{
    "type": "product",
    "name": "Contax RF Biogon 21mm/f4.5",
    "url": "https://www.cameraworth.com/c/contax/rf-biogon-21mm-f4-5/",
    "brand": {
        "name": "Contax",
        "url": "https://www.cameraworth.com/c/contax/"
    },
    "answer": "The Contax RF Biogon 21mm/f4.5 sells for about £337 (median of only 4 recorded sales, 2005–2020; indicative, old).",
    "figure": {
        "grade": "indicative",
        "grade_label": "Indicative",
        "modifiers": [
            "old"
        ],
        "n": 4,
        "median_gbp": 337,
        "middle_half_gbp": null,
        "period": [
            "2005-05-21",
            "2020-11-21"
        ],
        "last_3_years": null,
        "pools": null,
        "one_sale_moves_this": {
            "without_lowest": 400,
            "without_flagged": null,
            "without_highest": 274
        },
        "extras": {
            "median_usd": 512,
            "median_eur": 427,
            "note": "USD and EUR from each sale converted at its month’s ECB rate"
        },
        "basis": "Auction hammer prices with the buyer’s premium removed; eBay as sold"
    },
    "reason": null,
    "versions": [],
    "set_apart": [],
    "version_status": null,
    "book_guide": null,
    "sales_shown": [
        {
            "id": 10883,
            "date": "2020-11-21",
            "venue": "Leitz Photographica Auction",
            "title": "Carl Zeiss f. Contax Biogon 4.5/21mm",
            "price": 200,
            "currency": "EUR",
            "gbp": 179,
            "basis": "hammer",
            "version": null,
            "version_status": null,
            "in_typical_price": true,
            "set_apart": null,
            "flags": [
                "title_miss"
            ],
            "source_url": "https://www.leitz-auction.com/en/Carl-Zeiss-f.-Contax-Biogon-4.5-21mm/AI-37-38418",
            "lot": "AI_37_38418"
        },
        {
            "id": 42820,
            "date": "2018-11-01",
            "venue": "Flints Auctions",
            "title": "A Carl Zeiss Biogon f/4.5 21mm Lens",
            "price": 480,
            "currency": "GBP",
            "gbp": 400,
            "basis": "premium_inclusive",
            "version": null,
            "version_status": null,
            "in_typical_price": true,
            "set_apart": null,
            "flags": [
                "title_miss"
            ],
            "source_url": null,
            "lot": "1164"
        },
        {
            "id": 49684,
            "date": "2012-05-12",
            "venue": "Leitz Photographica Auction",
            "title": "Carl Zeiss Biogon 4.5/21mm Prototype",
            "price": 2200,
            "currency": "EUR",
            "gbp": 1768,
            "basis": "hammer",
            "version": null,
            "version_status": null,
            "in_typical_price": true,
            "set_apart": null,
            "flags": [
                "title_miss"
            ],
            "source_url": "https://www.leitz-auction.com/en/Carl-Zeiss-Biogon-4.5-21mm-Prototype/AI-21-13814",
            "lot": "AI_21_13814"
        },
        {
            "id": 42467,
            "date": "2005-05-21",
            "venue": "Leitz Photographica Auction",
            "title": "Carl Zeiss   Biogon 4.5/21mm",
            "price": 400,
            "currency": "EUR",
            "gbp": 274,
            "basis": "hammer",
            "version": null,
            "version_status": null,
            "in_typical_price": true,
            "set_apart": null,
            "flags": [
                "title_miss"
            ],
            "source_url": "https://www.leitz-auction.com/en/Carl-Zeiss-Biogon-4.5-21mm/AI-7-24931",
            "lot": "AI_7_24931"
        }
    ],
    "sales_ledger": "https://www.cameraworth.com/c/contax/rf-biogon-21mm-f4-5/sales/",
    "citation": "“Contax RF Biogon 21mm/f4.5: about £337, the median of 4 recorded sales, 2005–2020 (Indicative, method v1).” cameraworth.com, retrieved 8 October 2026. https://www.cameraworth.com/c/contax/rf-biogon-21mm-f4-5/",
    "method": {
        "version": 1,
        "url": "https://www.cameraworth.com/methodology/"
    },
    "computed_at": "2026-10-08 00:10:00.968880",
    "attribution": "Data from cameraworth.com — a public register of what cameras and lenses actually sold for. Cite the page URL and the retrieval date; see /methodology/ for how each figure is made."
}