Focus adapter 2 inch for Pentax telescopes with 73 x 0.75 mm screw thread | Starlight

If you want to replace the focus ring on your Pentax telescope, the new focus ring must fit the connection that Pentax used. This focus adapter for Pentax telescopes with a 73 mm thread and a speed of 0.75 mm connects that connection to a 2-inch focus ring from Starlight Instruments. This way you can switch to a Feather Touch, which is known for its smooth movement.

Not all Pentax telescopes have the same connection. Therefore, before ordering, check that the threaded hole on your tube is actually 73 x 0.75 mm.

Pay attention to the focus point after assembly, because another focus lens can be slightly longer or shorter. If you work with a flat lens (flattener) or an astrocamera, Then check that the distance to the sensor is still correct.

Keep the original focus ring so you can return the telescope to its original condition later. Helps against dust and moisture in the open focus ring a fabric cover with a desiccant.