Partial Narrow Band Question

[JimFox]

This just came to me as I have been starting to study up and read about Color and Mono Astro cameras.

Currently I am shooting with my Nikon D850 that isn't modified, it picks up a decent amount of Ha, but not as much as a dedicated Astro camera obviously. If I got a Mono Astro camera and for simplicity to start, just used it with the Ha filter and processed just that. Would the result be similar to a dedicated Color Astro camera? Or would it be similar but better then I get from Nikon D850?

I am not saying if I got a Mono camera I would shoot it in just Ha, but trying to see what it would look like in color. Mike posted his recent imaging that was from Ha, but it's only presented in B&W, so I can't tell what the color result would be.

Thank you for humoring me.

 

[chuckp]

You can probably add the Ha to your nikon image to bring out more of the reds. If you try to make a color image by just using the Ha data alone you will only get different shades of red or green or blue not a true color image.

 

[JimFox]

You can probably add the Ha to your nikon image to bring out more of the reds. If you try to make a color image by just using the Ha data alone you will only get different shades of red or green or blue not a true color image.

Thanks Chuck. There is so much to Astrophotography, and I am getting to a place where I think I can start wrapping my brains around some of it. The first year was just kind of doing it, and maybe not totally understanding it.

 

[Gramps Potter]

This just came to me as I have been starting to study up and read about Color and Mono Astro cameras.

Currently I am shooting with my Nikon D850 that isn't modified, it picks up a decent amount of Ha, but not as much as a dedicated Astro camera obviously. If I got a Mono Astro camera and for simplicity to start, just used it with the Ha filter and processed just that. Would the result be similar to a dedicated Color Astro camera? Or would it be similar but better then I get from Nikon D850?

I am not saying if I got a Mono camera I would shoot it in just Ha, but trying to see what it would look like in color. Mike posted his recent imaging that was from Ha, but it's only presented in B&W, so I can't tell what the color result would be.

Thank you for humoring me.

Hi Jim, when I can get to my computer, I can send you a color—red —-version of the HorseHead I did in Ha only and then assigned that data to the red channel. This version I left in black and white.
CS

 

[JimFox]

Hi Jim, when I can get to my computer, I can send you a color—red —-version of the HorseHead I did in Ha only and then assigned that data to the red channel. This version I left in black and white.
CS


View attachment 39742

That looks cool in B&W. If you can post the Ha color version here that would be helpful to me, and also could be educational for others too.

Thanks so much!

 

[Gramps Potter]

That looks cool in B&W. If you can post the Ha color version here that would be helpful to me, and also could be educational for others too.

Thanks so much!

Definitely will when I get back to WiFi land !

 

[Mike Lewis]

Jim,

Already answered, but the short answer is, Hα is not visible in the spectrum our eyes see. An unmodified camera will respond to it to some extent, and a modified camera or dedicated astro camera will pick it up much more efficiently. Since it is off the red end of the spectrum, it is often mapped to that color, and a modified or astro camera that is a OSC (one shot color) camera will display it as extra signal in the red channel typically.

I have an image I will post right after this (the target you mention above) and I have mapped that Hα signal to the red channel in that one.

ML

 

[Gramps Potter]

That looks cool in B&W. If you can post the Ha color version here that would be helpful to me, and also could be educational for others too.

Thanks so much!

Hi Jim, finally found my Ha Horse Head ! I assigned it to the red channel in Pixinsight. Hope this helps !

 

[JimFox]

Hi Jim, finally found my Ha Horse Head ! I assigned it to the red channel in Pixinsight. Hope this helps !
View attachment 40044

That's very cool and very helpful! I am glad you found this. It looks pretty sweet with that red channel.