{
 "version": "2026-10-20",
 "license": "Dimension sheets are written by Xem Studio from the cited sources and are free to use (CC BY 4.0, attribute 'Xem Studio'). Linked files belong to their publishers under the license shown; Xem Studio does not host them. 'license_verified: false' means the license shown is from memory or the publisher's page as last read and should be confirmed at the link before commercial use.",
 "slug": "fpv-cameras-and-air-units",
 "name": "FPV camera sizes (nano 14, micro 19, mini 22, full 28 mm) and DJI O3 / O4 air unit dimensions",
 "kind": "modern",
 "category": "Electronics",
 "group": "RC & drones",
 "year": null,
 "question": "What size is a micro FPV camera?",
 "tags": [
  "fpv",
  "camera",
  "dji o4",
  "dji o3",
  "vtx",
  "rc plane",
  "rc car"
 ],
 "aliases": [
  "micro fpv camera size",
  "19mm fpv camera",
  "dji o4 dimensions",
  "dji o3 air unit dimensions",
  "fpv camera mount 3d print"
 ],
 "overall_mm": {
  "length": null,
  "width": null,
  "height": null
 },
 "official_cad": false,
 "xem_status": "free-files",
 "les": false,
 "free_files": 5,
 "url": "https://xemstudio.com/objects/fpv-cameras-and-air-units/",
 "sheet_txt": "https://xemstudio.com/objects/fpv-cameras-and-air-units/sheet.txt",
 "sheet": {
  "basis": "DJI specs; camera makers' pages via dealers; mount holes for O4 Pro from a maker review",
  "overall_mm": {
   "length": null,
   "width": null,
   "height": null
  },
  "notes": [
   "Camera body classes by front width: nano 14 × 14 (Caddx Ant), micro 19 × 19 (Caddx Ratel 2, 19 × 19 × 20), mini 22 × 22, full 28 × 28 (mini cameras often ship with a 28 mm adapter).",
   "Side M2 screw positions are not published for these cameras, so the cages have slots instead of holes.",
   "DJI O4 Air Unit Pro: camera 25.55 × 20 × 23.3, VTX 33.5 × 33.5 × 13 (32 g with camera); VTX M2 threads on 20 × 20 and 25.5 × 25.5, camera 2 × M2 16 apart (maker review). DJI O4 (lite): camera 13.44 × 12.36 × 16.5, VTX 30 × 30 × 6.",
   "DJI O3 Air Unit: VTX 32.5 × 30.5 × 14.5, camera 21.2 × 20 × 19.5, 25.5 × 25.5 mount. Planes and cars: use the 19 or 22 cage on a tilt plate; vibration-isolate with TPU."
  ],
  "table": {
   "columns": [
    "unit",
    "camera_mm",
    "vtx_mm",
    "mount",
    "weight_g"
   ],
   "rows": [
    [
     "nano class (Caddx Ant)",
     "14 × 14",
     null,
     null,
     2
    ],
    [
     "micro class (Caddx Ratel 2)",
     "19 × 19 × 20",
     null,
     null,
     5.9
    ],
    [
     "mini class (Foxeer Predator 5 Mini)",
     "22 × 22",
     null,
     "28 mm adapter",
     8.7
    ],
    [
     "DJI O4 Air Unit Pro",
     "25.55 × 20 × 23.3",
     "33.5 × 33.5 × 13",
     "20 × 20 and 25.5 × 25.5 M2",
     32
    ],
    [
     "DJI O4 Air Unit",
     "13.44 × 12.36 × 16.5",
     "30 × 30 × 6",
     null,
     8.2
    ],
    [
     "DJI O3 Air Unit",
     "21.2 × 20 × 19.5",
     "32.5 × 30.5 × 14.5",
     "25.5 × 25.5",
     36.4
    ],
    [
     "ELRS nano receiver (BetaFPV)",
     null,
     "12 × 19",
     null,
     0.7
    ],
    [
     "VTX (Rush Tank Ultimate Mini)",
     null,
     "28 × 28 × 3.3",
     "20 × 20",
     4.46
    ]
   ]
  }
 },
