# K&F Concept Nano-X Variable ND Filter (ND2-ND400) vs Tiffen Variable ND Filter: 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 Tiffen Variable ND Filter (Tiffen) among nd filters. K&F Concept Nano-X Variable ND Filter (ND2-ND400) is the cheaper of the two at $93.99.

## Side by side

| Spec | K&F Concept Nano-X Variable ND Filter (ND2-ND400) | Tiffen Variable ND Filter |
| --- | --- | --- |
| US price | $93.99 | $109 |
| Brand | K&F Concept | Tiffen |
| Released | 2023 | — |
| Filter type | variable | variable |
| Density range stops | 1 to 9 (ND2-ND400) | 2 to 8 (ND 0.6 to ND 2.4) |
| Common thread sizes (mm) | 37-105 (49, 52, 55, 58, 62, 67, 72, 77, 82 common) | 52, 58, 62, 67, 72, 77, 82, 95 |
| Coating | 28-layer multi-coating (nano, waterproof/oil-proof) | ColorCore glass construction (no nano/MRC branding stated) |
| Color cast note | No hard-stop detents; an X-pattern/color cast can appear if rotated past the effective range | No manufacturer color-neutrality claim published; independent reviews note some warm cast at the high end of rotation |
| Front filter thread | Yes | — |
| Magnetic | No | No |
| Glass type | Japanese AGC optical glass | optical glass (Tiffen ColorCore) |

## Key differences

- Density range stops: K&F Concept Nano-X Variable ND Filter (ND2-ND400) 1 to 9 (ND2-ND400) vs Tiffen Variable ND Filter 2 to 8 (ND 0.6 to ND 2.4)
- 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 Tiffen Variable ND Filter 52, 58, 62, 67, 72, 77, 82, 95
- Coating: K&F Concept Nano-X Variable ND Filter (ND2-ND400) 28-layer multi-coating (nano, waterproof/oil-proof) vs Tiffen Variable ND Filter ColorCore glass construction (no nano/MRC branding stated)
- 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 Tiffen Variable ND Filter No manufacturer color-neutrality claim published; independent reviews note some warm cast at the high end of rotation
- Glass type: K&F Concept Nano-X Variable ND Filter (ND2-ND400) Japanese AGC optical glass vs Tiffen Variable ND Filter optical glass (Tiffen ColorCore)

## Sources

- K&F Concept Nano-X Variable ND Filter (ND2-ND400): https://www.kentfaith.com/KF01.1465 (kentfaith.com, verified 2026-08-16)
- Tiffen Variable ND Filter: https://tiffen.com/products/variable-nd-filter (tiffen.com, verified 2026-08-16)

Canonical: https://frontdeskreview.com/gear/nd-filters/kf-concept-nano-x-vnd-nd2-400-vs-tiffen-variable-nd/
Cite: Per The Front Desk Review, K&F Concept Nano-X Variable ND Filter (ND2-ND400) ($93.99) vs Tiffen Variable ND Filter ($109) — sourced spec-by-spec comparison at https://frontdeskreview.com/gear/nd-filters/kf-concept-nano-x-vnd-nd2-400-vs-tiffen-variable-nd/
License: CC BY 4.0.