Thanks to the twin carbon fibre arms, which are 11 mm apart, the rigidity after assembly is similar to that of a metal mount with 5 mm diameter arms.

The carbon arms are only 0.4 mm thick. This means minimal obstruction and extremely fine, subtle spikes around the brightest stars. Diffraction effects caused by the mount remain minimal.

Do the double-arm mount produce diffraction spikes on stars?

Of course not! Once you have achieved precise focus, both spikes will merge into a single, very fine spike.

Double arms as a focusing aid:

Double arms are more sensitive to inaccurate focusing than a single arm. This makes it easier to focus on brighter stars. As soon as the peaks are clearly merged, focus has been achieved. Of course, all popular focusing aids, such as a Bahtinov mask, also work with this mount.

Features:

• Double carbon fibre arms for maximum stability and minimal diffraction
• Suitable for many secondary mirrors, e.g. from TS-Optics, Skywatcher or GSO
• With a central hole for M5 or M6 screws
• With threads for 4 collimation screws; 3 M4 screws are included
• Diameter from inner thread to inner thread: 342 mm – by using M5 screws of different lengths (not supplied), the mount can be adapted to tubes with an internal diameter of up to approximately 360 mm.

Scope of Delivery:

• TS-Optics Double Carbon Secondary Mirror Mount