K&F Concept 77mm Variable ND Filter
| Article number: | KV31 |
| Availability: | In stock |
| NDnumber | Optical density | f-stop reduction | Fractional transmittance | |
| 0 | 0 | 100% | ||
| ND2 | 0.3 | 1 | 50% | |
| ND4 | 0.6 | 2 | 25% | |
| ND8 | 0.9 | 3 | 12.50% | |
| ND16 | 1.2 | 4 | 6.25% | |
| ND32 | 1.50 | 5 | 3.13% | |
| ND64 | 1.8 | 6 | 1.56% | |
| ND100 | 2 | 62⁄3 | 1% | |
| ND128 | 2.1 | 7 | 0.78% | |
| ND256 | 2.4 | 8 | 0.39% | |
| ND400 | 2.6 | 82⁄3 | 0.25% | |