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Technical Aspects of the Triad Ultra Filter

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#26 nateman_doo

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Posted 19 May 2019 - 10:45 AM

Excellent. I'm looking forward to objects like the veil, crecent, filamentary and things of that nature coming back up again to try the filter out with.

#27 johnsoda

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Posted 19 May 2019 - 03:04 PM

I've worked on the light-pollution gradient a bit (actually, it's largely a lunar-light gradient):

 

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Here are the separate channels, stretched the same:

 

R

 

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G

 

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B

 

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Edited by johnsoda, 19 May 2019 - 08:31 PM.

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#28 johnsoda

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Posted 09 July 2019 - 05:02 PM

Veil Nebulae region.  Click on small image for better quality image and acquisition details.

 

get.jpg?insecure

 

Veils_small.png

 

 


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#29 nateman_doo

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Posted 09 July 2019 - 08:05 PM

currently tackling the crescent with this filter.  Already a single 10 minute sub looks better than my 7 hour stack.

 

U8Mltrmh.jpg

 

This is my first real attempt with it.


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#30 johnsoda

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Posted 09 July 2019 - 08:13 PM

currently tackling the crescent with this filter.  Already a single 10 minute sub looks better than my 7 hour stack.

 

 

 

This is my first real attempt with it.

I’m trying the Crescent, too, although I see clouds moving in. 



#31 johnsoda

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Posted 09 July 2019 - 08:14 PM

It really is an amazing filter, although they ain’t giving them away. 



#32 johnsoda

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Posted 13 July 2019 - 01:13 PM

Click on small image for a better quality image and acquisition details.

 

get.jpg?insecure

 

 

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#33 Im2bent

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Posted 13 July 2019 - 01:44 PM

Spent a little more time on the Seagull. 

 

get.jpg?insecure

Simply stunning. As a beginner with no filters,wheels or any NB equipment I think this might be the way for me to go. I have an SXVR-H694C its osc and the reduced workflow and ease are just what the doctor ordered for a newbie and as said total cost when considering high end filters is equivalent or less. I would not have to store or fiddle with a bunch of separate filters and a wheel. And way less processing of which I know nothing? Hell yeah!! If I ever take a pic like that i would consider the AP aspect of my bucket list to be complete.


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#34 johnsoda

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Posted 13 July 2019 - 02:46 PM

Simply stunning. As a beginner with no filters,wheels or any NB equipment I think this might be the way for me to go. I have an SXVR-H694C its osc and the reduced workflow and ease are just what the doctor ordered for a newbie and as said total cost when considering high end filters is equivalent or less. I would not have to store or fiddle with a bunch of separate filters and a wheel. And way less processing of which I know nothing? Hell yeah!! If I ever take a pic like that i would consider the AP aspect of my bucket list to be complete.

Thanks.  There is no doubt it’s simpler. If you have the filters and the filter wheel and a mono camera, doing it that way isn’t that bad, once you get the hang of it, but having one set of lights, flats, and one focus point is definitely simpler. 


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#35 johnsoda

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Posted 13 July 2019 - 07:48 PM

Using the 2” Triad with my relatively new Redcat. I have it in a Baader filter holder. 

 

 

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#36 johnsoda

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Posted 14 July 2019 - 09:26 AM

And the results from last night. I think this is a really nice wide-field, narrowband setup. Easy to setup, reliable, easy to process, autofocus runs flawlessly.  I slept all through the acquisition. 

 

Click on the small image for a better quality image and acquisition details. 

 

get.jpg?insecure

 

 

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#37 nateman_doo

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Posted 15 July 2019 - 07:03 PM

3 hours of the crescent (out of 6)

lGFlSX1h.jpg

 

Taken on a rifle range:

0vmoZOlh.jpg

 

next morning... I woke up to crazy moisture!

wsXQfX5h.jpg

 

does anyone use bias with this filter?  I can't seem to use bias correctly no matter what I try.


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#38 johnsoda

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Posted 15 July 2019 - 07:34 PM

3 hours of the crescent (out of 6)

 

 

Taken on a rifle range:

 

 

next morning... I woke up to crazy moisture!

