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M33 at last

Rodd

By Rodd
in Imaging - Deep Sky

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Rodd

Rodd

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I was never satisfied with my L(Ha)R(Ha)GB of M33.  I over processed the darn thing every time I had a go at it--which was too often to count.  I fell into the same gopher hole every time.  The data was excellent, however--each stack looked great, so I had another go after a much needed break from it.  I think I am satisfied.  My main goal was not over processing, and depicting that soft glow that is  commonly seen in galactic images.

TOA 130 at F7.7, STT 8300

Red: 31 10m min

Green 31 10 min

Blue 19 10 min

Ha 10 30 min

HaLRGB-1b.thumb.jpg.7b0c2c02cf0f5fd641839254b34b37c0.jpg

 

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MarsG76

MarsG76

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26 minutes ago, Rodd said:

Thanks Mars--As long as its not too red!  Delicate balance...not my strong suite!

Rodd

It might be slightly red on my work monitor, but it could be the display.. I find that the best representation of levels and colors are on my iPhone when screen is at full brightness, believe it or not... I imagine its the same for all modern smart phones... have a look on the phone screen, you'll be surprised how much either better a image looks or how much level inaccuracies it shows up.

Either way, it looks great.

 

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bobro

bobro

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1 hour ago, Rodd said:

L(Ha)R(Ha)GB

Super M33! Could you explain a bit more about the Ha and Red exposures - times for these are different but my limited understanding would expect them to be the same as Ha is presumably used for Red?

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Rodd

Rodd

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3 hours ago, MarsG76 said:

It might be slightly red on my work monitor, but it could be the display.. I find that the best representation of levels and colors are on my iPhone when screen is at full brightness, believe it or not... I imagine its the same for all modern smart phones... have a look on the phone screen, you'll be surprised how much either better a image looks or how much level inaccuracies it shows up.

Either way, it looks great.

 

Yes...I agree.  On my iPhone images look amazing.  I think some of it is the screen size.  But I love looking at astrobin photos on my iPhone or ipad.

Rodd

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Rodd

Rodd

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3 hours ago, carastro said:

Very nice, and it reminds me I need to do this target again to try to improve on last time. 

Carole 

Thanks Carole.  That's the beauty of AP--everytime I image a target its different somehow.  Be nice to string together a few reslly good nights so that all the data is good for a change!

Rodd

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Rodd

Rodd

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2 hours ago, bobro said:

Super M33! Could you explain a bit more about the Ha and Red exposures - times for these are different but my limited understanding would expect them to be the same as Ha is presumably used for Red?

Thanks Brobro.  Broad band is a bit different than narrowband.  Ha typically takes longer to collect, and its pretty impervious to light pollution so the sky fog limit is taken out of the equation.  I usually take 30 min Ha subs.  But 1 hour subs for Ha are doen by some.  When adding Ha to the red channel and to the lum channel, only a percentage of it is added usually--otherwise the image would look too red.  The long subs ensure a clean signal so noise is not added to the image.

Rodd

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Rodd

Rodd

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I suppose it would not be complete without one last modification.  A touch of fine scale sharpening to reveal individual stars in the spiral arms.  Still not sure about the blue level--but that is easy to change.

HaLRGB-1d3.thumb.jpg.169e91a974418c6d21cc128b68640683.jpg

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graemlourens

graemlourens

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Hi Rodd.

A very very nice image... You have inspired me to re-evaluate my own M33, and certainly yours has become a role model image when i start reprocessing!

The subtle touch to it makes it seem so realistic as one would be looking at it with ones own eyes.

Kind regards, Graem

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Rodd

Rodd

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56 minutes ago, graemlourens said:

Hi Rodd.

A very very nice image... You have inspired me to re-evaluate my own M33, and certainly yours has become a role model image when i start reprocessing!

The subtle touch to it makes it seem so realistic as one would be looking at it with ones own eyes.

Kind regards, Graem

Wow..Thanks Graem.  I appreciate the kind words and look forward to seeing your M33

Rodd

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Rodd

Rodd

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24 minutes ago, Adam J said:

Rod if you did not give us at least 8 verions then it would not be you ;)

Latest Version looks fantastic, not going to be easy to improve on that without ending up on the slippery slope towards over processing. 

Adam

Thanks Adam, and you are correct--that is the last one.  I don't want to fool with it anymore.  

Rodd

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