I am looking for a filter for m42, your thoughts?

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messier 111
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I am looking for a filter for m42, your thoughts?

#1

Post by messier 111 »

I am looking for a filter for m42, your thoughts?
I know it is very confusing filters, so I ask for your help please.
there is the uhc, uhc 2, the 0iii ...... ouuuuffffff.
I'm lost . for visual only .
:observer: I am a fan of refractor and Delos eyepieces .

100mm ( 4 ) f/714mm ed Apochromatic Refractor .

120mm (4.75") F/900mm Fluorite ED Apochromatic Refractor .

Delos , 4,5 - 6 - 10 and 17,3 mm .

As Arthur C. Clarke has observed: ‘How inappropriate to call this planet Earth, when clearly it is Ocean.’



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notFritzArgelander
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Re: I am looking for a filter for m42, your thoughts?

#2

Post by notFritzArgelander »

I don't use the uhc etc. from experience. They disappoint me by darkening the image and not enhancing contrast sufficiently.

The OIII filters only work well on planetary nebulae and won't do a thing for M42. The ionization temperature of M42 is too low to excite the line emissions appreciably. OIII is great on many planetary nebula.

For M42 and similar lower temperature nebulae (than planetaries anyway) I've found the H-beta filter to be smashingly good! The H-beta line is near the peak sensitivity of the eye so the dimming is tolerable and the increase in contrast is very welcome. At the old site I posted an observing report where I toured Orion's nebulae with an H-beta filter. I was even able (on an exceptionally dark, clear night) to detect the Horsehead nebula using my 80mm SV ED80 f7 and a 2" H-beta filter on a Panoptic 35mm eyepiece. Scanning M42 itself was a real treat with fine filamentary details showing where the shock fronts in the gas were.

I use the Baader H-beta some folks also use Astronomik and Lumicon. They are all of good optical quality. Disappointment with filters is mostly from folks going cheap and getting something that degrades the image.
Scopes: Refs: Orion ST80, SV 80EDA f7, TS 102ED f11 Newts: 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 III, Vixen Porta II, Celestron CG5, Orion Sirius EQG
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pakarinen
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Re: I am looking for a filter for m42, your thoughts?

#3

Post by pakarinen »

Have you compared your beta to an H alpha?
On dead branches
birds remain perched
at autumn's end.


Orion ST120, Meade AdventureScope ST80, Skywatcher 90mm Mak
Twilight 1 / Astro Devices encoders / Nexus II / Manfrotto 475B tripod / Stellarvue M1V / Skywatcher AZ5
Nikon Aculon 10x50 binos / US Navy 1944 Mark 30 7x50 binos
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Re: I am looking for a filter for m42, your thoughts?

#4

Post by notFritzArgelander »

pakarinen wrote: Sat Nov 21, 2020 11:57 am Have you compared your beta to an H alpha?
Yes, just for grins. The sensitivity of the human eye peaks near H beta so for visual use the H beta is better. H alpha is better for astrophotography. I have the Baader H-alpha, H-beta, O III, and SII filters.
Scopes: Refs: Orion ST80, SV 80EDA f7, TS 102ED f11 Newts: 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 III, Vixen Porta II, Celestron CG5, Orion Sirius EQG
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messier 111
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Re: I am looking for a filter for m42, your thoughts?

#5

Post by messier 111 »

I thought the beta was for the horse head.
:observer: I am a fan of refractor and Delos eyepieces .

100mm ( 4 ) f/714mm ed Apochromatic Refractor .

120mm (4.75") F/900mm Fluorite ED Apochromatic Refractor .

Delos , 4,5 - 6 - 10 and 17,3 mm .

As Arthur C. Clarke has observed: ‘How inappropriate to call this planet Earth, when clearly it is Ocean.’



Jean-Yves . :flags-canada:
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Re: I am looking for a filter for m42, your thoughts?

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Post by notFritzArgelander »

messier 111 wrote: Sat Nov 21, 2020 9:02 pm I thought the beta was for the horse head.
It is much more generally useful than that! I've used it on the Flame Nebula in Auriga and the Christmas Tree in Monoceros. Seeing is believing. It is my favorite filter for not-a-planetary nebula. Restricting it to the Horsehead makes no sense to me or my eyes.
Scopes: Refs: Orion ST80, SV 80EDA f7, TS 102ED f11 Newts: 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 III, Vixen Porta II, Celestron CG5, Orion Sirius EQG
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messier 111
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Re: I am looking for a filter for m42, your thoughts?

#7

Post by messier 111 »

:observer: I am a fan of refractor and Delos eyepieces .

100mm ( 4 ) f/714mm ed Apochromatic Refractor .

120mm (4.75") F/900mm Fluorite ED Apochromatic Refractor .

Delos , 4,5 - 6 - 10 and 17,3 mm .

As Arthur C. Clarke has observed: ‘How inappropriate to call this planet Earth, when clearly it is Ocean.’



Jean-Yves . :flags-canada:
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pakarinen
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Re: I am looking for a filter for m42, your thoughts?

