H alpha solar filter?
- milanpicard
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H alpha solar filter?
I saw some images, they said with H alpha filter, of the Sun, that showed a grainy surface plus some minuscular eruptions too on the sides of the disk. Can that be visible to the eye in visual astronomy, not photograph, in an 8dob? Does anyone know pls?
Last edited by milanpicard on Sat Jan 11, 2020 12:08 pm, edited 1 time in total.
- sdbodin
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Re: H alpha solar filter?
Yes, but this is not the simple screw in Ha filter for deep space imaging. These are very narrow band solar Ha filters, a $1000 should get you one from Daystar. One of the solar specialists should chime in here, this is out of my field.
Steve
Steve
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Re: H alpha solar filter?
Well, not a "solar specialist", but I believe the best you can do with a Dob is white light, as in a Baader, Thousand Oaks or the like solar filter. For HA , you're looking at a Daystar or Quark for a refractor, or a dedicated Solar scope such as a Lunt or a Coronado PST. Any way you do it, HA is mucho $$$....
That is the extent of my knowledge on that
All the best,
That is the extent of my knowledge on that
All the best,
Mark
"The Hankmeister" Celestron 8SE, orange tube Vixen made C80, CG4, AZ-EQ5 and SolarQuest mounts.
Too much Towa glass/mirrors.
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"The Hankmeister" Celestron 8SE, orange tube Vixen made C80, CG4, AZ-EQ5 and SolarQuest mounts.
Too much Towa glass/mirrors.
Solar:
H/A - PST stage 2 mod with a Baader 90mm ERF on a Celestron XLT 102 (thanks Mike!)
Ca-K - W/O 61mm, Antares 1.6 barlow, Baader 3.8 OD and Ca-K filters with a ZWO ASI174mm.
W/L - C80-HD with Baader 5.0 & 3.8 Solar film, Solar Continuum 7.5nm and UV/IR filters with a Canon EOS 550D.
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Re: H alpha solar filter?
Do not venture into Hydrogen-alpha viewing and/or imaging with a reflector telescope... they can't take the heat, literally.
To get started withHa , I recommend a DayStar Quark-Chromosphere as mentioned above. Couple that with a refracting telescope around 80mm with a focal ratio between f/ 7 and f/ 7.5. You'll need to add a UV/IR-cut filter (about $100) as the first thing the light encounters after entering the scope. You don't need a tracking mount for visual work, just about any alt/az mount will suffice.
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- milanpicard
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Re: H alpha solar filter?
Ok, I understand, thank you guys. I have a solar filter that is home made with that filter paper we all know, I can view sunspots well with it as I put it on the smaller unscrewable hole of the 8dob. So that is the extent pf solar observations I can do with my scope right? Of course anything very expensive is out of the question anyway. So this is it? Sunspots then?
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Re: H alpha solar filter?
Yes. Professional solar telescopes are often reflectors but have uncontested mirrors to do Ha imaging.
Scopes: Refs: Orion ST80, SV 80EDA f7, TS 102ED f11 Newts: AWB 130mm, f5, Z12 f5; Cats: VMC110L, Intes MK66,VMC200L f9.75 EPs: KK Fujiyama Orthoscopics, 2x Vixen NPLs (40-6mm) and BCOs, Baader Mark IV zooms, TV Panoptics, Delos, Plossl 32-8mm. Mixed brand Masuyama/Astroplans Binoculars: Nikon Aculon 10x50, Celestron 15x70, Baader Maxbright. Mounts: Star Seeker IV, Vixen Porta II, Celestron CG5
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Re: H alpha solar filter?
Autocorrect error: "uncontested" should read "uncoated".notFritzArgelander wrote: ↑Sat Jan 11, 2020 9:09 pm Yes. Professional solar telescopes are often reflectors but have uncontested mirrors to do Ha imaging.
Scopes: Refs: Orion ST80, SV 80EDA f7, TS 102ED f11 Newts: AWB 130mm, f5, Z12 f5; Cats: VMC110L, Intes MK66,VMC200L f9.75 EPs: KK Fujiyama Orthoscopics, 2x Vixen NPLs (40-6mm) and BCOs, Baader Mark IV zooms, TV Panoptics, Delos, Plossl 32-8mm. Mixed brand Masuyama/Astroplans Binoculars: Nikon Aculon 10x50, Celestron 15x70, Baader Maxbright. Mounts: Star Seeker IV, Vixen Porta II, Celestron CG5
- Lady Fraktor
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Re: H alpha solar filter?
Unfortunately yes,milanpicard wrote: ↑Sat Jan 11, 2020 4:50 pm Ok, I understand, thank you guys. I have a solar filter that is home made with that filter paper we all know, I can view sunspots well with it as I put it on the smaller unscrewable hole of the 8dob. So that is the extent pf solar observations I can do with my scope right? Of course anything very expensive is out of the question anyway. So this is it? Sunspots then?
Gabrielle
See Far Sticks: Elita 103/1575, AOM FLT 105/1000, Bresser 127/1200 BV, Nočný stopár 152/1200, Vyrobené doma 70/700, Stellarvue NHNG DX 80/552, TAL RS 100/1000, Vixen SD115s/885
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See Far Sticks: Elita 103/1575, AOM FLT 105/1000, Bresser 127/1200 BV, Nočný stopár 152/1200, Vyrobené doma 70/700, Stellarvue NHNG DX 80/552, TAL RS 100/1000, Vixen SD115s/885
EQ: TAL MT-1, Vixen SXP, SXP2, AXJ, AXD
Az/Alt: AYO Digi II, Stellarvue M2C, Argo Navis encoders on both
Tripods: Berlebach Planet (2), Uni 28 Astro, Report 372, TAL factory maple, Vixen ASG-CB90, Vixen AXD-TR102
Diagonals: Astro-Physics, Baader Amici, Baader Herschel, iStar Blue, Stellarvue DX, Tak prism, TAL, Vixen
Eyepieces: Antares to Zeiss (1011110)
The only culture I have is from yogurt
- Dragonsfire
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Re: H alpha solar filter?
If you want extra detail without the $1000 price tag (Ive drooled over those filters wanting some) then get a Baader 3.8 solar filter (not for visual observing) (5.0 is for visual).
Neil
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Orion XT8i Dob, ES AR102
9x50 RACI Finder, TELRAD Reflex Sight, Electro Dot Sight RD400X
Agena SWA 38mm 70 FOV 2" EP, Orion 25+10mm Sirius Plossl 52 FOV EP
ES 82* 11mm, 18mm 2", ES 68* 24mm, 6mm, 25mm Ortho. EP, Televue 3X Barlow,CS lens 2.8mm-12mm F1.4
Filters Baader Continuum, UV/IF cut, Lumicon UHC, DGM OIII. ND5/3.8 Kendrick
GX1 Lumix, E-PM2, ASI224mc, SteadyPix Deluxe, iOptron SkyTracker 7.7lb
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Re: H alpha solar filter?
About the cheapest way to see more of the sun is a used Coronado PST. I saw one for sale yesterday for £400. This is the scope that got most of us started and while it's made for viewing it can be used for imaging too ( probably with something you already have ).
Keith
Keith
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