{
  "slug": "sigma-20-2-dgdn",
  "name": "20mm F2 DG DN | Contemporary",
  "category": "lens",
  "specs": {
    "maker": "シグマ",
    "released": "2022-02",
    "mount": "ソニーE / ライカL",
    "format": "フルフレーム",
    "focal_length": "20mm",
    "max_aperture": "f/2",
    "elements": "11群13枚",
    "blades": 9,
    "min_focus_m": 0.22,
    "max_magnification": "0.15倍",
    "stabilization": "なし",
    "filter_mm": 62,
    "weight_g": 370,
    "size_mm": "70x74.4",
    "price_range": "約6万円前後"
  },
  "summary": "金属鏡筒のIシリーズに属するContemporaryラインの超広角20mm。開放F2の明るさと370gの軽さを両立し、風景からスナップ、動画のジンバル運用まで幅広く使える。FLD1枚・SLD1枚・非球面3枚で歪曲や倍率色収差を補正している。",
  "amazon_query": "シグマ 20mm F2 DG DN Contemporary ソニーE",
  "construction_url": "https://www.sigma-global.com/jp/lenses/c022_20_2_re/?tab=construction",
  "mtf_url": "https://www.sigma-global.com/jp/lenses/c022_20_2_re/?tab=construction",
  "source_url": "https://www.sigma-global.com/jp/lenses/c022_20_2_re/",
  "retrieved_at": "2026-07-24",
  "product_url": "https://www.sigma-global.com/jp/lenses/c022_20_2_re/"
}