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  "path": "/en/3d-model/tool/m48-to-m42-t2-telescope-camera-adapter-step-blueprint",
  "publishedAt": "2026-05-25T08:27:21.000Z",
  "site": "https://cults3d.com",
  "tags": [
    "tool"
  ],
  "textContent": "Strictly engineered for CNC turning and milling. This is a mathematically perfect digital blueprint (`.STEP` format) for an M48x0.75 to M42x0.75 (T2) male-to-male optical adapter. \n\nWhen mounting heavy, expensive cooled astrophotography cameras and filter wheels, 3D-printed plastic threads can flex or shear off. This `.STEP` file allows you to load the geometry directly into your CAM software to turn a permanent, structurally rigid adapter out of billet aluminum or brass.\n\n**Engineering Specifications:**\n* **Side A:** M48 x 0.75mm (Standard 2-inch filter thread) | 5.0mm length\n* **Side B:** M42 x 0.75mm (Standard T2 thread) | 5.0mm length\n* **Central Flange:** 52.0mm Outer Diameter with a 3.0mm thickness to allow for a secure grip or physical knurling on the lathe.\n* **Clear Aperture:** 38.0mm internal diameter to prevent sensor vignetting on APS-C and full-frame chips.\n* **Thread Starts:** 0.5mm chamfers applied to both thread leading edges for seamless engagement.\n\n**File Format:**\n* Includes `.STEP` file ONLY. \n* *Note: This asset is modeled to exact nominal dimensions with zero FDM slicer shrink-offsets applied. It is not intended for standard FDM 3D printing.*",
  "title": "M48 to M42 (T2) Telescope Camera Adapter | STEP Blueprint"
}