Astronomy Specialist



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The Baader ClickLock© System is a precise accessory clamp without locking screws. The eyepiece, diagonal or accessory used is held without the inconvenience of the thumbs screws which causes tilt and therefore changes the collimation of the optical system.

This model fits on M42 (T2) male threads and holds 1.25" accessories.

Standard eyepiece holders use thumb screws to hold the accessory in place. While tightening, these screws turn the accessory and therefore alter the collimation. You can notice this effect with a laser collimator: the more you tighten the thumb screws, the more the laser dot will move across the mirror. If you repeat this test, the laser dot will move to another position so the collimation can never be precise. 

The Baader ClickLock secures your 1.25" accessories using its clamping system that holds the part at three sides, thus not introduces tilting movements.

The Baader ClickLock© System at a glance:

  • A 20° rotation of the external collar is sufficient to securely hold 1.25" accessories while staying safe and firm.
  • The compression ring holds your most expensive accessory without leaving scratches and marks on the barrels.
  • The top ring of the adapter works like a micro focuser, one turn moves the accessory of only 0.5mm. The maximum excursion is 6mm.


Baader Click Lock System


Connection on telescope side

Female M42 x 0.75 (T2)

Connection on eyepiece side

1.25" and M42 male (under top ring)

Optical length

32 mm to 38 mm

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