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HA Filter


(@paul-grace)
White Dwarf Customer
Joined: 4 years ago
Posts: 28
Topic starter  

Hi All,

 

I'm about to use my 12nm HA filter tonite.

Just going to do HA in this session.

Do I just treat the subs as normal but select the correct box and add all the supporting files.

Just want to get the HA data ready for the RGB when the moon is not out.

 

Many Thanks

 

Paul


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(@wvreeven)
Galaxy Admin
Joined: 4 years ago
Posts: 2035
 

@paul-grace Hi Paul,

Posted by: @paul-grace

Do I just treat the subs as normal but select the correct box and add all the supporting files.

What box do you mean?

If your software writes the filter name to the FITS header then APP will detect itself that you have used an Ha filter. Otherwise when the popup comes you need to select it manually. Is that what you meant?

Apart from that, the processing steps will be the same as for any other data.

Wouter


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(@paul-grace)
White Dwarf Customer
Joined: 4 years ago
Posts: 28
Topic starter  

Many thanks for the quick and great reply..exactly what I needed:)

 

This tick box....

 

image

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(@paul-grace)
White Dwarf Customer
Joined: 4 years ago
Posts: 28
Topic starter  

Ah...so it didnt work 🙁

 

I selected Ha for the lights with the Ha filter subs and RGB for all the supporting files...was this wrong?

Edit:

The supporting files were not created using the Ha filter.

Do I need to create some with the Ha filter?

 

Elephant Truck Nebula Ha Hydrogen alpha session 1 lpc cbg St

 

This post was modified 2 months ago by Paul Grace

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(@paul-grace)
White Dwarf Customer
Joined: 4 years ago
Posts: 28
Topic starter  

wot a fool..ofcourse theres less light with the filter so any files used not taken with the filter will show the issue on my pic DOH...bloody obvious when you put your brain in gear

 

New files being taken now...so glad I bought the ASI 183Mc Pro

 


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(@paul-grace)
White Dwarf Customer
Joined: 4 years ago
Posts: 28
Topic starter  

Hi All,

 

Back again  🙂

I've now created all the supprting files with the 12nm Ha filter in line.

When selecting the files to load do I tick Ha or rgb?

I'm guessing Ha as the filter is was used.

Many Thanks

 

Paul


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(@paul-grace)
White Dwarf Customer
Joined: 4 years ago
Posts: 28
Topic starter  

 

Elephant Nebula Ha Files Hydrogen alpha session 1 lpc cbg St

Ok..added all the files and selected Ha but the pic is now monochrome???

Should I have selected RGB for the flats, darks etc?

This post was modified 2 months ago by Paul Grace

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(@paul-grace)
White Dwarf Customer
Joined: 4 years ago
Posts: 28
Topic starter  
RGB Subs Hydrogen alpha session 1 St

Ok...this is with all the files taken with the Ha filter in

Lights I selected Ha and darks, flats bias were selected RGB.

Colour is now back but so is the mess.

 

What am I doing wrong?

All new darks, flats and bia in and all at the same focus and temp/

 

 

 


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(@andybooth)
White Dwarf Customer
Joined: 11 months ago
Posts: 30
 

If you are taking and processing only Ha data in this session, with an One Shot colour camera,

then you should be selecting Ha extract in the Tab0 Algorithm drop down,  and all files , image and calibration should be loaded as Ha.

You should expect a monochrome file at the end, as you are creating a file from a single channel on the colour chip.

After imaging RGB data later on, you will load the Ha as Ha in the RGB Combine module, and the RGB as the three red, green and blue channels, and using the HaRGB algorithm in the combine module.

That is how i would process this.

 


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(@paul-grace)
White Dwarf Customer
Joined: 4 years ago
Posts: 28
Topic starter  

Many Thanks Andy

 

I'll do it now with 5 of each files to save a bit of time 🙂


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(@paul-grace)
White Dwarf Customer
Joined: 4 years ago
Posts: 28
Topic starter  

🙂

 

Great progress

This is 5 subs and supporting docs as done with Andy's advice 🙂

Now to do the full stack which includes a flip about 15 subs into the session..
here goes.

Be Right back 🙂

5 frames  Hydrogen alpha session 1 St

 


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(@paul-grace)
White Dwarf Customer
Joined: 4 years ago
Posts: 28
Topic starter  

THANK YOU Wouter & Andy.

 

Just a simple thing but if you dont know you dont know 🙂

 

I'm very very happy with the result and was getting nowhere until you both helped

THANK YOU both again 🙂

Full Hydrogen beta session 1 St

 


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(@andybooth)
White Dwarf Customer
Joined: 11 months ago
Posts: 30
 

@paul-grace glad to help. Thats a great result! Well done!

i did exactly the same routine on the same object.

the Ha provides the detail and the RGB the colour.

Its a great combo for this type of object that is Ha rich.

2E2A4FC5 B30F 4C01 964F 1EF57A23C17C
C1F817D7 FB25 4645 91C4 E5B98E0A68B2

 


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