At very cold temperatures, blocking filters may no longer work accurately central in the H-alpha wavelength, which means that the details on the sun become less visible.
The LS130THa/B3400 telescopes can be upgraded with this conversion kit. This allows to explore the Sun at different wavelengths with one and the same telescope ...
The Lunt Dovetail bar deluxe have the advantage of the stainless steel protected surface at side where the locking screw of the mount is touching the rail.