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    Question Interested in solar filter



    So I have my dob and want to eventually get an Ha telescope, but before I save up for it I'd like to construct a filter for my dobsonian. Is this ok to do? Just using baader filter film or is there other things I need to take into consideration?

    Thanks.
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    Default Re: Interested in solar filter

    Maybe a Seymour filter film so I get to see the sun in color? Can you view prominences with such a setup?
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    Default Re: Interested in solar filter

    A white light filter lets you see sun spots and surface detail but you will need a Ha filter to see prominences.
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    Default Re: Interested in solar filter

    The two options are the ND 5 (for visual) ND3.8 (for photography)
    Common one is the ND% baader film, just have to make a collar for it to place over the scope end.

    (This was a quicky)
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    Default Re: Interested in solar filter

    I may go with the Seymour Solar film just for the color aspect. I just want to get something for the upcoming transit for now and they the Ha later on but before the eclipse.
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    Default Re: Interested in solar filter

    I'm not an expert by any means on this kind of thing and that will be my disclaimer as "try this at your own risk"! I made a filter a few years back to watch the transit of Venus through an 8" dobsonian. I cut matching holes in 2 10x10 inch pieces of 1.5 inch rigid pink insulation that fit snugly over the end of the OTA. I simply glued a piece of Baader film between the 2 pieces of insulation and slapped it on the end of the tube.
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    Default Re: Interested in solar filter

    There are many ways to make a solar filter, the main thing is that it cannot be accidentally knocked off by the wind or clumsy people and remember to check for scratches and pinholes before using it.
    DM1975 likes this.
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    Default Re: Interested in solar filter

    One of the points you should take into account is you don't need full aperture on a newt. It's simply not necessary. Easier to make, far cheaper and safer as per the photo.

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    Default Re: Interested in solar filter

    So could I do that with a 2" H alpha filter you think?
    Apertura AD10, flocked, cocked, and ready to rock! / Telrad / leveling base/ other stuff
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    Default Re: Interested in solar filter

    Wait wouldent the HA filter go in the optical train not on the objective?

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