For telescopes with 2" focusser

Lunt Solar Systems currently offers 4 blocking filter apertures for use with our Etalon systems. The Blocking Filter houses additional filters which are required for the safety and performance of the solar package.

Blocking filter required on all Solar Systems.

We are currently offering the B600d, B1200d and B1800d in a T2-M42 x 0.75 diagonal format with fixed filter. The B600s, B1200s, B1800s and B3400s is also being offered in a 2" straight thru with a tiltable filter mechanism.

The B600 is for maximum focal length 540mm, B1200 is for 1080mm, B1800 is for 1620mm and the B3400 is for 2880 mm maximum focal length. This is the focal length of telescope for which that particular blocking filter will provide a full disk image of the Sun. A blocking filter larger than that required to achieve the full disk image may result in image "ghosts" at the edge of the field of view.

Lunt Solar blocking filters contain a unique filter system. We can only warranty safety or performance when blocking filter is paired with a Lunt Solar System.

Pre-orders will be shipped in the order they are received.