Coronado

4 Item(s)
Set Descending Direction
  1. Coronado - 5mm Blocking Filter

    $329.00
    SKU: COR-BF5

    In stock

    The Coronado 5mm Blocking Filter is a secondary filter for use with any of the Meade Corondo SolarMax Filter series for telescopes with a focal length up to 500mm. It is a 1.25" right angled diagonal unit. Blocking filters are not complete solar filters, they require a primary solar filter. Please do not use a blocking filter alone.
    FREE SHIPPING(48 States)
  2. Coronado - 15mm Solar Blocking Filter

    $699.00
    SKU: COR-BF15

    In stock

    The Coronado 15mm Blocking Filter is a secondary interference filter part of a two filter system. Solar Blocking Filters are designed to be paired with a Meade Coronado Solarmax primary solar filter. 15mm blocking filters are best for telescopes up to 1500mm in focal length.
    FREE SHIPPING(48 States)
  3. Coronado - 30mm Solar Blocking Filter

    $1,599.00
    SKU: COR-BF30

    In stock

    The Coronado 30mm Blocking Filter is a 2" straight through design and comes with a 1.25" Zero Length reducer. Recommended for photographic use on telescopes with focal lengths up to 3000mm. Coronado blocking filters are part of a two part filter system and should not be used alone. Be sure to pair this blocking filter with a Meade Coronado Solarmax primary solar filter.

    FREE SHIPPING(48 States)
  4. Coronado - 10mm Blocking Filter

    $499.00
    SKU: COR-BF10

    In stock

    The Coronado 10mm 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 1000mm. It is a 1.25" right angled diagonal unit.

    FREE SHIPPING(48 States)
4 Item(s)
Set Descending Direction

Coronado has been developing ultra-narrowband filters and associated technologies for the professional market for over 40 years. Experience the Sun the Coronado way in the light of Hydrogen-Alpha (Ha) and open up a whole new world of astronomy! What's so interesting about Hydrogen-Alpha? The red light of H-Alpha with a wavelength of 656.3 nm (1 nm = 1 billionth of a meter) is a very prominent feature in the solar light spectrum since hydrogen makes up 75% by weight of the outer layers of the sun. This light shows us layers up to 1700 km above the sun's visible surface and is especially important for imaging the lower chromosphere.

The bright regions around sunspots, called plages, and brilliant solar flares are easily seen at this wavelength. Filaments, vivid string-like regions, and sunspots, large blotches on the solar surface, appear dark. Filaments on the solar limb appear bright against the blackness of space and are called prominences you have probably seen the stunningly beautiful images of. The Sun is active, ever changing, and constantly entertaining. See the Sun in a new light- the Coronado way!