{
  "slug": "sigma-28-70-f28-dgdn",
  "name": "28-70mm F2.8 DG DN | Contemporary",
  "category": "lens",
  "specs": {
    "maker": "シグマ",
    "released": "2021-03",
    "mount": "ソニーE / ライカL",
    "format": "フルフレーム",
    "focal_length": "28-70mm",
    "max_aperture": "f/2.8",
    "elements": "12群16枚",
    "blades": 9,
    "min_focus_m": 0.19,
    "max_magnification": "0.3倍（広角端）",
    "stabilization": "なし",
    "filter_mm": 67,
    "weight_g": 470,
    "size_mm": "72.2x103.5",
    "weather_sealed": "簡易対応",
    "price_range": "約8万円前後"
  },
  "summary": "F2.8通しの明るさをクラス最小最軽量の470gに凝縮した Contemporary ラインの標準ズーム。広角側を28mmに抑えることで大幅な小型化を実現し、フィルター径もφ67mmと扱いやすい。Art ラインの24-70mmより手頃な価格で、常用できる大口径標準ズームとしてコスパの高さが光る。",
  "amazon_query": "シグマ 28-70mm F2.8 DG DN Contemporary ソニーE",
  "construction_url": "https://www.sigma-global.com/jp/lenses/c021_28_70_28/?tab=construction",
  "mtf_url": "https://www.sigma-global.com/jp/lenses/c021_28_70_28/?tab=construction",
  "source_url": "https://www.sigma-global.com/jp/lenses/c021_28_70_28/",
  "retrieved_at": "2026-07-24",
  "product_url": "https://www.sigma-global.com/jp/lenses/c021_28_70_28/"
}