actively carry out the law on civil air defense education, drawn out of the air defense in Pingliang city Building under easy fare, daily special inspection and regulation, overfulfilled the province upper and lower knots of up to 500,000 yuan fee collection tasks. 5, further standardize internal management, improve staff quality. Adhere to the
actively carry out the law on civil air defense education, drawn out of the air defense in Pingliang city Building under easy fare, daily special inspection and regulation, overfulfilled the province upper and lower knots of up to 500,000 yuan fee collection tasks. 5, further standardize internal management, improve staff quality. Adhere to the
actively carry out the law on civil air defense education, drawn out of the air defense in Pingliang city Building under easy fare, daily special inspection and regulation, overfulfilled the province upper and lower knots of up to 500,000 yuan fee collection tasks. 5, further standardize internal management, improve staff quality. Adhere to the
单反相机使用扫盲
一、照相模式
通常情况下，刚开始学照相可以采用光圈优先模式（AV模式），如果此模式不会调就采用全自动模式（□模式）。
二、光圈优先模式下各参数调整方法及技巧
（一）快门速度
【名词解释】快门速度是控制拍照时照片曝光时间的，其他因素不变时，快门越慢，曝光的时间就越长，相片就越亮。
【调整方法】光圈优先模式下，不用调快门速度（机器自动根据光圈大小匹配快门）。
【使用技巧】通常情况下，快门速度不慢于1/200秒，照片可以保证不虚，特殊光线条件下1/100秒也凑合了，再慢的话不用三脚架照片肯定就虚了。拍夜景必须用三脚架。
如果快门速度不够快，可以通过加大光圈或调高ISO来解决，实在解决不了就开闪光灯，但是闪光灯的有效照射距离也就是4米左右，超过了就无意义了。
（二
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