{
  "slug": "sigma-300-600-f4-dg",
  "name": "300-600mm F4 DG OS | Sports",
  "category": "lens",
  "specs": {
    "maker": "シグマ",
    "released": "2025-05",
    "mount": "ソニーE / ライカL",
    "format": "フルフレーム",
    "focal_length": "300-600mm",
    "max_aperture": "f/4",
    "elements": "21群28枚",
    "blades": 13,
    "min_focus_m": 2.8,
    "max_magnification": "0.17倍（焦点距離470mm時）",
    "stabilization": "あり（OS2）",
    "weight_g": 3970,
    "size_mm": "167x469.9",
    "weather_sealed": "対応",
    "price_range": "約120万円前後"
  },
  "summary": "ズーム全域で開放F4を維持する世界初の大口径超望遠ズームで、Sports ラインの頂点に立つフラッグシップ。600mm F4単焦点に匹敵する描写と明るさにズームの自由度を加え、OS2手ブレ補正は5.5段の補正効果を持つ。前面フィルターは使えず40.5mmのドロップインフィルターホルダーを採用、プロスポーツや野生動物撮影の現場を狙った受注生産品。",
  "amazon_query": "シグマ 300-600mm F4 DG OS Sports ソニーE",
  "construction_url": "https://www.sigma-global.com/jp/lenses/s025_300_600_4/?tab=construction",
  "mtf_url": "https://www.sigma-global.com/jp/lenses/s025_300_600_4/?tab=construction",
  "source_url": "https://www.sigma-global.com/jp/lenses/s025_300_600_4/",
  "retrieved_at": "2026-07-24",
  "product_url": "https://www.sigma-global.com/jp/lenses/s025_300_600_4/"
}