Blocking filter in straight extension tube for telescopes up to 3060 mm focal length. Can only be used in combination with a LUNT H-alpha filter or a LUNT H-alpha telescope!
Lunt Solar Systems offers blocking filters in various sizes, and optionally in 90° diagonal mirror housings or straight extension tubes. You can choose which blocking filter you want to use with your LUNT H-Alpha Etalon System.
The B3400 is built into a straight extension tube, with a 2" focuser mount on the telescope side and a 2" eyepiece holder and adaptor for 1.25" eyepieces on the eyepiece side. The B3400 can be used on LUNT H-Alpha systems with a telescope focal length of up to 3060 mm.
The blocking filter cannot be used without an additional H-alpha filter system from Lunt Solar Systems! Blocking filters are absolutely necessary to ensure the safety and functionality of an H-alpha telescope for solar observation. Lunt Solar Systems blocking filters form a unique filter system. We can only guarantee your safety and the functionality of your telescope if the blocking filter is used together with an original H-alpha filter or H-alpha telescope from Lunt Solar Systems.
