
對焦某對象時,在焦點前後的一定範圍也會被對焦;這一範圍被稱為景深。無論光圈大小,焦點後方的範圍總會大於其前方的範圍。焦距越短(廣角鏡頭)、光圈越小或物體越遠,則景深越深。
1.4 | 2.0 | 3.0 | 5.0 | ∞ | |
---|---|---|---|---|---|
2 | 1.393 to 1.399 |
1.994 to 2.006 |
2.986 to 3.014 |
4.962 to 5.039 |
651.526 to ∞ |
2.8 | 1.392 to 1.400 |
1.992 to 2.008 |
2.981 to 3.019 |
4.947 to 5.054 |
474.542 to ∞ |
4 | 1.390 to 1.402 |
1.988 to 2.012 |
2.973 to 3.027 |
4.926 to 5.077 |
335.603 to ∞ |
5.6 | 1.388 to 1.404 |
1.983 to 2.017 |
2.962 to 3.039 |
4.896 to 5.109 |
237.391 to ∞ |
8 | 1.384 to 1.407 |
1.976 to 2.024 |
2.947 to 3.056 |
4.854 to 5.156 |
167.976 to ∞ |
11 | 1.380 to 1.412 |
1.967 to 2.035 |
2.925 to 3.079 |
4.796 to 5.224 |
118.870 to ∞ |
16 | 1.373 to 1.419 |
1.953 to 2.050 |
2.895 to 3.113 |
4.716 to 5.323 |
84.162 to ∞ |
22 | 1.364 to 1.429 |
1.935 to 2.071 |
2.854 to 3.163 |
4.609 to 5.470 |
59.609 to ∞ |
列: 光圈值 行: 對焦距離 (米)*1
鏡頭光學結構圖
MTF圖表