{
  "taskId": "expansion-049",
  "slug": "macro-focus-pull-stationary-object",
  "language": "zh",
  "mode": "image-to-video",
  "modelId": "MiniMax-H3",
  "evidenceClass": "original-practice-method-not-model-tested",
  "input": {
    "path": "/learning-assets/pseo-expansion70-20261014/macro-focus-pull-stationary-object/first-frame.png",
    "editableSource": "/learning-assets/pseo-expansion70-20261014/macro-focus-pull-stationary-object/first-frame.svg",
    "role": "first_frame",
    "sourceType": "original-illustration"
  },
  "intent": {
    "cluster": "Historical close-up, camera and image-to-video prompt family",
    "historicalQueries": [
      "minimax h3 镜头特写提示词",
      "minimax h3 image to video",
      "minimax h3 camera commands"
    ],
    "evidenceRef": "docs/research/pseo-keyword-gap-2026-10-05/evidence/bing-live-keywords.csv",
    "distinctValue": "A one-time near-rim to far-collar focus handoff on a stationary ceramic sample, keeping object landmarks and framing fixed as sharpness changes.",
    "existingOwnerBoundary": [
      {
        "path": "/blog/camera-movement-prompts",
        "difference": "The broad page explains camera motion; this task fixes camera position and instead tests a single focus transition using two depth-separated landmarks."
      },
      {
        "path": "/blog/product-shape-consistency-video",
        "difference": "The exercise distinguishes blur from geometry changes with a supplied macro object, rather than repeating broad product-shape advice."
      }
    ],
    "demandClass": "historical-parent-query; exact long-tail demand unmeasured"
  },
  "title": "静物微距焦点交接：物体不动，只变清晰区域",
  "description": "在同一个静止陶瓷样件的近端圆口与后方凸环之间交接焦点，检查清晰度变化，避免推镜、变焦或变形冒充拉焦。",
  "goal": "摄影机与物体固定，在两个可见深度目标间交接一次焦点。原创插画是概念微距输入，不是H3实测光学或镜头控制结果。",
  "preparation": [
    "首帧应有深度不同且可辨认的两个特征。配套陶瓷样件提供近端圆口与更远凸环。",
    "起始近口比后环清楚；两处同样锐利时，难判断焦点是否发生变化。",
    "裁切稳定，保留可见桌面边或阴影，用来发现伪装成拉焦的机位推进或物体滑动。",
    "近远对焦是视觉指令，不虚构当前界面没有暴露的光圈、对焦距离或马达参数。"
  ],
  "prompt": "使用上传的微距构图。陶瓷样件完全静止放在桌面上，摄影机位置与构图锁定。开始时近处圆口清楚，后方凸环柔和模糊。焦点只缓慢交接一次，从近处圆口转到后方凸环：近边逐渐变软，后环逐渐更清楚。样件轮廓、两个开口、表面凸纹和接触阴影全过程固定；虚化只改变清晰度，不重新塑造物体。结尾停在后方凸环清楚的状态。不推镜，不变焦，不移动物体，不反复寻找焦点，不新增细节。",
  "steps": [
    {
      "title": "选定两个深度目标",
      "body": "运行前指出近口与后环，两处都应可见；提示词不能对来源从未展示的隐藏表面对焦。"
    },
    {
      "title": "固定几何与构图",
      "body": "把物体、机位和接触阴影设成固定。目标只是相对清晰度改变，不混入揭示、漂移或推进措辞。"
    },
    {
      "title": "在相同位置比较边缘清晰度",
      "body": "保存起始、过渡和结尾，在同一近口边缘与后环边缘对照。近处应变软、后处应清楚，参照结构的位置和形状不变。"
    },
    {
      "title": "拒绝靠重画来变清楚",
      "body": "确认结尾凸环只是更清楚，而非重新设计。凸纹增加或开口移位时，先降低焦点反差要求，或换后方结构更明确的素材。"
    }
  ],
  "acceptance": [
    "物体位置与构图全程固定。",
    "近处圆口是起始更清楚的目标。",
    "后方凸环成为结尾更清楚的目标。",
    "只进行一次清晰度交接，没有反复抽动。",
    "同一圆口、凸环和开口形状与相对位置不变。",
    "接触阴影保持相连，没有物体滑行。",
    "结尾稳定后焦，没有推近变焦或新增凸纹。"
  ],
  "troubleshooting": [
    {
      "symptom": "镜头推进代替拉焦",
      "change": "只将机位要求改成位置和构图锁定，去掉揭示或靠近措辞。"
    },
    {
      "symptom": "两处始终同样清楚",
      "change": "只把焦点反差写清：近清后虚，再近虚后清，保留静止构图。"
    },
    {
      "symptom": "后环清楚时形状也变了",
      "change": "更换后方结构可读性更高的素材，保留交接路线；锐化不能证明未知细节准确。"
    },
    {
      "symptom": "焦点反复抽动",
      "change": "只把结尾改成一次交接后保持后环清楚，去掉循环或反复呼吸式对焦措辞。"
    }
  ],
  "ending": "结尾后方凸环更清楚，样件仍处于原姿态。保存两个深度目标的同位置裁切，避免把移动或形变误判为拉焦。",
  "assetCaption": "原创概念微距插画，近处圆口清楚、后方凸环柔和；这是练习输入，不是镜头测试或生成结果。"
}