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摄影技术问答（一）编者按语：本连载根据本刊众多的读者来信并结合作者多年的摄影实践编写而成。是摄影活动中经常会遇到的一些实际问题。欢迎本刊读者在遇到疑难问题时来信询问。对于一些有普遍性的疑难问题，我们会在适当的时候，在“问答”专栏中解答；欢迎大家光顾“...
Photographic Q & A (A) Editor’s Note: This serial according to our readers many letters and combined with the author’s years of photography practice written. Some practical problems often encountered in photography. Welcome to our readers in the face of difficult questions asked by letter. For some common problems, we will answer them in the “Q & A” column at an appropriate time. We welcome everyone to patronize "...