{"updated": "2026-09-19", "mount": "canon-rf", "slug": "canon-rf400mm-f2-8-l-is-usm", "name": "RF400mm F2.8 L IS USM", "maker": "キヤノン", "model": "", "band": "tele", "specs": {"メーカー": "キヤノン", "焦点距離": "400mm", "開放F値": "F2.8", "レンズタイプ": "単焦点・大口径超望遠レンズ", "対応マウント": "キヤノン RF", "フォーマット": "フルサイズ対応", "フォーカス": "AF/MF", "手ブレ補正": "○", "最短撮影距離": "2.5m", "最大撮影倍率": "0.17倍", "フィルター径": "52mm", "最大径×長さ": "163x367mm", "重さ": "2890g", "防塵・防滴": "防塵・防滴", "発売日": "2021/7/15"}, "today": {"date": "2026-09-19", "rakuten": 1890000, "yahoo": null, "cheapest": 1890000, "cheapest_mall": "r"}, "history": [{"date": "2026-09-15", "rakuten": 1890000, "yahoo": null}, {"date": "2026-09-16", "rakuten": 1890000, "yahoo": null}, {"date": "2026-09-17", "rakuten": 1890000, "yahoo": null}, {"date": "2026-09-18", "rakuten": 1890000, "yahoo": null}, {"date": "2026-09-19", "rakuten": 1890000, "yahoo": null}], "license": "CC BY 4.0（数値）", "method": "lens.match の規則で確かめた出品の最安。推定なし", "page": "https://kurashigram.com/lens/canon-rf/canon-rf400mm-f2-8-l-is-usm/"}