#1  
Old 23-08-2020, 04:34 PM
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Slawomir (Suavi)
Going visual

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Toss a coin

Hi all,

While dreaming of a larger aperture, as most of us do, I thought of having another go at one of the larger galaxies with my 105mm guidescope. Data was acquired over a couple of weeks and it adds up to just over 2 days worth of exposure, so I pushed the histogram pretty hard.

I could not get PI to get Photometric Colour Calibration tool to do a reasonable job, so I was left to manually push the controls. From the final result, I see I certainly have some way to go in the department of LRGB processing.

Full resolution version: https://a4.pbase.com/o12/75/1404475/...a5.NGC_253.jpg

Thank you for looking
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  #2  
Old 23-08-2020, 04:43 PM
PaulSthcoast (Paul)
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Suavi,

That is an amazing image !

Thanks for sharing.

Paul.
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  #3  
Old 23-08-2020, 05:12 PM
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Atmos (Colin)
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Fair number of galaxies in the field which you’ve done well to capture, exposure time definitely helps in that regard
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  #4  
Old 23-08-2020, 05:57 PM
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codemonkey (Lee)
Lee "Wormsy" Borsboom

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Super cool Suavi, great to see you leveraging your darker skies and getting some broadband data! I love the little background fuzzies that Colin pointed out too.
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Old 24-08-2020, 08:57 AM
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gregbradley
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A wonderful image Suavi.
CFF scopes rock!

You got the outer halo which is not often shown.
Your colour looks quite accurate to me.

Greg
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Old 24-08-2020, 10:25 AM
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DavidTrap (David)
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Impressive - lot of detail there, regardless of the size of your scope.

I had issues with PI colour calibration on a few recent images. It's previously been good. I don't do enough processing to give a considered opinion though...

DT
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  #7  
Old 24-08-2020, 10:38 AM
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strongmanmike (Michael)
Woohoo it's clear

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Bright, colourful and deep, looks great Suavi.....while just a few short years ago it was non existent in images of this galaxy, now an image of this regularly hit big bright galaxy, is not truuuuly excellent, unless it shows that faint outer halo

Mike
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Old 24-08-2020, 11:15 AM
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John K
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Wow that's a great image!

John K.
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Old 24-08-2020, 11:22 AM
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Nice I image from that guidescope. Mine is a mini-guidescope
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  #10  
Old 24-08-2020, 03:49 PM
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Slawomir (Suavi)
Going visual

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Quote:
Originally Posted by PaulSthcoast View Post
Suavi,

That is an amazing image !

Thanks for sharing.

Paul.
Thank you Paul - much appreciate your kind feedback.

Quote:
Originally Posted by Atmos View Post
Fair number of galaxies in the field which you’ve done well to capture, exposure time definitely helps in that regard
Thank you Colin. Accumulated just a smidgen past 50 hours of 10-minute subs.

Quote:
Originally Posted by codemonkey View Post
Super cool Suavi, great to see you leveraging your darker skies and getting some broadband data! I love the little background fuzzies that Colin pointed out too.
Thank you Lee - I was hesitant to trying again galaxy with such small aperture, but as you wrote - I should start taking advantage of decently dark skies in our small town.

Quote:
Originally Posted by gregbradley View Post
A wonderful image Suavi.
CFF scopes rock!

You got the outer halo which is not often shown.
Your colour looks quite accurate to me.

Greg
Thank you Greg. I got the background noise down to 4 ADUs (st.dev.), it certainly helped in showing a few fainter aspects. Nearly happy with CCD's orthogonality - not an easy thing at f/4.5 with a short focal length.

Quote:
Originally Posted by DavidTrap View Post
Impressive - lot of detail there, regardless of the size of your scope.

I had issues with PI colour calibration on a few recent images. It's previously been good. I don't do enough processing to give a considered opinion though...

DT
Thank you David. With a few counted LRGB attempts I have made to date, I never got PI photometric colour calibration to give a reasonable colour balance. Maybe something to do with the amount of data?

Quote:
Originally Posted by strongmanmike View Post
Bright, colourful and deep, looks great Suavi.....while just a few short years ago it was non existent in images of this galaxy, now an image of this regularly hit big bright galaxy, is not truuuuly excellent, unless it shows that faint outer halo

Mike
Thank you Mike - trying to follow footsteps of great galaxy imagers like yourself

Quote:
Originally Posted by John K View Post
Wow that's a great image!

John K.
Thank you John - glad you like my attempt.

Quote:
Originally Posted by LewisM View Post
Nice I image from that guidescope. Mine is a mini-guidescope
Thank you Lewis. Your guidescope produces top notch data
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  #11  
Old 25-08-2020, 10:00 AM
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multiweb (Marc)
ze frogginator

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Very nice field.
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Old 26-08-2020, 12:22 PM
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vlazg (George)
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Excellent rendition Suavi, great result for a reasonably “small “ aperture. 😎
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  #13  
Old 27-08-2020, 05:25 PM
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Slawomir (Suavi)
Going visual

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Thank you Marc and George for your encouragement
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Old 29-08-2020, 07:30 AM
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The galaxy looks really nice Suavi. Not sure about the stars though. Something funky going on with them. However the star of the show is the galaxy for sure.
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Old 29-08-2020, 08:30 AM
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Slawomir (Suavi)
Going visual

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Thank you Paul. I agree that stars are a bit funky - having a bit of a trouble taming my Riccardi reducer. But imaging at f/4.5 with a refractor allows me to go quite deep within reasonable time, so I will stick with it for the time being.
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Old 29-08-2020, 08:49 AM
glend (Glen)
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I like it Suavi. A little fuzzy but the colour seems fine to me.
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  #17  
Old 29-08-2020, 03:22 PM
Placidus (Mike and Trish)
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All the good things the others have said, plus: Lots and lots of very distant galaxies that are out of field in a larger aperture.

There is "something" about 85 or 90% of the way to the bottom left corner which could just possibly be a cluster of very distant galaxies.

We like the star colours too.
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Old 30-08-2020, 06:14 PM
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Slawomir (Suavi)
Going visual

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Quote:
Originally Posted by glend View Post
I like it Suavi. A little fuzzy but the colour seems fine to me.
Glad you like it Glen.

Quote:
Originally Posted by Placidus View Post
All the good things the others have said, plus: Lots and lots of very distant galaxies that are out of field in a larger aperture.

There is "something" about 85 or 90% of the way to the bottom left corner which could just possibly be a cluster of very distant galaxies.

We like the star colours too.
Thank you Mike and Trish. I have noticed that potential cluster too - I am starting to get a taste for LRGB imaging, as the horizon extends so much much further than in narrowband!
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Old 30-08-2020, 06:18 PM
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LewisM
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ey Suavi, when you sell that guidescope, give a cooee
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  #20  
Old 31-08-2020, 12:48 PM
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Ryderscope (Rodney)
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A great show of this fine object Suavi.
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