2.00" Lunt Solar Systems B1800 Blocking Filter in extension tube with T2 and 2" connection
For best performance, be sure to pair your Lunt Solar Systems h-Alpha filter with the proper sized Lunt blocking filter.
A Blocking Filter is absolutely required for the safety and performance of telescopes for solar observing! The blocking filter will be mounted at the eyepiece-side of the telescope, and protect against the dangerous radiation from the sun.
The Blocking Filter B600 is for maximum focal length 600mm, B1200 is for 1200mm, B1800 is for 1800mm and the B3400 is for 3400 mm maximum focal length. This is the focal length of the telescope for which that particular blocking filter will provide a full disk image of the Sun. Choose your blocking filter carefully for your telescope's focal length!
Lunt Solar Systems blocking filters contain a unique filter system. Lunt can only warranty safety or performance when the correct blocking filter is paired with a Lunt Solar Systems Etalon system.
For telescopes with 2 inch eyepiece-holder
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 B600, B1200 and B1800 in a T2-M42 x 0.75 diagonal format with fixed filter.
The B1800 and B3200 is also being offered in a 2 inch 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 B3200 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. Lnt can only warranty safety or performance when blocking filter is paired with a Lunt Solar System.
â€¢ The T2-M42 x 0.75 diagonal series will be available in a straight thru option later in the year. There is currently no introductory date set.