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读了《照相机》杂志今年第４期詹小洪先生的“再谈闪光灯闪光指数的计算”一文，本人想谈一点意见。美能达公司是国际上生产闪光测光表较著名公司之一，美能达闪光测光表测试闪光指数时一般有两种显示模式：显示ＥＶ值或光圈值。美能达测光表给出的闪光指数计算公式是：ＧＮ＝?
I read the article entitled “Calculation of Flash Index of Flash Light” by Mr. Zhan Xiaohong in the fourth issue of “Camera Magazine” and I would like to make some comments. Minolta company is one of the more famous companies in the world to produce flash metering, Minolta flash metering test flash index generally have two modes: display EV value or aperture value. Minolta meter flash index given formula is: GN =?