M83 a little overdone

Flugel88 (Michael) · #1 06-04-2015, 05:40 PM

I've just spent the entire day trying a completely different processing method for my images using CCD stack and Photoshop.

I had to contend with some terrible vignetting but i think i've managed to get it as good as it will get.

I did do allot of cropping chopping lost about 30% of edges from coma and the vignetting.
I also really cranked the saturation up i guess some people would think its a little to cooked but i like really do like it that way

.

Hope you like it please share any thoughts (improvement ideas)

For a better look
http://www.astrobin.com/170113/ cropped.
http://www.astrobin.com/170110/ full version.

meade lxd75 sn-8
F4
Atik 383L at -15
4X600 each of RGB
10x600 Lum
DARKS/BIAS/FLATS

BruceG (Bruce) · #2 06-04-2015, 06:37 PM

I like the emphasized colour. In my opinion, the beauty of M83 is its wonderful reds and blues (apart from the dust lanes). Very nicely done.
I had a look at the full frame version and I like it - kind of more in its environment.
Cheers, Bruce.

chuckywiz (Ben) · #3 06-04-2015, 06:58 PM

i like it a lot.. nicely done

raymo · #4 06-04-2015, 09:32 PM

That's a ripper. Main section material.
raymo

willik (Willik) · #5 07-04-2015, 12:07 AM

Quote:

Originally Posted by Flugel88

I've just spent the entire day trying a completely different processing method for my images using CCD stack and Photoshop.

I had to contend with some terrible vignetting but i think i've managed to get it as good as it will get.

I did do allot of cropping chopping lost about 30% of edges from coma and the vignetting.
I also really cranked the saturation up i guess some people would think its a little to cooked but i like really do like it that way

.

Hope you like it please share any thoughts (improvement ideas)

For a better look
http://www.astrobin.com/170113/ cropped.
http://www.astrobin.com/170110/ full version.

meade lxd75 sn-8
F4
Atik 383L at -15
4X600 each of RGB
10x600 Lum
DARKS/BIAS/FLATS

One thing to say excellent and a top camera Atik

nebulosity. (Jo) · #6 07-04-2015, 06:47 AM

Very nicely done! The saturation is good with a nice black background

There is a slight amount of black ringing around some of the stars in the galaxy (generally an artefact from sharpening or decon) if it worried you it can be avoided by masking out the stars when sharpening or decon is applied.

Over all, great stuff

Cheers
Jo

RickS (Rick) · #7 07-04-2015, 07:52 AM

Nicely done, Michael. I don't think it's oversaturated at all.

Cheers,
Rick.

Flugel88 (Michael) · #8 07-04-2015, 10:41 AM

Thanks guys i'm happy you all like the intense saturation.

I think it really does work well with M83 brings out the structure in the arms.

Quote:

Originally Posted by willik

One thing to say excellent and a top camera Atik

Willik your old Atik is a real gem best thing i ever brought thanks mate.
The chip size is perfect for me.

Quote:

Very nicely done! The saturation is good with a nice black background

There is a slight amount of black ringing around some of the stars in the galaxy (generally an artefact from sharpening or decon) if it worried you it can be avoided by masking out the stars when sharpening or decon is applied.

Over all, great stuff

Cheers
Jo

Thanks Jo your right i think those artifacts are from decon i pumped it up to 50 iterations with out any masking at all.
Except for the sharpening i used photoshops magic wand for all my sharpening and noise reduction and stretching and a little high pass.

rustigsmed (Russell) · #9 07-04-2015, 10:49 AM

nice one Michael -

I like the full version. I probably wouldn't have had the back ground as dark but it certainly makes the galaxy pop out.

Flugel88 (Michael) · #10 08-04-2015, 01:41 PM

I have added some images of the problems i encountered with processing this image.
Would appreciate any thoughts in what i might been doing wrong to cause these or if they are just unavoidable.

First is the terrible vignetting i get as you can see from the full frame image.
I had applied 25 flats for each filter taken with the optical system setup identical to the acquisition moment. ie focus rotation and temp.

The other is an odd artifact that's started appearing in my images of late that moves around. could be a problem with my camera

John K · #11 08-04-2015, 04:50 PM

That's a nice image Michael,

You may be able to overcome the issue you are having with your stars by simply doing some start shrinking. You can do this for all starts or select the bigger stars - I use Photoshop plug ins to help with these.

Also lots of tools around that can also help with reducing the elongation of the stars which appear either as coma or vignetting.

You also simply crop the image.

In terms of colour / colour saturation, here is another interpretation:

https://www.flickr.com/photos/johnka...n/photostream/

- it's all a personal choice I think.

Overall, a nice result, which with some image tweaking can get even better for you!

clear skies,

John K.

Joshua Bunn (Joshua) · #12 09-04-2015, 12:59 AM

Quote:

Originally Posted by Flugel88

The other is an odd artifact that's started appearing in my images of late that moves around. could be a problem with my camera

This is an internal reflection within the optical train. I wouldn't say this is a problem with your camera. I had a lx200 ACF that had reflections similar to this.

guggle (Michael) · #13 10-04-2015, 03:28 PM

That's a very nice photo - I'd be very chuffed with that if it were mine!

cometcatcher (Kevin) · #14 10-04-2015, 04:59 PM

I like it! All the little galaxies in the background too.

Flugel88 (Michael) · #15 10-04-2015, 07:22 PM

Quote:

That's a nice image Michael,

You may be able to overcome the issue you are having with your stars by simply doing some start shrinking. You can do this for all starts or select the bigger stars - I use Photoshop plug ins to help with these.

Also lots of tools around that can also help with reducing the elongation of the stars which appear either as coma or vignetting.

You also simply crop the image.

In terms of colour / colour saturation, here is another interpretation:

https://www.flickr.com/photos/johnka...n/photostream/

- it's all a personal choice I think.

Overall, a nice result, which with some image tweaking can get even better for you!

clear skies,

John K.

Thanks for the input John.

I really do need to get some PS plugins my stars are very rough plus my Schmidt Newtonian seems to produce very large and slightly bloated stars i think.

I used the trial of star Tools and tried the repair function.
Seemed to work well in reducing my coma and star issues but i wasn't really sure if its worth the $60 just for that as all the the other functions i could do in PS and CCD stacker.
The trial doesn't allow you to export files.

I'm still kinda learning with PS ATM though i've only just started to get my head around proper masking.

I like your flickr M83 very nice tight and neat looking stars.
I didn't know you could get such a nice result from a DSLR i guess being F5 12.5" would help a little for such a target.

Flugel88 (Michael) · #16 10-04-2015, 08:29 PM

Thanks Keven and Michael for your comments.

Quote:

Joshua Bunn Originally Posted by Flugel88 http://www.iceinspace.com.au/vbiis/i...s/viewpost.gif
The other is an odd artifact that's started appearing in my images of late that moves around. could be a problem with my camera

This is an internal reflection within the optical train. I wouldn't say this is a problem with your camera. I had a lx200 ACF that had reflections similar to this.

That would kinda make sense as i only noticed them after my last attempts to properly collimate my scope. The odd thing is that it only shows up in with my blue filter and some of my Luminance subs.

MGTechDVP (Mariusz) · #17 11-04-2015, 03:52 AM

You guys are coming up with some great looking M83s... This is the second one in this list that caught my eye... great work.