Lunt Solar B1800 2" Blocking Filter - Diagonal with T2 Connection

Lunt Solar B1800 2" Blocking Filter - Diagonal with T2 Connection
Item # LS-B1800D2
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  • The Lunt Solar Systems B1800 Blocking Filter provides a full solar disc image when used with a Lunt Solar Systems H-Alpha Filter on telescopes with a maximum focal length of 1800mm.
  • The blocking filter is a necessary component for safety and performance in all solar telescopes.
  • The unique Lunt Solar Systems B1800 Blocking Filter design is housed in a 2" diagonal with a T2 connection, and an 1.25" adapter is included.
  • Must be used with a Lunt front etalon.


Lunt Solar System B1800 Blocking Filter

The Lunt Solar Systems B1800 Blocking Filter is its own unique system which houses an additional filter in a 2" T2 M42 diagonal. The blocking filter is required element for the safety and performance of any solar package - including Lunt H-Alpha parts. The Lunt Solar Systems B1800 filter will provide a full disk image of the Sun with telescopes that have a maximum of 1800mm of focal length.

Choose your blocking filter carefully for your telescope's focal length. If you were to use a larger blocking filter than is necessary to achieve a full disk image on your telescope system, the result may show image "ghosts" at the edge of the field of view! For best performance, be sure to pair your Lunt Solar Systems h-Alpha filter with the proper sized Lunt blocking filter. Because Lunt Solar Systems blocking filters contain a unique filter system. Lunt will only warranty the safety and/or performance of their systems when a Lunt blocking filter is paired with a Lunt Solar Systems Etalon system.

Lunt Solar Systems creates their line of h-alpha solar telescopes and h-apha accessories in Tuscon, Arizona. They have have put together a group of experienced solar enthusiasts who are looking forward to energizing the hobby with a continued commitment to advancing technologies, pride in quality, and the highest level of customer care. These are names you'll recognize, including Andrew Lunt with 20 years of optical design, Markus Ludes with his extensive knowledge of telescope design, Manny Serrano as a design engineer and Brian Stevens assembling, repairing and troubleshooting etalon systems.

Lunt Solar System B1800 Blocking Filter Features

  • Sharp, clear full disc images.
  • Unique Lunt Solar Systems design.
  • Housed in 2" diagonal with T2 connection.
  • Full Lunt Solar Systems Warranty when paired with Lunt front etalon.
Lunt Product Number: B1800D2

Andy Lunt displaying the B1800 blocking filter with T2 threads.

Additional Information

Additional Information

SKU LS-B1800D2
Manufacturer Lunt Solar
Solar Accessory Type Filters
Warranty 5 Year Warranty
Included Items

Included Items

  • Lunt Solar Systems B1800 Blocking Filter in 2" Diagonal
Questions & Answers

Product Questions

Sorry for "my" English use an online translator
I have a Lunt Ls60T H-alpha with B600. I wanted to know which blocking filter can be fitted to improve performance? Note I take pictures. Thanks Valerio
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