The extension available is 47.5 mm, and the focal length at the close focus point is 76.2 mm.
Corrected focal length = Fc
| Magnification | Subject distance | Correcting Lens | ||||||||
| Fc | Near focus | Far focus | Near focus | Far focus | Focal Length | diopters | ||||
| 105 | mm | 1.00 | 0.00 | 6.00 | in | Inf | 0.00 | |||
| 95.02 | mm | 1.21 | 0.11 | 4.96 | in | 39.37 | in | 1000 | mm | 1.00 |
| 86.78 | mm | 1.42 | 0.21 | 4.22 | in | 19.69 | in | 500 | mm | 2.00 |
| 79.85 | mm | 1.63 | 0.32 | 3.68 | in | 13.12 | in | 333 | mm | 3.00 |
| 73.94 | mm | 1.84 | 0.42 | 3.26 | in | 9.84 | in | 250 | mm | 4.00 |
| 68.85 | mm | 2.05 | 0.53 | 2.93 | in | 7.87 | in | 200 | mm | 5.00 |
| 64.42 | mm | 2.26 | 0.63 | 2.65 | in | 6.56 | in | 167 | mm | 6.00 |
| 60.52 | mm | 2.47 | 0.74 | 2.43 | in | 5.62 | in | 143 | mm | 7.00 |
| 57.07 | mm | 2.68 | 0.84 | 2.24 | in | 4.92 | in | 125 | mm | 8.00 |
| 53.98 | mm | 2.89 | 0.95 | 2.08 | in | 4.37 | in | 111 | mm | 9.00 |
| 51.22 | mm | 3.10 | 1.05 | 1.94 | in | 3.94 | in | 100 | mm | 10.00 |
| 33.87 | mm | 3.50 | 2.10 | 1.71 | in | 1.97 | in | 50 | mm | 20.00 |
| 26.25 | mm | 4.81 | 3.00 | 1.25 | in | 1.38 | in | 35 | mm | 28.57 |
| 22.11 | mm | 5.90 | 3.75 | 1.02 | in | 1.10 | in | 28 | mm | 35.71 |
| 90.71 | mm | 1.32 | 0.16 | 4.56 | in | 26.25 | in | Nikon 3T | 1.50 | |
| 80.49 | mm | 1.61 | 0.30 | 3.73 | in | 13.58 | in | Nikon 4T | 2.90 | |
| 71.82 | mm | 1.93 | 0.46 | 3.12 | in | 8.95 | in | Both | 4.40 | |
| 65.26 | mm | 2.22 | 0.61 | 2.70 | in | 6.79 | in | 2 4Ts | 5.80 | |