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Thread: Narrowband or line filters for DSLR imaging

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    Default Narrowband or line filters for DSLR imaging



    I'm looking for information on imaging with narrow-band or line filters. I want to experiment with the effects of these filters using a DSLR camera.
    The filters need to be two inch imaging filters, not eyepiece filters...
    I'm looking for information on Sulfer II, H-alfa, H-beta, O III line filters. I also want to look into narrow-band filters.
    I would like to keep the costs as low as possible. This is only an experiment to see what effects I can produce.
    Does anyone have any experience with this?
    Where would be a good place to look for these types of filters?
    I've looked at OPT. They have a wide range of filters. What other suppliers might carry what I'm looking for?
    I would appreciate any help in this venture.
    Thanks.

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    Default Re: Narrowband or line filters for DSLR imaging

    Optolong,Lumicon, Baader, Hutech, Astronomik. Just to name a few of the better brands. You don't want to cut costs with filters but if you do Celestron branded Baader filters are a great value. OPT is one of the best suppliers I've used. Agena Astro as well. There are also many direct Chinese sellers on Ebay selling brands like Oplong for well under $75 dollars a filter but you get what you pay for. AstroMart is a great place to find used gear as well. Maybe look into having your DSLR modded to go full spectrum.
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    Default Re: Narrowband or line filters for DSLR imaging

    Thanks.
    The camera that I plan to use is modified with a full spectrum + H-alfa filter.

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    Default Re: Narrowband or line filters for DSLR imaging

    I didn't spend too much time with my filters on a dslr, that's how i got into mono ccd ,i got filters to help ha emissions in my early stages of astrophotography. if you are looking to help with red/ha emissions i probably would look into just a ha filter at first,you can get these as a dslr clip in depending on what model you have or just standard 2'' -1.25.

    you will need longer exposure times filters can block alot of light, a dslr has a bayer matrix on it so only about 25% of pixel are being used (turned on) .so i would think you would get noise from those 3 out 4 pixels from the ones not getting used, there should be programs /process to this fix this.
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    Default Re: Narrowband or line filters for DSLR imaging

    Yes, it should be doable. While the bayer matrix means that only 1/4 (R, B) or 1/2 (G) of the pixels are going to respond, you typically have many more pixels to start off with in a DSLR than in most affordable astronomical CCDs.
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