http://www.youtube.com/watch?v=pqpRQJhCHBo
Flash Metering Systems: Flash Exposure Measurement(測定) Strategies(策略, 計謀; 對策)
TTL: Through The Lens
TTL: Flash emits(散發, 放射; 發出) light until sensor shuts(關閉) it off
ETTL: Distance(距離) info is obtained from your focus(焦點, 焦距, 調焦) square(正方形, 平方).
Compares Light Output to Input Makes Calcultion Fires Main Flash To see both Pre-Flash and Main Flash: (看到預閃跟主閃的方式)
1, Shoot on Manual(用手動模式拍攝)
2, Use a 2-3 second Shutter Speed
3, Use 2nd Curtain Flash
ETTL2: 現在閃燈上寫的ETTL就是ETTL2 Better Calculations Lgnores(不顧, 不理會; 忽視) Smaller Reflective(反射的) Surfaces(面) Determines Distance From Lens Focus Ring.
http://www.rainbowphoto.com.tw/flashwork/technology.htm
歡迎光臨 大俠攝影教室 (http://www.dasha-photo.com/) | Powered by Discuz! X3 |