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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。
0.24 | 0.3 | 0.4 | 0.5 | 0.7 | 1.0 | 2.0 | 3.0 | 5.0 | ∞ | |
---|---|---|---|---|---|---|---|---|---|---|
2 | 0.236 - 0.237 |
0.300 - 0.300 |
0.399 - 0.401 |
0.498 - 0.502 |
0.695 - 0.705 |
0.990 - 1.011 |
1.955 - 2.048 |
2.896 - 3.112 |
4.711 - 5.327 |
78.755 - ∞ |
2.8 | 0.236 - 0.237 |
0.299 - 0.301 |
0.398 - 0.402 |
0.497 - 0.503 |
0.693 - 0.707 |
0.985 - 1.015 |
1.936 - 2.068 |
2.855 - 3.161 |
4.601 - 5.476 |
55.727 - ∞ |
4 | 0.236 - 0.237 |
0.299 - 0.301 |
0.398 - 0.402 |
0.496 - 0.504 |
0.691 - 0.710 |
0.979 - 1.022 |
1.911 - 2.098 |
2.799 - 3.233 |
4.455 - 5.702 |
39.428 - ∞ |
5.6 | 0.236 - 0.237 |
0.299 - 0.301 |
0.397 - 0.403 |
0.494 - 0.506 |
0.687 - 0.714 |
0.971 - 1.031 |
1.877 - 2.141 |
2.724 - 3.341 |
4.263 - 6.055 |
27.907 - ∞ |
8 | 0.236 - 0.237 |
0.298 - 0.302 |
0.395 - 0.405 |
0.492 - 0.508 |
0.682 - 0.719 |
0.960 - 1.044 |
1.831 - 2.206 |
2.624 - 3.507 |
4.018 - 6.638 |
19.765 - ∞ |
11 | 0.236 - 0.238 |
0.297 - 0.303 |
0.394 - 0.407 |
0.489 - 0.512 |
0.675 - 0.728 |
0.944 - 1.064 |
1.769 - 2.305 |
2.496 - 3.773 |
3.718 - 7.690 |
14.004 - ∞ |
16 | 0.235 - 0.238 |
0.296 - 0.304 |
0.391 - 0.410 |
0.484 - 0.517 |
0.665 - 0.740 |
0.923 - 1.093 |
1.689 - 2.462 |
2.335 - 4.229 |
3.364 - 9.923 |
9.933 - ∞ |
22 | 0.235 - 0.239 |
0.295 - 0.306 |
0.388 - 0.414 |
0.478 - 0.525 |
0.651 - 0.758 |
0.895 - 1.137 |
1.588 - 2.727 |
2.141 - 5.108 |
2.968 - 16.926 |
7.053 - ∞ |