
LEICA | 4 |
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Distortion
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| Effective Distortion |
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4 |
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3 |
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| 12 |
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2 |
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1 |
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0 |
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0 | 5 | 10 | 15 | 20 | 0 | 3 | 6 | 9 | 12 | 15 | 18 | ||||||||||||||
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| Y' [mm] = | 21.0000 |
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| X'[mm] |
Vignetting |
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| Distortion is the deviation of the real image height | |
| Vignetting | (in the picture) from the ideal image height. The | |
100[%] | relative distortion is the percentage deviation. | ||
| The ideal image height results from the object | ||
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| height and the magnification. The image height of | |
80 | 5.6 | 21.6mm is the radial distance between the edge and | |
4.0 | the middle of the image field for the format 24mm x | ||
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2.536mm. The graph of the effective distortion illustra-
60 |
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| tes the appearance of straight horizontal and verti- |
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| cal lines in the picture. |
40 |
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| Vignetting is a continous decrease of the illumina- |
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| tion to the edges of the image field. The graph |
20 |
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| shows the percentage loss of illumination over the |
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| image height. 100% means no vignetting. |
0 |
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0 | 5 | 10 | 15 | 20 |
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| Y' [mm] = | 21.0000 |