# K&F Concept Nano-X Variable ND Filter (ND2-ND400) vs Hoya ProND EX 1000 (ND 3.0, 10-Stop): 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 Hoya ProND EX 1000 (ND 3.0, 10-Stop) (Hoya) among nd filters. Hoya ProND EX 1000 (ND 3.0, 10-Stop) is the cheaper of the two at $88.9.

## Side by side

| Spec | K&F Concept Nano-X Variable ND Filter (ND2-ND400) | Hoya ProND EX 1000 (ND 3.0, 10-Stop) |
| --- | --- | --- |
| US price | $93.99 | $88.9 |
| Brand | K&F Concept | Hoya |
| Released | 2023 | — |
| Filter type | variable | fixed |
| Density range stops | 1 to 9 (ND2-ND400) | 10 |
| Common thread sizes (mm) | 37-105 (49, 52, 55, 58, 62, 67, 72, 77, 82 common) | 49-82 |
| Coating | 28-layer multi-coating (nano, waterproof/oil-proof) | ACCU-ND multi-coating |
| Color cast note | No hard-stop detents; an X-pattern/color cast can appear if rotated past the effective range | HOYA's ACCU-ND technology is designed to equally reduce visible and IR light to prevent the color shift seen on cheaper ND filters |
| Front filter thread | Yes | Yes |
| Magnetic | No | No |
| Glass type | Japanese AGC optical glass | clear optical glass, aluminum frame |

## Key differences

- Filter type: K&F Concept Nano-X Variable ND Filter (ND2-ND400) variable vs Hoya ProND EX 1000 (ND 3.0, 10-Stop) fixed
- Density range stops: K&F Concept Nano-X Variable ND Filter (ND2-ND400) 1 to 9 (ND2-ND400) vs Hoya ProND EX 1000 (ND 3.0, 10-Stop) 10
- 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 Hoya ProND EX 1000 (ND 3.0, 10-Stop) 49-82
- Coating: K&F Concept Nano-X Variable ND Filter (ND2-ND400) 28-layer multi-coating (nano, waterproof/oil-proof) vs Hoya ProND EX 1000 (ND 3.0, 10-Stop) ACCU-ND multi-coating
- 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 Hoya ProND EX 1000 (ND 3.0, 10-Stop) HOYA's ACCU-ND technology is designed to equally reduce visible and IR light to prevent the color shift seen on cheaper ND filters
- Glass type: K&F Concept Nano-X Variable ND Filter (ND2-ND400) Japanese AGC optical glass vs Hoya ProND EX 1000 (ND 3.0, 10-Stop) clear optical glass, aluminum frame

## Sources

- K&F Concept Nano-X Variable ND Filter (ND2-ND400): https://www.kentfaith.com/KF01.1465 (kentfaith.com, verified 2026-08-16)
- Hoya ProND EX 1000 (ND 3.0, 10-Stop): https://hoyafilter.com/product/prond-ex/ (hoyafilter.com, verified 2026-08-16)

Canonical: https://frontdeskreview.com/gear/nd-filters/kf-concept-nano-x-vnd-nd2-400-vs-hoya-prond-ex-1000/
Cite: Per The Front Desk Review, K&F Concept Nano-X Variable ND Filter (ND2-ND400) ($93.99) vs Hoya ProND EX 1000 (ND 3.0, 10-Stop) ($88.9) — sourced spec-by-spec comparison at https://frontdeskreview.com/gear/nd-filters/kf-concept-nano-x-vnd-nd2-400-vs-hoya-prond-ex-1000/
License: CC BY 4.0.