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beginning monochrome + filters

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#1 vland

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Posted 05 March 2021 - 06:57 AM

Hi, I ordered a qhy268m monochrome and LRGB Baader set

 

I'd also like to buy a narrowband h-alpha filter, Baader as well

 

1. what nm would you suggest? 3.5nm - 7nm - 35nm?

2. can I combine h-alpha with RGB? 

 

 

ty


Edited by vland, 05 March 2021 - 07:02 AM.


#2 terry59

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Posted 05 March 2021 - 07:01 AM

Hi, I ordered a qhy268m monochrome and LRGB Baader set

 

I'd also like to buy a narrowband h-alpha filter, Baader as well

 

1. what nm would you suggest? 3nm - 7nm - 35nm?

2. can I combine h-alpha with RGB? 

 

 

ty

I would avoid the Baader 3.5nm Ha filter because of haloing. The Baader 7nm also has some haloing. I recommend an 8nm Chroma Ha filter if cost is an issue or their 5nm if it is not. I have both with no haloing



#3 vland

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Posted 05 March 2021 - 07:04 AM

I would avoid the Baader 3.5nm Ha filter because of haloing. The Baader 7nm also has some haloing. I recommend an 8nm Chroma Ha filter if cost is an issue or their 5nm if it is not. I have both with no haloing

thank you, is it haloing an issue also for RGB filters? 



#4 imtl

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Posted 05 March 2021 - 07:09 AM

I had halos in baader L and B filters as well.



#5 Huangdi

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Posted 05 March 2021 - 07:56 AM

Hi, I ordered a qhy268m monochrome and LRGB Baader set

 

I'd also like to buy a narrowband h-alpha filter, Baader as well

 

1. what nm would you suggest? 3.5nm - 7nm - 35nm?

2. can I combine h-alpha with RGB? 

 

 

ty

That also depends on your optics. What scope do you have? At F3 or faster you need specialised high speed filters. I always found my Baader 7nm ha to have nice images. Yes, there were some halos, but that doesn't justify spending that huge amount of money for chroma/Astrodon ones. Not until I have more impotent things like an auto focuser haha. 

 

Same goes for LRGB. I'd rather have a halo on a large star than spend the equivalent of my telescope on lrgbsho filters.

 

It's a decision between money and quality, as always. 

 

And yeah there are many ways to combine h-alpha and rgb :) 



#6 SeymoreStars

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Posted 05 March 2021 - 08:03 AM

If you ever plan to step up to the ASI2600mm (APS-C size sensor) I recommend getting 36mm filters.


Edited by SeymoreStars, 05 March 2021 - 08:06 AM.

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#7 Huangdi

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Posted 05 March 2021 - 08:16 AM

If you ever plan to step up to the ASI2600mm (APS-C size sensor) I recommend getting 36mm filters.


That's the same camera as the qhy 268M :p

Edited by Huangdi, 05 March 2021 - 08:17 AM.

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#8 SeymoreStars

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Posted 05 March 2021 - 08:23 AM

That's the same camera as the qhy 268M tongue2.gif

OIC haven't had my first cup of coffee. Then 36mm are definitely needed to prevent vignetting.



#9 vland

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Posted 05 March 2021 - 09:50 AM

OIC haven't had my first cup of coffee. Then 36mm are definitely needed to prevent vignetting.

that won't be a problem, I already ordered 2'' filters because I don't want to buy filters again anytime soon.

I understand that there are better filters than Baader but I have no experience at all... if I manage to get nice images, even with some halos, it'll be a good start.

 

I'm just trying to understand what band should I aim for. probably 7nm is a good compromise

 

(I have a tak FSQ85)


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#10 SeymoreStars

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Posted 05 March 2021 - 09:51 AM

that won't be a problem, I already ordered 2'' filters because I don't want to buy filters again anytime soon.

I understand that there are better filters than Baader but I have no experience at all... if I manage to get nice images, even with some halos, it'll be a good start.

 

I'm just trying to understand what band should I aim for. probably 7nm is a good compromise

 

(I have a tak FSQ85)

Good decision. Go for the narrowest band you can afford.


Edited by SeymoreStars, 05 March 2021 - 09:51 AM.

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