{
 "version": "2026-10-20",
 "license": "Dimension sheets: CC BY 4.0. Standard and published-size files: CC BY 4.0. Xem Studio's own designs (files_license = Xem Studio Design License): free to use and sell things from, not to redistribute as files — https://xemstudio.com/license/. Other publishers' files: their own license, linked beside them.",
 "slug": "nikon-z-mount",
 "name": "Nikon Z mount: 16 mm flange focal distance, 55 mm inner diameter",
 "kind": "standard",
 "category": "Cameras & lenses",
 "group": "Lens mounts & filter threads",
 "year": null,
 "question": "What is the Nikon Z flange focal distance and throat diameter?",
 "tags": [
  "lens mount",
  "camera",
  "lens",
  "mount",
  "adapter",
  "flange distance",
  "standard"
 ],
 "aliases": [
  "nikon z flange distance",
  "z mount inner diameter",
  "nikon z mount dimensions",
  "z mount 55mm",
  "ftz adapter thickness"
 ],
 "overall_mm": {
  "length": null,
  "width": null,
  "height": null
 },
 "official_cad": false,
 "xem_status": "not-scanned",
 "les": false,
 "free_files": 0,
 "url": "https://xemstudio.com/objects/nikon-z-mount/",
 "sheet_txt": "https://xemstudio.com/objects/nikon-z-mount/sheet.txt",
 "sheet": {
  "basis": "Published numbers only (sources per row); no bayonet geometry is published, so no file",
  "overall_mm": {
   "length": null,
   "width": null,
   "height": null
  },
  "notes": [
   "Flange focal distance is the distance from the mount's reference face to the image plane; adapters and extension tubes must add exactly the difference between two mounts' flange distances to keep infinity focus.",
   "Nikon's own figures: 55 mm inner diameter, 16 mm flange focal distance.",
   "No file: the bayonet's lug widths, angles, depths and locking geometry are not published by the maker, so nothing is drawn. Only the published numbers are given."
  ],
  "table": {
   "columns": [
    "parameter",
    "value",
    "from"
   ],
   "rows": [
    [
     "flange focal distance",
     "16 mm",
     "Nikon"
    ],
    [
     "throat / inner diameter",
     "55 mm (inner diameter)",
     "Nikon"
    ],
    [
     "coupling",
     "bayonet",
     "—"
    ]
   ]
  }
 },
 "sheet_text": "Nikon Z mount: 16 mm flange focal distance, 55 mm inner diameter — dimension sheet\nSource: Xem Studio, https://xemstudio.com/objects/nikon-z-mount/  (sheet CC BY 4.0)\nBasis: Published numbers only (sources per row); no bayonet geometry is published, so no file\nCatalog version: 2026-10-20\n\nSizes: see table below\n- Flange focal distance is the distance from the mount's reference face to the image plane; adapters and extension tubes must add exactly the difference between two mounts' flange distances to keep infinity focus.\n- Nikon's own figures: 55 mm inner diameter, 16 mm flange focal distance.\n- No file: the bayonet's lug widths, angles, depths and locking geometry are not published by the maker, so nothing is drawn. Only the published numbers are given.\n\nparameter  value  from\nflange focal distance  16 mm  Nikon\nthroat / inner diameter  55 mm (inner diameter)  Nikon\ncoupling  bayonet  —\n\nFiles elsewhere (not hosted by Xem Studio; license as stated by the publisher):\n- Nikon: Nikon Z series: Z mount system (55 mm inner diameter, 16 mm flange focal distance) — web — Publisher's page; dimensions are facts — https://www.nikonusa.com/learn-and-explore/c/products-and-innovation/nikon-z-series-z-mount-system\n- Wikipedia: Flange focal distance (table of mounts) — web — CC BY-SA 4.0 (text); dimensions are facts — https://en.wikipedia.org/wiki/Flange_focal_distance\n\nNo true-size file yet: the published figures do not fix the whole shape; a measured scan is planned.\nAPI: https://xemstudio.com/api/geometry?object=nikon-z-mount\n",
 "sources": [
  {
   "publisher": "Nikon",
   "title": "Nikon Z series: Z mount system (55 mm inner diameter, 16 mm flange focal distance)",
   "url": "https://www.nikonusa.com/learn-and-explore/c/products-and-innovation/nikon-z-series-z-mount-system",
   "formats": [
    "web"
   ],
   "license": "Publisher's page; dimensions are facts",
   "license_verified": true,
   "hosted": false
  },
  {
   "publisher": "Wikipedia",
   "title": "Flange focal distance (table of mounts)",
   "url": "https://en.wikipedia.org/wiki/Flange_focal_distance",
   "formats": [
    "web"
   ],
   "license": "CC BY-SA 4.0 (text); dimensions are facts",
   "license_verified": true,
   "hosted": false
  }
 ],
 "xem": {
  "status": "not-scanned",
  "sheet_free": true,
  "mesh_price_usd": null,
  "step_price_usd": null,
  "tolerance_mm": null
 },
 "related": [
  "nikon-f-mount",
  "sony-e-mount",
  "canon-rf-mount",
  "lens-filter-threads"
 ],
 "fits": [],
 "dimensions": "exact (nominal, no printing tolerance)",
 "dimension_rule": "All geometry on Xem Studio is exact (nominal, true size) with no printing tolerance. Where a part meets another part, the object lists its mating features (feature, exact size, what it mates with, fit class: press, slide, run, socket, clamp or designed). Apply your process's allowance to those features only; 'designed' gaps are part of the design and stay as drawn.",
 "mating": [],
 "faq": [
  {
   "q": "What is the Nikon Z flange distance?",
   "a": "16 mm, with a 55 mm inner diameter (Nikon)."
  },
  {
   "q": "How thick is an F-to-Z adapter?",
   "a": "F is 46.50 mm and Z 16 mm, so an adapter adds 30.5 mm."
  }
 ],
 "files_license": null,
 "offers": [],
 "markdown": "https://xemstudio.com/objects/nikon-z-mount/index.md"
}