 "sheet_text": "FPV camera sizes (nano 14, micro 19, mini 22, full 28 mm) and DJI O3 / O4 air unit dimensions — dimension sheet\nSource: Xem Studio, https://xemstudio.com/objects/fpv-cameras-and-air-units/  (CC BY 4.0)\nBasis: DJI specs; camera makers' pages via dealers; mount holes for O4 Pro from a maker review\nCatalog version: 2026-10-20\n\nSizes: see table below\n- Camera body classes by front width: nano 14 × 14 (Caddx Ant), micro 19 × 19 (Caddx Ratel 2, 19 × 19 × 20), mini 22 × 22, full 28 × 28 (mini cameras often ship with a 28 mm adapter).\n- Side M2 screw positions are not published for these cameras, so the cages have slots instead of holes.\n- DJI O4 Air Unit Pro: camera 25.55 × 20 × 23.3, VTX 33.5 × 33.5 × 13 (32 g with camera); VTX M2 threads on 20 × 20 and 25.5 × 25.5, camera 2 × M2 16 apart (maker review). DJI O4 (lite): camera 13.44 × 12.36 × 16.5, VTX 30 × 30 × 6.\n- DJI O3 Air Unit: VTX 32.5 × 30.5 × 14.5, camera 21.2 × 20 × 19.5, 25.5 × 25.5 mount. Planes and cars: use the 19 or 22 cage on a tilt plate; vibration-isolate with TPU.\n\nunit  camera_mm  vtx_mm  mount  weight_g\nnano class (Caddx Ant)  14 × 14  None  None  2\nmicro class (Caddx Ratel 2)  19 × 19 × 20  None  None  5.9\nmini class (Foxeer Predator 5 Mini)  22 × 22  None  28 mm adapter  8.7\nDJI O4 Air Unit Pro  25.55 × 20 × 23.3  33.5 × 33.5 × 13  20 × 20 and 25.5 × 25.5 M2  32\nDJI O4 Air Unit  13.44 × 12.36 × 16.5  30 × 30 × 6  None  8.2\nDJI O3 Air Unit  21.2 × 20 × 19.5  32.5 × 30.5 × 14.5  25.5 × 25.5  36.4\nELRS nano receiver (BetaFPV)  None  12 × 19  None  0.7\nVTX (Rush Tank Ultimate Mini)  None  28 × 28 × 3.3  20 × 20  4.46\n\nFiles elsewhere (not hosted by Xem Studio; license as stated by the publisher):\n- DJI: O4 Air Unit specs — web — Publisher's page; dimensions are facts — https://dji.com/o4-air-unit/specs\n- Unmanned Tech blog (maker review): DJI O4 technology review — web — Publisher's page; dimensions are facts — https://blog.unmanned.tech/dji-o4-fpv-technology-review/\n- GetFPV (DJI spec): DJI O3 Air Unit — web — Publisher's page; dimensions are facts — https://www.getfpv.com/dji-o3-air-unit.html\n- ReadyMadeRC (Caddx spec): Caddx Ant — web — Publisher's page; dimensions are facts — https://www.readymaderc.com/products/details/caddx-ant-fpc-camera\n- Unmanned Tech (Caddx spec): Caddx Ratel 2 — web — Publisher's page; dimensions are facts — https://www.unmannedtechshop.co.uk/products/caddx-ratel-2-1200tvl-fpv-camera-2-1mm\n- Rotorama (Foxeer spec): Foxeer Predator 5 Mini — web — Publisher's page; dimensions are facts — https://www.rotorama.com/kamery/foxeer-predator-v5-mini\n- BetaFPV: ELRS Nano receiver — web — Publisher's page; dimensions are facts — https://betafpv.com/collections/expresslrs-series/products/elrs-nano-receiver\n\nFree files (CC BY 4.0, Xem Studio; STEP + STL, 5 parts): https://xemstudio.com/files/hardware/fpv-cameras-and-air-units/index.json\nAPI: https://xemstudio.com/api/geometry?object=fpv-cameras-and-air-units\n",
 "sources": [
  {
   "publisher": "DJI",
   "title": "O4 Air Unit specs",
   "url": "https://dji.com/o4-air-unit/specs",
   "formats": [
    "web"
   ],
   "license": "Publisher's page; dimensions are facts",
   "license_verified": true,
   "hosted": false
  },
  {
   "publisher": "Unmanned Tech blog (maker review)",
   "title": "DJI O4 technology review",
   "url": "https://blog.unmanned.tech/dji-o4-fpv-technology-review/",
   "formats": [
    "web"
   ],
   "license": "Publisher's page; dimensions are facts",
   "license_verified": true,
   "hosted": false
  },
  {
   "publisher": "GetFPV (DJI spec)",
   "title": "DJI O3 Air Unit",
   "url": "https://www.getfpv.com/dji-o3-air-unit.html",
   "formats": [
    "web"
   ],
   "license": "Publisher's page; dimensions are facts",
   "license_verified": true,
   "hosted": false
  },
  {
   "publisher": "ReadyMadeRC (Caddx spec)",
   "title": "Caddx Ant",
   "url": "https://www.readymaderc.com/products/details/caddx-ant-fpc-camera",
   "formats": [
    "web"
   ],
   "license": "Publisher's page; dimensions are facts",
   "license_verified": true,
   "hosted": false
  },
  {
   "publisher": "Unmanned Tech (Caddx spec)",
   "title": "Caddx Ratel 2",
