H-alpha Blocking Filters

Hydrogen-alpha Diagonal and Staight Thru
- in diagonal with T2 connection
- in extension tube with T2 and 2'' connection

( contact us directly or buy from dealer )

Blocking filters are required on all Solar Systems.

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.

B600 Blocking Filter in Diagonal with T2 connection
1.25" Price $299.00 Art. No. B600d1
2.0" Price $299.00 Art. No. B600d2

B600 Blocking Filter in extension tube with T2 and 2'' connection
1.25" Price $299.00 Art. No. B600s1
2.0" Price $299.00 Art. No. B600s2

B1200 Blocking Filter in Diagonal with T2 connection
1.25" Price $499.00 Art. No. B1200d1
2.0" Price $499.00 Art. No. B1200d2

B1200 Blocking Filter in extension tube with T2 and 2'' connection
1.25" Price $499.00 Art. No. B1200s1
2.0" Price $499.00 Art. No. B1200s2

B1800 Blocking Filter in Diagonal with T2 connection
1.25" Price $849.00 Art. No. B1800d1
2.0" Price $849.00 Art. No. B1800d2

B1800 Blocking Filter in extension tube with T2 and 2'' connection
1.25" Price $849.00 Art. No. B1800s1
2.0" Price $849.00 Art. No. B1800s2

Focal Length Specifications (Visual Use):
• B600 for Visual Use up to 600mm Focal Length Telescope
• B1200 for Visual Use up to 1200mm Focal Length Telescope
• B1800 for Visual Use up to 1800mm Focal Length Telescope
• B3400 (straight thru only) for visual Use up to 3400mm Focal Length Telescope

Focal Length Specifications (Imaging Use):

When imaging with a Lunt Solar System it is recommended that the user opt for the next larger Blocking Filter than that recommended for Visual use.
This is due to the fact that most Imaging Systems require additional "backfocus". This requires that the Blocking Filter be moved further up the light cone. As a result the aperture of the Blocking filter needs to be larger to allow for the larger cone size.

• B600 for Imaging Use up to 400mm Focal Length Telescope
• B1200 for Visual Use up to 6mm Focal Length Telescope
• B1800 for Visual Use up to 1200mm Focal Length Telescope
• B3400 (straight thru only) for visual Use up to 1800mm Focal Length Telescope

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.

B3400 Blocking Filter (2.0" straight thru)

2.0" Price $1,399.00 Art. No. B3400s2
( contact us directly or buy from dealer )

For telescopes with 2" focuser

Pre-orders will be shipped in the order they are received.
Prices are subject to change without notice.