# 📐 L2 Spec — Multi-Focus Fusion Mismatch-Only Spec
**ID:** `L2-076-001` · **Status:** ⊙ Testnet (genesis catalog)
**Parents:** ⬆ Principle [`L1-076`](/artifact/l1/L1-076)
> **🎯 Tolerance (ε):** expression
> **⚖ Difficulty score:** 0.52 · **Delta tier:** 5
> **⛓ On-chain block:** 41554173
---
## 1. Domain Ω
**Type:** `range`
| Parameter | Unit | Range |
|---|---|---|
| H | px | 256 – 8192 |
| W | px | 256 – 8192 |
| K frames | — | 2 – 32 |
| Parallax px | — | 0.0 – 30.0 |
| Motion ghosting | — | 0.0 – 0.5 |
| Chromatic fringing | — | 0.0 – 2.0 |
| Exposure variation | — | 0.0 – 2.0 |
| Registration error | — | 0.0 – 5.0 |
## 2. Tolerance (ε)
**Type:** `fn`
```
22.0 + 4.0 * log2(K_frames / 2) - 3.0 * registration_error / 5.0 - 5.0 * motion_ghosting
```
## 3. Difficulty
| Property | Value |
|---|---|
| Difficulty score | 0.52 |
| Delta tier | 5 |
## 4. Fingerprint
`0cc722ecefd2cb462d252af47085f0db7af7773e39c534cd1c878ba529824902`
## 5. On-chain Registration
- **Chain hash:** `0x70d0d1037943fc95a333771f36b81141c664efa574215596572fc593dc9f1956`
- **Chain tx hash:** `0x92149e5f01076469a1716b3f059a208a057bc94de00034f5ad0a6be6644b2016`
- **Chain block:** `41554173`
---
## File Mapping
This bundle consists of: `L2-076-001.md`, `L2-076-001.json`.
| File | Role | How to regenerate |
|------|------|-------------------|
| `L2-076-001.md` | Source of truth — edit this | Human or LLM |
| `L2-076-001.json` | Structured metadata for the registry | LLM regenerates from the sections above |
**Prompt for your LLM after editing this Markdown:**
> Read the attached Markdown. Regenerate the sibling `.json` so every field matches.
> Preserve the schema documented in the rows above.
> Output each file in its own fenced code block tagged with the filename.
> Output only the JSON object.
_This Markdown was auto-synthesized from the catalog row for `L2-076-001`._
_Edit it, regenerate the JSON, and submit at [/submit](/submit) to claim the artifact._