# K&F Concept Nano-X Variable ND Filter (ND2-ND400) vs B+W ND 106 (ND 1.8, 64x, 6-Stop) MRC: specs and price compared

A sourced, side-by-side comparison of the K&F Concept Nano-X Variable ND Filter (ND2-ND400) (K&F Concept) and B+W ND 106 (ND 1.8, 64x, 6-Stop) MRC (B+W) among nd filters.

## Side by side

| Spec | K&F Concept Nano-X Variable ND Filter (ND2-ND400) | B+W ND 106 (ND 1.8, 64x, 6-Stop) MRC |
| --- | --- | --- |
| US price | $93.99 | not published |
| Brand | K&F Concept | B+W |
| Released | 2023 | — |
| Filter type | variable | fixed |
| Density range stops | 1 to 9 (ND2-ND400) | 6 |
| Common thread sizes (mm) | 37-105 (49, 52, 55, 58, 62, 67, 72, 77, 82 common) | 48, 52, 58, 62, 82 |
| Coating | 28-layer multi-coating (nano, waterproof/oil-proof) | MRC (Multi-Resistant Coating, 8 layers per side) |
| Color cast note | No hard-stop detents; an X-pattern/color cast can appear if rotated past the effective range | Neutral-gray Schott glass; no manufacturer color-cast figure published for this legacy SKU |
| Front filter thread | Yes | Yes |
| Magnetic | No | No |
| Glass type | Japanese AGC optical glass | Schott glass, brass F-Pro ring |

## Key differences

- Filter type: K&F Concept Nano-X Variable ND Filter (ND2-ND400) variable vs B+W ND 106 (ND 1.8, 64x, 6-Stop) MRC fixed
- Density range stops: K&F Concept Nano-X Variable ND Filter (ND2-ND400) 1 to 9 (ND2-ND400) vs B+W ND 106 (ND 1.8, 64x, 6-Stop) MRC 6
- Common thread sizes (mm): K&F Concept Nano-X Variable ND Filter (ND2-ND400) 37-105 (49, 52, 55, 58, 62, 67, 72, 77, 82 common) vs B+W ND 106 (ND 1.8, 64x, 6-Stop) MRC 48, 52, 58, 62, 82
- Coating: K&F Concept Nano-X Variable ND Filter (ND2-ND400) 28-layer multi-coating (nano, waterproof/oil-proof) vs B+W ND 106 (ND 1.8, 64x, 6-Stop) MRC MRC (Multi-Resistant Coating, 8 layers per side)
- Color cast note: K&F Concept Nano-X Variable ND Filter (ND2-ND400) No hard-stop detents; an X-pattern/color cast can appear if rotated past the effective range vs B+W ND 106 (ND 1.8, 64x, 6-Stop) MRC Neutral-gray Schott glass; no manufacturer color-cast figure published for this legacy SKU
- Glass type: K&F Concept Nano-X Variable ND Filter (ND2-ND400) Japanese AGC optical glass vs B+W ND 106 (ND 1.8, 64x, 6-Stop) MRC Schott glass, brass F-Pro ring

## Sources

- K&F Concept Nano-X Variable ND Filter (ND2-ND400): https://www.kentfaith.com/KF01.1465 (kentfaith.com, verified 2026-08-16)
- B+W ND 106 (ND 1.8, 64x, 6-Stop) MRC: https://www.bhphotovideo.com/c/product/752876-REG/B_W_1066161_52mm_106_Solid_Neutral.html (bhphotovideo.com, verified 2026-08-16)

Canonical: https://frontdeskreview.com/gear/nd-filters/kf-concept-nano-x-vnd-nd2-400-vs-bw-nd-106-mrc/
Cite: Per The Front Desk Review, K&F Concept Nano-X Variable ND Filter (ND2-ND400) ($93.99) vs B+W ND 106 (ND 1.8, 64x, 6-Stop) MRC (not published) — sourced spec-by-spec comparison at https://frontdeskreview.com/gear/nd-filters/kf-concept-nano-x-vnd-nd2-400-vs-bw-nd-106-mrc/
License: CC BY 4.0.