 

 

does anyone use bias with this filter?  I can't seem to use bias correctly no matter what I try.

Looks pretty good to me. What’s the problem?



#39 nateman_doo

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Posted 15 July 2019 - 07:38 PM

Not really a problem. Needs more data to make the noise go away.

Just curious why bias images take everything out of the image.

#40 nateman_doo

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Posted 16 July 2019 - 07:59 AM

But to give you guys a point of reference of what the filter does... here is my evolution of the crescent nebula with the exact same setup with an optolong moon and skyglow filter:

 

 

obgpMIfh.jpg

uxL9V2Oh.jpg

7hCQlQLh.jpg

c5zEEYEh.jpg

 

Some of these have 7 hours worth of subs

 

 

And finally with the triad:

lGFlSX1h.jpg

3 hours and 20 minutes worth.  (just flats and darks.  Still attempting to integrate bias frames)

 

I am still working with the data to see what else I can get out of it.  Picture was taken during a 70% illuminated moon, and CRAZY humidity (as shown in post #37)


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#41 nateman_doo

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Posted 16 July 2019 - 08:04 AM

With, and without side by side for comparison: 

 

lGFlSX1m.jpgobgpMIfm.jpg


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#42 johnsoda

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Posted 22 July 2019 - 05:04 PM

Latest. Click on small image for better quality image and acquisition details. 

 

get.jpg?insecure

 

 

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#43 nateman_doo

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Posted 23 July 2019 - 08:44 PM

Optolong Moon and sky glow (5 hours worth of subs) under great skies in PA

NN6D65Dh.jpg

ft8kDyUh.jpg

2 hours with the basic Triad filter under soupy skies

 

 


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#44 johnsoda

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Posted 27 July 2019 - 10:58 AM

Bubble Nebula. First use of the ASI183MC with the Triad. Click on the small image for a better quality image and acquisition details. 

 

get.jpg?insecure

 

 

 

 

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#45 nateman_doo

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Posted 27 July 2019 - 03:41 PM

I think I can stick a fork in the filamentary nebula:

HbZ82Rf.jpg

 

I think its done.  Not sure why the diffraction spikes have such a rhythmic pattern red/blue/red/blue etc  Looks so artificial, but I am finally getting some star colors back with shorter exposures.


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#46 telfish

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Posted 27 July 2019 - 07:45 PM

Do you process the subs like a normal one shot color camera? Are there any tips on processing.



#47 johnsoda

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Posted 27 July 2019 - 07:54 PM

Do you process the subs like a normal one shot color camera? Are there any tips on processing.

 

Yep, that’s one of major appeals of this filter. One set of flats, one set of lights, and minimal processing. I often do photometric color calibration, but it’s not necessary. 


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#48 nateman_doo

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Posted 28 July 2019 - 05:51 PM

Makes me wonder how much better the quad band triad is. John, have you done any targets with the tri band vs the quad?

#49 johnsoda

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Posted 28 July 2019 - 06:20 PM

Makes me wonder how much better the quad band triad is. John, have you done any targets with the tri band vs the quad?

 

Don’t have the tri-band, just the quad. 



#50 Tothemoonalice

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Posted 28 July 2019 - 07:36 PM

I have a new camera, the ASI071MC Pro, that I'm using with my SVX70T and the Triad.  I think this is a very good combination for narrowband.  Here are some initial results from a project I'll be working on over the next few months, especially during bright-moon periods.  I think I have the framing where I like it.  Overall, it looks good, although I do need to work on the field flattening.  Note especially the lower left corner.  It doesn't affect the overall aesthetics of the image much, but I think I can do better.  Click on the small image for acquisition details and a better quality image.

 

get.jpg?insecure

 

attachicon.gif NA_small.png

Hello, do you use the triad filter also when there is not a lot of light pollution? Is the triad only for when there is a bright moon or plenty of city lights? THANK YOU VERY MUCH FOR YOUR RESPONSE.




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