#8

Post by pakarinen »

The transmission graphs in your second reference look interesting.
On dead branches
birds remain perched
at autumn's end.


Orion ST120, Meade AdventureScope ST80, Skywatcher 90mm Mak
Twilight 1 / Astro Devices encoders / Nexus II / Manfrotto 475B tripod / Stellarvue M1V / Skywatcher AZ5
Nikon Aculon 10x50 binos / US Navy 1944 Mark 30 7x50 binos
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Re: I am looking for a filter for m42, your thoughts?

#9

Post by notFritzArgelander »

Your first link is a resource I'm familiar with and with which I disagree, emphatically. UHC filters are to my eyes pretty much useless. Your link underestimates the usefulness of H-beta badly. I used to follow the recommendations of that link and was surprised to find that when I stepped outside its limitations things were better. Knisely's recommendations are subjective. So are mine. I can't recommend following his because in my experience, they are not helpful.

I bought an H-beta filter specifically for the Horsehead. On a whim I tried it on M42. Imagine my surprise when it outperformed Knisely's suggestion at almost anything I pointed it towards.

@j.gardavsky is the forum expert on filter usage. It would be useful if he could weigh in.

The second link is factual and therefore agreeable.
Scopes: Refs: Orion ST80, SV 80EDA f7, TS 102ED f11 Newts: 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 III, Vixen Porta II, Celestron CG5, Orion Sirius EQG
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Re: I am looking for a filter for m42, your thoughts?

#10

Post by messier 111 »

notFritzArgelander wrote: Mon Nov 23, 2020 6:31 pm
Your first link is a resource I'm familiar with and with which I disagree, emphatically. UHC filters are to my eyes pretty much useless. Your link underestimates the usefulness of H-beta badly. I used to follow the recommendations of that link and was surprised to find that when I stepped outside its limitations things were better. Knisely's recommendations are subjective. So are mine. I can't recommend following his because in my experience, they are not helpful.

I bought an H-beta filter specifically for the Horsehead. On a whim I tried it on M42. Imagine my surprise when it outperformed Knisely's suggestion at almost anything I pointed it towards.

@j.gardavsky is the forum expert on filter usage. It would be useful if he could weigh in.

The second link is factual and therefore agreeable.
like i said, i just find it interesting. also, it uses a 10inch most of the time.
I wonder if in a 4.75 it's worth it?

@j.gardavsky is the forum expert on filter usage. It would be useful if he could weigh in.
good idea .
:observer: I am a fan of refractor and Delos eyepieces .

100mm ( 4 ) f/714mm ed Apochromatic Refractor .

120mm (4.75") F/900mm Fluorite ED Apochromatic Refractor .

Delos , 4,5 - 6 - 10 and 17,3 mm .

As Arthur C. Clarke has observed: ‘How inappropriate to call this planet Earth, when clearly it is Ocean.’



Jean-Yves . :flags-canada:
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Re: I am looking for a filter for m42, your thoughts?

#11

Post by notFritzArgelander »

messier 111 wrote: Mon Nov 23, 2020 9:54 pm
notFritzArgelander wrote: Mon Nov 23, 2020 6:31 pm
Your first link is a resource I'm familiar with and with which I disagree, emphatically. UHC filters are to my eyes pretty much useless. Your link underestimates the usefulness of H-beta badly. I used to follow the recommendations of that link and was surprised to find that when I stepped outside its limitations things were better. Knisely's recommendations are subjective. So are mine. I can't recommend following his because in my experience, they are not helpful.

I bought an H-beta filter specifically for the Horsehead. On a whim I tried it on M42. Imagine my surprise when it outperformed Knisely's suggestion at almost anything I pointed it towards.

@j.gardavsky is the forum expert on filter usage. It would be useful if he could weigh in.

The second link is factual and therefore agreeable.
like i said, i just find it interesting. also, it uses a 10inch most of the time.
I wonder if in a 4.75 it's worth it?

@j.gardavsky is the forum expert on filter usage. It would be useful if he could weigh in.
good idea .
I used it happily in my Stellarvue ED 80mm Access from a dark site.
Scopes: Refs: Orion ST80, SV 80EDA f7, TS 102ED f11 Newts: 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 III, Vixen Porta II, Celestron CG5, Orion Sirius EQG
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Re: I am looking for a filter for m42, your thoughts?

#12

Post by messier 111 »

well finally I spoke with the people at the store where I go for my astronomical things, they let them try the filters.
h beta.
o111.
uhc lpr.
all filters are Baader.

So as soon as the weather on my side, I will do the necessary tests.
and I will take my decision at that time.
:observer: I am a fan of refractor and Delos eyepieces .

100mm ( 4 ) f/714mm ed Apochromatic Refractor .

120mm (4.75") F/900mm Fluorite ED Apochromatic Refractor .

Delos , 4,5 - 6 - 10 and 17,3 mm .

As Arthur C. Clarke has observed: ‘How inappropriate to call this planet Earth, when clearly it is Ocean.’



Jean-Yves . :flags-canada:
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