Breakthrough Photography
Breakthrough Photography X4 Neutral Density
$139
Released 2017
Best Nd Filters · head-to-head
Breakthrough Photography X4 Neutral Density vs K&F Concept Nano-X Variable ND Filter (ND2-ND400)
A sourced, side-by-side comparison. K&F Concept Nano-X Variable ND Filter (ND2-ND400) is cheaper at $93.99. Every spec and price links to its source.
K&F Concept
K&F Concept Nano-X Variable ND Filter (ND2-ND400)
$93.99Cheaper
Released 2023
Which is better: the Breakthrough Photography X4 Neutral Density or K&F Concept Nano-X Variable ND Filter (ND2-ND400)?
On the specs we track, they're closely matched. The K&F Concept Nano-X Variable ND Filter (ND2-ND400) is the cheaper at $93.99.
See Breakthrough Photography X4 Neutral Density on Amazon See K&F Concept Nano-X Variable ND Filter (ND2-ND400) on Amazon
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Full spec sheet
✓ marks the stronger figure where "more" — or "less", for price and weight — is unambiguously better.
| Spec | Breakthrough Photography X4 Neutral Density | K&F Concept Nano-X Variable ND Filter (ND2-ND400) |
|---|---|---|
| US price | $139 | $93.99 |
| Brand | Breakthrough Photography | K&F Concept |
| Released | 2017 | 2023 |
| Filter type | fixed | variable |
| Density range stops | 3, 6, 10, or 15 (separate fixed-density SKUs) | 1 to 9 (ND2-ND400) |
| Common thread sizes (mm) | 39-112, plus 100mm/150mm square | 37-105 (49, 52, 55, 58, 62, 67, 72, 77, 82 common) |
| Coating | MRC16 (16-layer Multi-Resistant Coating) + Nanotec nano coating | 28-layer multi-coating (nano, waterproof/oil-proof) |
| Color cast note | Manufacturer states spectrally flat transmission targeting color-neutral results | No hard-stop detents; an X-pattern/color cast can appear if rotated past the effective range |
| Front filter thread | Yes | Yes |
| Magnetic | No | No |
| Glass type | SCHOTT B270 optical glass | Japanese AGC optical glass |
Sources — Breakthrough Photography X4 Neutral Density: breakthrough.photography (verified 2026-08-16). K&F Concept Nano-X Variable ND Filter (ND2-ND400): kentfaith.com (verified 2026-08-16).
What's the difference between the Breakthrough Photography X4 Neutral Density and K&F Concept Nano-X Variable ND Filter (ND2-ND400)?
Where the two actually differ on the specs we track (6 of 8). Matching specs are omitted.
- Filter type: Breakthrough Photography X4 Neutral Density fixed vs K&F Concept Nano-X Variable ND Filter (ND2-ND400) variable
- Density range stops: Breakthrough Photography X4 Neutral Density 3, 6, 10, or 15 (separate fixed-density SKUs) vs K&F Concept Nano-X Variable ND Filter (ND2-ND400) 1 to 9 (ND2-ND400)
- Common thread sizes (mm): Breakthrough Photography X4 Neutral Density 39-112, plus 100mm/150mm square vs K&F Concept Nano-X Variable ND Filter (ND2-ND400) 37-105 (49, 52, 55, 58, 62, 67, 72, 77, 82 common)
- Coating: Breakthrough Photography X4 Neutral Density MRC16 (16-layer Multi-Resistant Coating) + Nanotec nano coating vs K&F Concept Nano-X Variable ND Filter (ND2-ND400) 28-layer multi-coating (nano, waterproof/oil-proof)
- Color cast note: Breakthrough Photography X4 Neutral Density Manufacturer states spectrally flat transmission targeting color-neutral results vs 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
- Glass type: Breakthrough Photography X4 Neutral Density SCHOTT B270 optical glass vs K&F Concept Nano-X Variable ND Filter (ND2-ND400) Japanese AGC optical glass