天气预报15天查询> 其他> 单反怎么设置焦距

单反怎么设置焦距

更新时间: 2020-11-01 00:00:00     

现在单反相机都是自动变焦。焦距可以不用自己调,如果想自己调节的话,旋转镜头是调焦距的最快方法。焦距,是光学系统中衡量光的聚集或发散的度量方式,指平行光入射时从透镜光心到光聚集之焦点的距离。具有短焦距的光学系统比长焦距的光学系统有更佳聚集光的能力。简单的说焦距是焦点到面镜的中心点之间的距离。照相机中焦距f

关键词: 怎么 设置 焦距

如有意见、反馈、侵权或投诉等情况,请联系:

电话:
邮箱:

我们将会在48小时内给与处理!

版权所有 Copyright ? 2009-2020 tianqiyubao3.com

页面:/news/view-149983/ | 耗时:0.0732 s | 内存:1.89 MB | 查询:4 | 缓存读取:4 写入:0 | 加载文件:23
select * from tbl_Articles WHERE ArticleID=149983 LIMIT 0,1
select * from tbl_Articles_data WHERE ArticleID=149983 LIMIT 0,1
select * from tbl_Articles_sphinx where id=149983 LIMIT 0,1
SELECT ArticleID,Title FROM tbl_Articles WHERE ArticleID IN(1102901,2476165,1106266,1132865,2382643,1069709,1110588,1124398,1075807,1062336,1275229,1108762,1062993,1063147,1593408,1305348,1065223,1125013,1092277,1126500,1074851,1081957,1110590,1082237,1060531,970035,1109723,1099857,1131703,1132725) ORDER BY field (ArticleID,1102901,2476165,1106266,1132865,2382643,1069709,1110588,1124398,1075807,1062336,1275229,1108762,1062993,1063147,1593408,1305348,1065223,1125013,1092277,1126500,1074851,1081957,1110590,1082237,1060531,970035,1109723,1099857,1131703,1132725)