Макрокольца Kenko
19 Апр 2009
Таблица коэффициентов увеличения и факторов экспозиции из инструкции к автоматическим макрокольцам Kenko.
Image magnification ratios and exposure factors. (50mm standard lens).
|
Auto Extension Tube |
Distance Reading of Master Lens |
Image Magnifi-cation Ratio |
Field Coverage (cm) |
Distance from Lens Front to Subject (cm) |
Exposure Factor |
|
12 mm |
infinity |
0.24 |
10?15 |
ab. 21 |
1.5 |
|
0.5 m |
0.35 |
6.9?10.3 |
ab. 16 |
1.8 |
|
|
20 mm |
infinity |
0.4 |
6?9 |
ab. 13 |
2 |
|
0.5 m |
0.51 |
4.7?7 |
ab. 14 |
2.3 |
|
|
36 mm |
infinity |
0.72 |
3.3?5 |
ab. 7.7 |
3.0 |
|
0.5 m |
0.83 |
2.9?4.4 |
ab. 7 |
3.4 |
|
|
12+20 mm |
infinity |
0.64 |
3.8?5.6 |
ab. 8.5 |
2.7 |
|
0.5 m |
0.75 |
3.2?4.8 |
ab. 7.5 |
3.1 |
|
|
12+36 mm |
infinity |
0.96 |
2.5×3.7 |
ab. 6 |
3.9 |
|
0.5 m |
1.07 |
2.3?3.4 |
ab. 5.5 |
4.3 |
|
|
20+36 mm |
infinity |
1.12 |
2.2?3.3 |
ab. 5.3 |
4.5 |
|
0.5 m |
1.23 |
2?3 |
ab. 4.9 |
5 |
|
|
12+20+36 mm |
infinity |
1.34 |
1.8?2.7 |
ab. 4.5 |
5.6 |
|
0.5 m |
1.47 |
1.6?2.4 |
ab. 4.2 |
6.1 |