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H alpha solar filter?

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milanpicard
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H alpha solar filter?

#1

Post by milanpicard » Sat Jan 11, 2020 12:06 pm

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.
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sdbodin
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#2

Post by sdbodin » Sat Jan 11, 2020 3:24 pm

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
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Thefatkitty
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#3

Post by Thefatkitty » Sat Jan 11, 2020 3:49 pm

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 :D

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Lowjiber
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#4

Post by Lowjiber » Sat Jan 11, 2020 4:03 pm

Do not venture into Hydrogen-alpha viewing and/or imaging with a reflector telescope... they can't take the heat, literally.

To get started with Ha, 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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#5

Post by milanpicard » 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?
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notFritzArgelander
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#6

Post by notFritzArgelander » Sat Jan 11, 2020 9:09 pm

Yes. Professional solar telescopes are often reflectors but have uncontested mirrors to do Ha imaging.
Scopes: Refractors: Orion ST80, SV ED80 A f7; Newtonians: Z12 f5; Catadioptrics: VMC110L, Intes MK66. 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 III, Vixen Porta II, Celestron CG5, Orion Sirius EQG
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#7

Post by notFritzArgelander » Sun Jan 12, 2020 6:33 am

notFritzArgelander wrote:
Sat Jan 11, 2020 9:09 pm
Yes. Professional solar telescopes are often reflectors but have uncontested mirrors to do Ha imaging.
Autocorrect error: "uncontested" should read "uncoated".
Scopes: Refractors: Orion ST80, SV ED80 A f7; Newtonians: Z12 f5; Catadioptrics: VMC110L, Intes MK66. 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 III, Vixen Porta II, Celestron CG5, Orion Sirius EQG
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#8

Post by Lady Fraktor » Sun Jan 12, 2020 6:37 am

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?
Unfortunately yes, Ha and Helium filters are much too expensive and if you could afford one it would not work with your reflector.
Proper Telescopes: Antares 105 f/15, Celestron 150 f/8, Stellarvue NHNGDX 80 f/6.9, TAL 100RS f/10, TS 102 f/11, UR 70 f/10, Vixen ED115s f/7.7
Mounts: Celestron AS-GT, Celestron CG-5 w/ Argo Navis & tracking motor, SLT w/ pier & tripod mods, Manfrotto 028b w/ SV M2C, Mantrotto 055Pro w/ 128RC, TAL MT1C, Vixen SXP w/ HAL-130 & half pier
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