2025/12/29 - Unusual Palettes of The Heart of M42

[dusk magnet]

The Heart of M42 in two different palettes : IRGB and IR-SynG-B.

C8, Uranus-C, ZWO UV/IR-Cut & TS Optics IR720 filters at 2032mm f/10, 0.29"/px.

[ancient elbow]

Amazing! What was the acquisition for the image?

[dusk magnet]

30 mins of 2 secs exposures for each.

[gaunt girder]

bro the images would be so much sharper if you did like 100ms expotures. thats what i do. and if you really want. you can do longer expotures for the actuall snr/data. but do 100ms for the details

amazing images btw

[remote mortar]

Magnificent

[stiff cargo]

Beautiful !

[dusk magnet]

You won't pick much with 100ms subs.

And i'm not far from the limit there.

[gaunt girder]

Yes you do.

I always use 100ms subs on orion

[dusk magnet]

Show image

[gaunt girder]

Wait i have it on my computer. 1 seg

[dusk magnet]

I swear if it's worse

[gaunt girder]

Sec*

[gaunt girder]

Bro ofc its worse. Orion is never more than 20° above horizon here and I have dogshit seeing

[dusk magnet]

Then why allat yapping ?

[gaunt girder]

Cuz im just saying that your image would be better if you used shorter subs?

[dusk magnet]

Yeah but it ain't true

[gaunt girder]

It would be sharper?

[dusk magnet]

Not if the seeing and tracking are good

Which they are

Especially in IR.

[gaunt girder]

I mean ig if you have good seeing

[gaunt girder]

this was 100ms expotures for 30sec from b7-8.

imagine what like 1h would look like from b3

[dusk magnet]

What wavelength is that ?

[gaunt girder]

685

[dusk magnet]

About the same res as me

[gaunt girder]

I had horrible seeing tho

[dusk magnet]

That's not true

Given your stars

[gaunt girder]

Below average

[dusk magnet]

Anyway, reducing the exposure time won't make it noticably sharper

[gaunt girder]

Lucky imaging

[dusk magnet]

Lucky imaging is only worth it under certain asumptions

[gaunt girder]

also here was 100ms expotures for 3min in vis

big lightleak tho

[gaunt girder]

wdym?

[dusk magnet]

Read that again

[gaunt girder]

so lucky imaging only works with bad seeing?

[dusk magnet]

What an absolute pain to debate here

[gaunt girder]

im not debating im just trying to learn lol

[dusk magnet]

Not really, but for dimmer targets with good seeing it's not that better

[gaunt girder]

the orion nebula is not a dim target. but seeing i get yeah

[dusk magnet]

By that i meant not planetary type of surface brightness

[gaunt girder]

isnt orion brighter than uranus?

[dusk magnet]

'surface brightness'

[gaunt girder]

the surface brightness of the terapizium part is what im reffering too

[dusk magnet]

Even that

https://tenor.com/view/csgo-banging-table-angry-mad-rage-quit-gif-17478101

At each one of your comments

[gaunt girder]

😭

Im just trying to learn bro

[dusk magnet]

Thing is that you are missing most of the things to properly learn the subject.

[gaunt girder]

I am reading everything that you are saying

[dusk magnet]

So each one of our discussions is an absolute pain cuz you have not much idea of what we're talking about.

[gaunt girder]

Yeah thats why im trying to learn lol

[dusk magnet]

Then stop arguing and just listen.

[gaunt girder]

Ye mb

[dusk magnet]

You can ask questions but stop trying to start a debate on everything.

[gaunt girder]

Ye

[dusk magnet]

To sum it up : no, shorter exposures won't give a noticably sharper image. Why ? Two reasons. First, you don't pick enough signal with short exposures, which limits you when you want to apply sharpening filters such as wavelets. And when you are like me (i don't have much time per target cuz i'm imaging between trees), you prioritise SNR. Second, to make a good image, you need good seeing, and lucky imaging won't really help you overcome your bad seeing. And with that good seeing (and good tracking) you can use more exposure time to gain SNR without losing too much res from seeing.

Sorry if i'm writing like shi i'm on my phone.

[gaunt girder]

Ah. Thats quite intresting actually. Thanks

[gaunt girder]

@dusk magnet this has to be a worlds first

[dusk magnet]

what is that

[gaunt girder]

My image with a color pallete o came up with

I*

[dusk magnet]

what settings ?

[gaunt girder]

Uhm vis for blue ir for green and duoband for red i think?

[dusk magnet]

Cursed

[gaunt girder]

Ye ik

I just wanted a unique pallete

[dusk magnet]

Try balacing it

[gaunt girder]

ye

its just the duoband is alot more data

like ALOT

[dusk magnet]

Shouldn't really matter

[gaunt girder]

ir vs duoband

duoband was 1 sec subs

[dusk magnet]

is that badly stretched or u just blew out the core ?

[gaunt girder]

Blew it out

[cloud halo]

Got any H-alpha data? You get amazing colors with Chicago palette (IHH)

[gaunt girder]

is it ir ha and what more?

[cloud halo]

Just the two

[gaunt girder]

Oh yeah I saw that image

Actuslly why I bought an ir filter

That exact image

But why is it IHH and not IH?

[cloud halo]

I still need way more IR int

[cloud halo]

H is mapped to green and blue

[gaunt girder]

Oh

[cloud halo]

You could also do IIH

[gaunt girder]

Ye

[dusk magnet]

Yeah i got Ha, OIII and even some He I at ~580nm, but it's from a smaller scope with a lot less resolution.

IHH is nice but i was searching something with a RGB style, more different colors.

[cloud halo]

Here's IHO

[dusk magnet]

I would love to make a complete IR-SynG-B of the whole neb.

[cloud halo]

Oh I missed the RGB style part oops

[gaunt girder]

what is synG?

[dusk magnet]

Synthetic green, created by averaging R and B.

It's commonly used by the processing team of Hubble.

Especially for IR comps, which more than often look weird with three color mapping.