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Thread: Baader Solar Continuum Filter, Are they any good?

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    Default Baader Solar Continuum Filter, Are they any good?



    So has anyone got any thoughts on this Baader Solar Continuum Filter.
    It sounds as if it would be ideal for my 8” sct.
    Has anyone used one or are able to show an image of the sun as seen through one.
    Here’s a link https://www.firstlightoptics.com/sol...um-filter.html
    I’m a bit worried that my expectations of what I’m hoping to see through this filter are maybe slightly unrealistic.
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    Scope = Celestron CPC800 8"sct. Sky-watcher Heritage 130p flex tube Dobsonian Binoculars = Helios Ultima 10x50 porro prism.
    Eyepieces = Baader Hyperion Aspheric 31mm and 36mm. Baader Hyperion 8mm, 13mm, 17mm, 21mm and 24mm.
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    Default Re: Baader Solar Continuum Filter, Are they any good?

    I have one, I found it was better when I stacked it with a ha filter, it gave me more contrast in my images, showing better, "granulation ". A solar scope is going to be alot better but I would say that that filter stacked with ha dose well if that's all ones budget allows.

    Here is a link to some of the images, can't help you on visually work, I've never tried

    My first sun image!
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    Default Re: Baader Solar Continuum Filter, Are they any good?

    I’m more of a visual observer are the views impressive when looking directly through the filter?
    Scope = Celestron CPC800 8"sct. Sky-watcher Heritage 130p flex tube Dobsonian Binoculars = Helios Ultima 10x50 porro prism.
    Eyepieces = Baader Hyperion Aspheric 31mm and 36mm. Baader Hyperion 8mm, 13mm, 17mm, 21mm and 24mm.
    Diagonal = 2" Altair dielectric diagonal.

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    Default Re: Baader Solar Continuum Filter, Are they any good?

    Quote Originally Posted by cosmicbeach View Post
    I’m more of a visual observer are the views impressive when looking directly through the filter?
    Hello Cosmicbeach,

    I am not using the Baader Solar Continuum filter for Sun, but sometimes for Moon to increase the contrast.
    When observing Sun with the BSC filter, I would recommend to stack it with the IR cut, as the BSC has a transmissivity leakage in IR, not very good for the eyes.
    Baader will tell you, which Sun foil for the aperture of your scope is necessary.

    Best,

    JG
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    Default Re: Baader Solar Continuum Filter, Are they any good?

    The solar continuum is an add on filter for enhancing contrast. It's for a white light scope that is already filtered with a Herschel wedge or an aperture filter (glass or film) and it has a green color to it.

    I have one and do think it adds a little to the contrast but makes everything look like pea soup. One of my observing buddies tried it and described the effect as calming down the atmosphere. He was more enthusiastic than I.

    Honestly I don't think it's worth the money, but I like to fiddle with different things.

    B
    Central Maine

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    Default Re: Baader Solar Continuum Filter, Are they any good?

    It's basically an addon narrowband green filter - for the sun, you need to use it with a suitable solar filter or herschel wedge.

    Since it's a narrowband filter, you'll see the most improvement with achromatic refractors - since you're only looking around a single wavelength, there's no Chromatic aberration to worry about, which gives you a significantly sharper image.

    With Apo refractors or something like an SCT, the improvement is more subtle, but once I got used to the green colour, I found it easier on the eyes than the white light view, and I think it does improve the image somewhat - but it's not as obvious as when used with an
    achromatic refractor. If you already have a single wavelength narrowband filter, like an Oiii one, then using that in combination with a solar filter - you NEED the solar filter to avoid fried eyeballs - will give you an idea of the sort of result.

    (Safety note - Always use a front of scope Solar filter - or a modern herschel wedge with solar ND filters, for suitable refractors - when observing the sun. Don't be tempted to use deep sky imaging filters on their own - you need to cut out 99+% of the sun's heat and light to observe it safely; dedicated solar scopes have suitable energy rejection filters built in.)
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    Default Re: Baader Solar Continuum Filter, Are they any good?

    Quote Originally Posted by jerryTheC View Post
    It's basically an addon narrowband green filter - for the sun, you need to use it with a suitable solar filter or herschel wedge.

    Since it's a narrowband filter, you'll see the most improvement with achromatic refractors - since you're only looking around a single wavelength, there's no Chromatic aberration to worry about, which gives you a significantly sharper image.

    With Apo refractors or something like an SCT, the improvement is more subtle, but once I got used to the green colour, I found it easier on the eyes than the white light view, and I think it does improve the image somewhat - but it's not as obvious as when used with an
    achromatic refractor. If you already have a single wavelength narrowband filter, like an Oiii one, then using that in combination with a solar filter - you NEED the solar filter to avoid fried eyeballs - will give you an idea of the sort of result.

    (Safety note - Always use a front of scope Solar filter - or a modern herschel wedge with solar ND filters, for suitable refractors - when observing the sun. Don't be tempted to use deep sky imaging filters on their own - you need to cut out 99+% of the sun's heat and light to observe it safely; dedicated solar scopes have suitable energy rejection filters built in.)
    Great advice thanks I think I will have a go with the o111 like you advised. I will probably then end up sticking with my front filter and a yellow colour filter on the ep.
    Scope = Celestron CPC800 8"sct. Sky-watcher Heritage 130p flex tube Dobsonian Binoculars = Helios Ultima 10x50 porro prism.
    Eyepieces = Baader Hyperion Aspheric 31mm and 36mm. Baader Hyperion 8mm, 13mm, 17mm, 21mm and 24mm.
    Diagonal = 2" Altair dielectric diagonal.

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    Default Re: Baader Solar Continuum Filter, Are they any good?

    Back to the Solar Contiuum filter.

    Its wavelength, close to the Fraunhofer e-line, is the green wavelength where our eyes can resolve the smallest contrast differences on the finest textures, like the granulation on the Sun surface.

    The second such wavelength of light is close to 470nm in blue, which is quite popular when viewing Jupiter due to the contrast and resolution enhancement of the features in complementary color (yellow, orange, red).

    The OIII filter transmitts light on the 'dip' in the intersection of the blue and green sensitive cones spectral curves,
    so it is not as helpful as the Solar Continuum, or as the 470nm filters, in their respective applications.

    Best,

    JG
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