简介:EDITOR’SNOTES:Mr.ChengWeidongisaseniorjournalistonanationalpictorialmagazine.HeenjoysaSpecialGovernmentAllowancefromtheStateCouncil.HewasamongthefirstgroupoftheStateEthnicAffairsCommission’s"OutstandingExpertofState"andnamedexcellentphotographerofthenationaldisasterreliefeffortin2010.Hehasmade
简介:The12ththePacificAsianMarginalSeas(PAMS)/JapanandEastChinaSeaStudy(JECSS)(PAMS/JEC-SS)Workshopwasheldon22-24November2003inHangzhou,China.Morethan100scientistsattendedthisworkshop.Therewere57oralpresentationsand43postpresentations,groupedinto7themes,namely,(1)StudiesoftheSouthChinaSea(2)StudiesoftheBohai,HuanghaiandEastChinaSeas
简介:产品特色:该系统能调正焦距.从可见光到红外照明转换时能用标准的镜头切换;可将焦距设计成可视和不可视的红外光线,锐度为24/7监视的单焦距平面;CS镜头.1/3″,27~12mm,F1.2,DC自动光圈;非球面镜的技术保证良好的锐度,对比度.低光圈F1.2;最大光圈:1:1.2;光圈:F1.2~F360(内置ND滤光片);最近的对焦距离为0.3m;光学后焦距为7.13mm(在户外);