Takahashi TKA00442: Collimation Tube for the Newton Epsilon

Center the midpoint of an Epsilon

The TKA00442 tube is designed for adjusting the secondary mirror on Takahashi Newtonian telescopes, particularly the Epsilon models with hyperbolic mirrors. Its crosshair reticle serves as a reference point aligned with the markings on the secondary mirror. It does not, by itself, replace the entire collimation procedure.

A Special Mechanical Connection

The mounting assembly uses an M36.4×1 male thread. The tube screws onto the No. 14 input ring of the Epsilon 31.75 mm eyepiece holder. It is therefore not simply an accessory that can be inserted into just any 31.75 mm slip-on mount. The instrument’s configuration diagram allows you to verify the connection.

To be used with the collimation eyepiece

Takahashi recommends using this product in combination with the TKA00441 collimation eyepiece for complete collimation. The manufacturer advises against using this product on instruments other than Epsilon models due to specific optical and mechanical requirements. This caution applies even when a connector with a similar diameter appears to be available.

Technical specifications

Components of this item

TKA00442 collimation tube with a wire crosshair. The TKA00441 eyepiece required for full collimation is a separate item and is not listed as included.

Reference: TKA00442. Takahashi's Official Profile.