SIGMA20mmF1.4 人気 DG art フルサイズレンズ SONY Eマウントprice":51000,"description"レンズ(単焦点)display_order":50,"parent_category_id":97,"parent_category_name"家電・スマホ・カメラsize_group_id":17,"brand_group_id":9},"item_condition":{"id":4,"name"α Eマウント"},"item_brand":{"id":4199,"nam