监控镜头焦距2.8MM3.6MM4MM6MM8MM12MM16MM25MM60MM分别能照到的距离和角度!复制的不要来了!镜头焦距 1/3寸CCD 1/4寸CCD 2.8mm 89.9° 75.6° 3.6mm 75.7° 62.2° 4mm 69.9° 57.° 6mm 50° 39.8° 8mm 38.5° 30.4° 12mm 26.2° 20.5° 16mm 19.8° 15.4° 25mm 10.6° 8.3°