Academy Award Winning Mark V and continues to be the choice of Film and Video makers worldwide. The Mark Vb has all the features of the Mark V plus new markings on the Aspect Ratio ring, making it easer to read for both film and video use. We also eliminated the 1/2 " video window and replaced it with the current video chip standard of 2/3." Film sizes and video formats are color-coded for quick reading.是什么意思？

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