Heart Nebula Widefield

[lucid hamlet]

Around 200x60s with 585mc pro and FMA 180 Pro , using duoband filter sv220 from SV bony. (Could have done better focus was slightly off maybe or seeing was bad)

[bold crag]

I think its been more of a focus thing.
U can see donuts at some stars
I like the colors tho!

[lucid hamlet]

hm weird i used a bathinov mask for focus

[lucid hamlet]

yeee

didnt get into astrophotography for past month so have to learn again

will do a better picture on Crescent nebula later this week

[bold crag]

Do u have a dew heater band on the scope?

[lucid hamlet]

yes

[bold crag]

Maybe wait a bit after its on
Could be that tge focus shifted as the lens heated up (just a guess tho)

[idle silo]

Please don't tell me you used SCNR

[lucid hamlet]

they dont relly seem to have bad focus on the single images

[lucid hamlet]

Uhhhh

I used "Remove green noise" in siril

is that SCNR?

might be a bad edit thing?

[idle silo]

Yep

[bold crag]

Is that an early frame? Maybe focus shifted over the night

[lucid hamlet]

I used SCNR than why is that bad?

[idle silo]

It destroys the data

[lucid hamlet]

focus doesnt seem to shift really just slightly

[bold crag]

Hmmm

[lucid hamlet]

how so o-o

this is a screenshot of the last frame

i will redo the edit something is fishy

[lucid hamlet]

the stars here look better irght?

this is the autostreetched image after streetching

[lucid hamlet]

but dont i kinda have to use SCNR when using a OSC with more green pixels in bayer matrix?

[bold crag]

Imo theyre sharper in the first one, tho the difference is barely noticeable in a single pic

[lucid hamlet]

yea they are almost 4h apart so i dont think that focus shifted

[idle silo]

The channel with the highest SNR is the green channel. When you run SCNR, the green channel gets clipped down to the average value between Red and Blue... literally destroying the data

[lucid hamlet]

well how do i cope with too green images? just use color calibration?

I mean it doesnt really matter with duo narrowband

but with broad band it does kinda

[idle silo]

If you want, share the data. I would love to process it

[lucid hamlet]

sure

[bold crag]

I think color calibration or linear fit would work

[lucid hamlet]

Just the stacked Data no edits done not even cropped

used duo narrowband filter so you will have to subtract Ha and Oiii from Red channel and Blue / Green

[lucid hamlet]

if you processed it u can ping me and share results here i really wanna know what it looks like when someone else processes it

[idle silo]

Here's an example of some data I processed for someone. SCNR wasn't even touched with a 10 foot stick😂 😂

[lucid hamlet]

oh how did you get such nice colors then? just color calibration or did you streetch the channels seperately?

[idle silo]

I align the channels manually.

[lucid hamlet]

just align the peaks ?

i will try redoing my edit too

i did realize that Green channel was a bit weak that might have been due to the SCNR

[idle silo]

@lucid hamlet

[lucid hamlet]

well that looks certainly a lot nicer

[idle silo]

I tried to get to a nice classic HOO

[lucid hamlet]

i tried to get the seperation between Oiii and Ha a bit more

[lucid hamlet]

what formula did u use pixel math wise?

[idle silo]

No pixel math

[lucid hamlet]

wait did you just? just use the raw data? without splitting channels?

[idle silo]

yes, i only extracted the stars

[lucid hamlet]

alright

did you use noiseX and BlurX?

[idle silo]

yes, low values

[lucid hamlet]

alright i only have free software so siril and graxpert

i will try another better edit without SCNR

[idle silo]

i reccomend that you completely forget about SCNR

[lucid hamlet]

no one ever gave me that advice 2bh

But it seems reasonable, since it does remove green singal for no reason and i can just do the colors manually

so thanks for the advice will remove SCNR from my tools

[idle silo]

Do you know how much it pains me to see some people nuke their hard work SHO with SCNR? Literally destroying valuable Ha signal

[lucid hamlet]

rip thats bad

wait why does it destroy Ha and not Oiii ?

[idle silo]

Because in SHO,
SII -> Red
Ha -> Green
OIII -> Blue

[lucid hamlet]

oh right i forgot SHO had Ha in Green

Got it mixed up with HSO

[idle silo]

so Ha is assigned to the Green channel and the image turns obscenely green

[lucid hamlet]

btw i have quick question when i split my channels Ha and Green and Blue can i just pixel math Green and Blue 50/50 together and call it my Oiii?

[lucid hamlet]

haha

yea

i like a bit of green in SHO though

doesnt have to be only golden and blue for me

[idle silo]

Green in SHO is literlally signal

[lucid hamlet]

Yeaaa

can i still use SCNR when i shoot Andromeda in Broadband? green isnt really signal then is it?

[idle silo]

Have a look around this channel #puresho

[lucid hamlet]

or is that a bad idea?

[idle silo]

TBH, i never tried to tread OSC data as Mono data.

[lucid hamlet]

alright still thx for ur help

[idle silo]

You can try this formula to combine the G and B to get OIII 0.95*G + 0.45*B

[lucid hamlet]

oh why is it more than 100% ? 0.95 + 0.45 ?