Reply for the Reviews of David, Wall, JC, and Jerry
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Upgraded APP collected from H. Cho suggestions
Please see the review of H. Cho, we upgraded the APP according to his suggestions for 2 times. The bugs are resolved and the APP is more convenient now.
For light meter photography, VBR-PHO is a new kind. But it is the time to choose VBR-PHO now after the markets test for 3 months.