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Old 07-08-2020, 12:52 PM
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John K
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M16 Narrowband close up - 27 hours

Hi everyone,

My go at an M16 Narrowband close up.

27 hours of Ha, Oii and Sii from lock-down central here in Brunswick with 4.5nm filters, AP 900 mount, 9.5" CDK scope, ASI 1600mm camera, all 30 min exposures.

This is actually my first ever full Narrowband image after having these filters for 2 years although I have been using the Ha filter for other images - propbly the only astronomical benefit of being in lock down!

Still a bit of work to do on the colour and I will try to do a full Hubble Pallete.

A real adventure in masks, colour adjustments, layers, star management, dealing with light pollution and street light gradients all whilst processing in PI and CS3.

Can spend several more weeks processing this object!

Stay safe and healthy.

John K.
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Last edited by John K; 07-08-2020 at 01:54 PM.
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Old 07-08-2020, 01:07 PM
DarkArts
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Fantastic image.

I like the palette - I'm not sure what a "full" Hubble palette would change (then again, I've not yet used it).
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Old 07-08-2020, 04:09 PM
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graham.hobart (Graham stevens)
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m16

that is pretty lovely John!!
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Old 07-08-2020, 04:11 PM
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multiweb (Marc)
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Wow, what a beaute shot. Outstanding details and dynamic range and light is spot on. Sub zero cool.
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Old 07-08-2020, 04:43 PM
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That's a high quality Eagle image John. Congrats.

Greg.
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Old 08-08-2020, 11:38 AM
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Quote:
Originally Posted by gregbradley View Post
That's a high quality Eagle image John. Congrats.

Greg.
Thanks Greg - appreciate it.

Quote:
Originally Posted by multiweb View Post
Wow, what a beaute shot. Outstanding details and dynamic range and light is spot on. Sub zero cool.
Thanks Marc

Quote:
Originally Posted by graham.hobart View Post
that is pretty lovely John!!
Thanks Graham.

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Originally Posted by DarkArts View Post
Fantastic image.

I like the palette - I'm not sure what a "full" Hubble palette would change (then again, I've not yet used it).
Thanks DarkArts - I would like to blend in some more of the Green wisps that we see in the Hubble Pallette on the net - quite subjective I guess.
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Old 08-08-2020, 12:11 PM
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30 minute exposures???? such a smooth image
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Old 08-08-2020, 04:56 PM
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Excellent!
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Old 08-08-2020, 05:14 PM
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Nice work John.
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Old 08-08-2020, 05:43 PM
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As a fellow Brunswickian I salute this effort. I've been collecting a bit of M16 data at my remote site, I should pull it out and process some of it!
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Old 09-08-2020, 07:53 AM
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strongmanmike (Michael)
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Interesting result John looks pretty good, nice work from the bright skies of downtown Brunswick

Mike
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Old 11-08-2020, 12:50 PM
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Interesting result John looks pretty good, nice work from the bright skies of downtown Brunswick

Mike
Thanks Mike - yeah..not bad from the centre of Melbourne I guess, was surprised myself

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Originally Posted by jamespierce View Post
As a fellow Brunswickian I salute this effort. I've been collecting a bit of M16 data at my remote site, I should pull it out and process some of it!
Hi James - handy to have a remote site these days

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Nice work John.
Thanks Rodney

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Originally Posted by ChrisV View Post
Excellent!
Cheers Chris

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30 minute exposures???? such a smooth image
Thanks Nik - yep at f/7 and 4.5nm seems to work ok for my set up
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Old 13-08-2020, 10:52 AM
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...and a starless version.

My first attempt at doing a starless image in fact - is it more art than science? Don't know! but it sure is an amazing object and the inter-galactic cloud features of M16 are really amazing and 3D like.

As per original image made up of 27 hours of Ha. Oiii, Sii with an AP900 mount, 9.5" CDK, AS1600mm camera. Used a variety of methods for this including star masks, PI and tone mapping in Photoshop.

Clear skies.

John K.
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Old 13-08-2020, 04:23 PM
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Atmos (Colin)
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27 hours on a kinda brighter Nebula, that’s why it’s so smoooooooth!.
Very nice John
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