I recently got a customized 3D print of Bahtinov mask done for my telescope. Thought of sharing this, as we don’t get this in India off-the-shelf.
- Install OpenSCAD into your PC/mac.
- Use this thingiverse 3D mask generator to configure for your telescope/camera’s focal length and aperture. Export an STL file, as per the instructions given.
- Order your 3d print online in https://print.3ding.in/upload
Mine costed ~Rs.1500 for a 6inch telescope, which is great deal.
- While configuring the 3D file, don’t opt for a center hole (for secondary mirror), rather leave it plain. As keeping a center hole creates a 3D file with a very thin rim for inner hole - the printing guys said it will break easily.
Attached a photo of the mask I got printed.