{
  "slug": "sigma-17-4-dgdn",
  "name": "17mm F4 DG DN | Contemporary",
  "category": "lens",
  "specs": {
    "maker": "シグマ",
    "released": "2023-04",
    "mount": "ソニーE / ライカL",
    "format": "フルフレーム",
    "focal_length": "17mm",
    "max_aperture": "f/4",
    "elements": "8群9枚",
    "blades": 7,
    "min_focus_m": 0.12,
    "max_magnification": "0.28倍",
    "stabilization": "なし",
    "filter_mm": 55,
    "weight_g": 220,
    "size_mm": "64x50.8",
    "price_range": "約8万円前後"
  },
  "summary": "金属外装のコンパクト単焦点群「Iシリーズ」の最広角となるContemporaryラインの17mm。全長50.8mm・220gの小型軽量ボディに最短12cm・最大撮影倍率0.28倍の近接性能を詰め込んでいる。フルサイズミラーレスの常用超広角として、スナップや風景の持ち歩きに向く。",
  "amazon_query": "シグマ 17mm F4 DG DN Contemporary ソニーE",
  "construction_url": "https://www.sigma-global.com/jp/lenses/c023_17_4_re/?tab=construction",
  "mtf_url": "https://www.sigma-global.com/jp/lenses/c023_17_4_re/?tab=construction",
  "source_url": "https://www.sigma-global.com/jp/lenses/c023_17_4_re/",
  "retrieved_at": "2026-07-24",
  "product_url": "https://www.sigma-global.com/jp/lenses/c023_17_4_re/"
}