   "url": "https://www.unmannedtechshop.co.uk/products/caddx-ratel-2-1200tvl-fpv-camera-2-1mm",
   "formats": [
    "web"
   ],
   "license": "Publisher's page; dimensions are facts",
   "license_verified": true,
   "hosted": false
  },
  {
   "publisher": "Rotorama (Foxeer spec)",
   "title": "Foxeer Predator 5 Mini",
   "url": "https://www.rotorama.com/kamery/foxeer-predator-v5-mini",
   "formats": [
    "web"
   ],
   "license": "Publisher's page; dimensions are facts",
   "license_verified": true,
   "hosted": false
  },
  {
   "publisher": "BetaFPV",
   "title": "ELRS Nano receiver",
   "url": "https://betafpv.com/collections/expresslrs-series/products/elrs-nano-receiver",
   "formats": [
    "web"
   ],
   "license": "Publisher's page; dimensions are facts",
   "license_verified": true,
   "hosted": false
  }
 ],
 "xem": {
  "status": "free-files",
  "sheet_free": true,
  "mesh_price_usd": null,
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  "tolerance_mm": null
 },
 "related": [
  "fc-esc-stack-mounts",
  "fpv-drone-motors",
  "rc-servos"
 ],
 "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": "How big is a micro FPV camera?",
   "a": "19 × 19 mm at the front (about 19 × 19 × 20)."
  },
  {
   "q": "How big is the DJI O4 Air Unit Pro?",
   "a": "Camera 25.55 × 20 × 23.3, VTX 33.5 × 33.5 × 13 mm."
  }
 ],
 "files_license": null,
 "offers": [
  {
   "file": "camera-cage-14mm",
   "formats": [
    "step",
    "stl"
   ],
   "price_usd": 0,
   "license": "CC BY 4.0 (Xem Studio)",
   "step": "https://xemstudio.com/files/hardware/fpv-cameras-and-air-units/camera-cage-14mm.step",
   "stl": "https://xemstudio.com/files/hardware/fpv-cameras-and-air-units/camera-cage-14mm.stl",
   "note": "Side-plate cage for 14 mm FPV cameras: M2 slots for the side screws (any position), 2 × M3 base"
  },
  {
   "file": "camera-cage-19mm",
   "formats": [
    "step",
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   "license": "CC BY 4.0 (Xem Studio)",
   "step": "https://xemstudio.com/files/hardware/fpv-cameras-and-air-units/camera-cage-19mm.step",
   "stl": "https://xemstudio.com/files/hardware/fpv-cameras-and-air-units/camera-cage-19mm.stl",
   "note": "Side-plate cage for 19 mm FPV cameras: M2 slots for the side screws (any position), 2 × M3 base"
  },
  {
   "file": "camera-cage-22mm",
   "formats": [
    "step",
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   "price_usd": 0,
   "license": "CC BY 4.0 (Xem Studio)",
   "step": "https://xemstudio.com/files/hardware/fpv-cameras-and-air-units/camera-cage-22mm.step",
   "stl": "https://xemstudio.com/files/hardware/fpv-cameras-and-air-units/camera-cage-22mm.stl",
   "note": "Side-plate cage for 22 mm FPV cameras: M2 slots for the side screws (any position), 2 × M3 base"
  },
  {
   "file": "camera-body-19x19x20",
   "formats": [
    "step",
    "stl"
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   "license": "CC BY 4.0 (Xem Studio)",
   "step": "https://xemstudio.com/files/hardware/fpv-cameras-and-air-units/camera-body-19x19x20.step",
   "stl": "https://xemstudio.com/files/hardware/fpv-cameras-and-air-units/camera-body-19x19x20.stl",
   "note": "Micro 19 mm FPV camera body envelope 19 × 19 × 20"
  },
  {
   "file": "dji-o4-pro-camera-25.55x20x23.3",
   "formats": [
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   "license": "CC BY 4.0 (Xem Studio)",
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   "stl": "https://xemstudio.com/files/hardware/fpv-cameras-and-air-units/dji-o4-pro-camera-25.55x20x23.3.stl",
   "note": "DJI O4 Air Unit Pro camera envelope 25.55 × 20 × 23.3"
  }
 ],
 "markdown": "https://xemstudio.com/objects/fpv-cameras-and-air-units/index.md"
}