Hadley Eyepiece Holder (for the "Hadley Telescope - Official Metric")

Follow the original model for instructions.

I provide the .f3d which is just of modified version of the original.

Maturity

• Good.
• 4 prototypes.
• In use since 2025/11.

Differences to the original

Fits the official metric Hadley telescope (https://www.printables.com/model/268580-hadley-telescope-official-metric-remix). Then distance between mounting screws is 16mm.

Follows the design guides of the official metric Hadley telescope:

• Screw holes diameter: 4.7
• Nuts place: 7.2 x 3.6

I raised the position of the screw for the screw to touch the eyepieces in its small groove. This provides a better secure.

I intentionally let some plastic (1mm) between the screw and the eyepiece for a soft contact. Letting the screw touching the eyepiece marks it. I hope it will long a bit.

I removed some hard to print fillet.

To manually tighten the securing screws, you can use the thumbwheels I provide or use the ones from the original metric telescope (Matt Extra Parts - Thumbscrew Small - M4 hex nut).

Hardware is metric

• 4x M4x25 socket head cap screw. You need the screws to be 5mm longer than the original ones to fix to the middle assembly or bearing interface assembly.
• 4x M4x16 hex-head screw (ISO4017) (minimum 12) to secure the eye pieces in the holder.
• 4x M4 hex nut (ISO 4032) to secure the eye pieces in the holder.

Printing instruction

I printed this in PETG.

Log

• 2025/11/13 Initial release.