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Thread: Filters .... how important???

  1. #1
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    Default Filters .... how important???



    Hey'all

    I would like to know how important or necessary are the filters for DSO imaging? can someone get DSO without filters if possible?

    Let's name 2 or 3 objects, say M42, M45 and Veil Nebula, can those objects be done without filters of any kind?

    The question is about a mono cooled [CCD or CMOS] astro camera, not a modded DSLR or OSC.

    I saw the stars of those objects by my naked eye without nebula, not even with a scope or binocular, so does that mean it is impossible to get any kind of clusters or nebula if no filters used? and seeing those objects by naked eyes does it mean the light pollution isn't bad that much yet?

    I know filters isn't a substitution or replacement for a dark sky, but if there is no dark sky clear, what is the possibilities to get any kind of DSO nebulosity without filters under any percent of light pollution?
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    Default Re: Filters .... how important???

    i have photographed Orions Nebula lots without filters on my DSLR - know you said not on a DSLR or Modded version, mind from my Amber into red Zone i can see Pleadies and Orions nebulosity without a scope admittedly the Pleadies looks like a cloud is round the stars but tells me its clear night if i can see it
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    Default Re: Filters .... how important???

    Quote Originally Posted by hobbit1066 View Post
    i have photographed Orions Nebula lots without filters on my DSLR - know you said not on a DSLR or Modded version, mind from my Amber into red Zone i can see Pleadies and Orions nebulosity without a scope admittedly the Pleadies looks like a cloud is round the stars but tells me its clear night if i can see it
    And your DSLR is modded?

    I couldn't see any cloud or nebulosity at all of those regions, not even with a scope or binoculars, with naked eyes i only see the bright stars on those regions, so for Orion i see the belt and the 3 brightest stars [Rigel, Belegeuse, and Bellatrix], and for M45 i think i managed to see about 5 stars or 6 by my eyes, but it is so very far away that i have to focus long to adapt my eyes to see something.

    So, if i manage to see those stars, does it mean i can get images of them without filters and mono camera? and if i have filters then it will be even better? and does that mean the light pollution isn't that bad? because with light pollution topic i feel the bad it is then it is impossible to see most bright stars in the sky, or even if it can be seen but no much of nebulosity to be captured with cameras even if using long exposures subs and stacking.
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    Default Re: Filters .... how important???

    my DSLR is stock no mods at all
    Ring nebula D5200
    new ring nebula.jpg

    Orion Nebula the Red si the orginal as shot and the black n white and colour , reworks this was if memory serves 15secs on a tracked GOTO Alt azi and 102 refractor
    image.jpeg
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    Default Re: Filters .... how important???

    Quote Originally Posted by hobbit1066 View Post
    my DSLR is stock no mods at all
    Ring nebula D5200
    new ring nebula.jpg

    Orion Nebula the Red si the orginal as shot and the black n white and colour , reworks this was if memory serves 15secs on a tracked GOTO Alt azi and 102 refractor
    image.jpeg
    I see, so if i take long exposures or subs and i stack them then i can get something even without a filter?

    I have a mono cooled camera which should do better then than a stock unmodded DSLR, i even have a cheap small camera but color that is also for astro, i can give this a try before using the mono cooled version, i want to be ready to first light with mono at best, and i really want to start with Orion as first ever light with my mono camera.

    Thank you very much!
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    Default Re: Filters .... how important???

    m42.jpg
    Unmodded DSLR, no filter, and orange zone
    Damian
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    Default Re: Filters .... how important???

    Which camera on which scope got that pic?
    Camera settings, stacking, etc?
    Scopes: Explore Scientific ED 127mm APO and Orion Optics UK europa 250mm Newtonian, Mount: Sky-Watcher EQ6 pro with SynScan go-to, Eyepieces: Explore Scientific 68degree 2" 40mm & 28mm, 1.25" 16mm, Barlow: Altair 2" 2x, Diagonal: Altair 2",
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    Default Re: Filters .... how important???

    You are asking specifically about a mono camera. No filters are required if you want a monochrome image. Monochrome is best for showing fine detail, and some astrophotographers prefer it for that reason. For best detail, you would want to add an IR/UV cut filter.

    However, if you want colour, filters are essential. The basic set is LRGB, giving you normal colour. You shoot separate frames through each filter and then blend them together in processing. At some point, you may want to get narrowband filters. The most common are Ha, OIII and SII. These three are used to make the familiar Hubble-palette false colour images.
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    DSO AP: Orion 200mm f/4 Newtonian Astrograph; ATIK 383L+; EFW2 filter wheel; Astrodon Ha,LRGB filters; KWIQ/QHY5 guide scope; Planetary AP: Celestron C-11; ZWO ASI120MC; Portable: Celestron C-8 on HEQ5 pro; C-90 on wedge; 20x80 binos; Etc: Canon 350D; Various EPs, etc. Obs: 8' Exploradome; iOptron CEM60 (pier);
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    Default Re: Filters .... how important???

    Nice, thank you very much!
    Scopes: Sky-Watcher StarTravel 80 OTA Mount: Skywatcher AZ-EQ6/GT
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