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Canon Speedlite 270EX Flash Review - The-Digital-Picture.com features Canon DSLR Camera and Lens Re
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日期:2024-05-07
1 Guide Number is based on a 105mm flash head setting with exception of the 2-position 270ex which is based on 50mm, the non-zoom-capable 220ex which is based on 28mm coverage and the 50D which is based on 17mm coverage. What is a "Guide Number"?...看更多