Coronado - 15mm Blocking Filter

$ 870.00 Reg.$ 1099.00 SAVE $ 229.00

BF15

Coronado - 15mm Blocking Filter

The Blocking Filter is the second element in any Coronado H-Alpha system, it
is just as crucial to your safety and the system’s performance as the front
element. Use the following guidelines for selecting which Blocking Filter you
need based on the focal length of the telescope being used. If you are
switching to a longer focal length telescope your SolarMax system you can
purchase blocking filters separately.

	
Focal Length <500mm - BF5

Focal Length <1000mm - BF10

Focal Length <1500mm - BF15

Focal Length <3000mm - BF30

There is no advantage for visual use in using a larger blocking filter than required based on the
focal length; however, based on customer feedback, we understand that for imaging with telescopes
under 500mm fl, the BF10 is easier to use than the BF5.
 
The Blocking Filter is not a stand alone filter. It is an integral part of the Coronado design
and cannot be used without a SolarMax series filter on the front of the optical system

The BF5, 10, and 15 are all 1.25” right angle diagonals. The BF30 is a 2” straight through
design and comes with a 1.25” Zero Length reducer. 

May 2003 - We’d like to caution people that you cannot swap Coronado blocking filters and
narrowband front elements ad hoc without the risk of compromising safety. On no account, pair a
blocking filter from an Isle of Man production run (AS1 series filter) with a US produced
SolarMax series filter. The blocking elements have been reconfigured in the newer models and the
older blocking filters are NOT compatible from a blocking perspective with the newer front
narrowband elements. We can retrofit additional blocking to older blocking filters to make them
compatible with newer narrowband elements. We strongly advise anyone considering pairing a front
narrowband element with any blocking filter (other than the one it was originally supplied from
the factory) to contact customer service. Coronado Components are NOT compatible with any other
manufactures H-Alpha systems. Coronado will not be held responsible for problems caused by
improper matching of filter elements. 

	

The 15mm Blocking Filter is for use with any of the SolarMax series filters it is optimised to
provide a full disc image on telescopes with a focal length up to 1,500mm. It is a 1.25” right
angled diagonal unit.
Model # BF15