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NGC 4945 - galaxy

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#1 jsmoraes

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Posted 19 July 2018 - 09:43 AM

Newtonian reflector telescope 305 mm - CMOS mono camera - LRGB filters - Coma corrector
4 x 15 x 2 min - LRGB

 

note: half Moon... nevertheless ... high brightness

 

n4945-wide.jpg

 

n4945-detail-1kA.jpg


  • KidOrion, eros312, elmiko and 4 others like this

#2 jsmoraes

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Posted 21 August 2018 - 11:02 AM

Galaxy without Milk Way's stars

 

n4945-nostars-170718-.jpg



#3 bill w

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Posted 22 August 2018 - 03:01 PM

cool galaxy

why is it so red?



#4 jsmoraes

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Posted 22 August 2018 - 03:28 PM

Always it cames to me redish. I saw at ESO and Hubble that red is a general color of this galaxy. Perhaps because of the dust clouds around it.

No artificial color was applied. I only tried to enhance the data I received from camera. As it was one of the first images done with cmos mono camera, maybe I have done wrong processing: too much red. You can see on wide field (first image) that I had problem with gradients in the background. Blue at right top. I can have done errouneous correction also.

 

You can see morre photos that I did at http://jsmastronomy....014-td1121.html  and http://jsmastronomy....945-td1153.html


Edited by jsmoraes, 22 August 2018 - 03:33 PM.


#5 bill w

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Posted 22 August 2018 - 10:43 PM

might check monitor calibration, looks much more red than ESO or hubble versions to me

also a lot of background red in some of your other images, e.g., centaurus A

great detail there too



#6 jsmoraes

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Posted 23 August 2018 - 07:48 AM

I saw different colors between my smartphone and my computer. With smartphone I have too much red.
I did Windows procedure to verify my monitor calibration, and it says it is ok.
I worked on my graphic hardware intel adjust and created a perfil the match the colors on my smartphone. For me, the general colors on my monitor are weird. Too much yellow.
I will do two different process when I do another photo. With original perfil and with the new smartphone perfil. i will publish the two versions and I will ask here what process has better color. Since in both notebook that I have here I don't see that intensity of red.

Edited by jsmoraes, 23 August 2018 - 12:26 PM.


#7 jsmoraes

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Posted 23 August 2018 - 08:24 AM

I did another perfil using Calibrite application, also. It has a better yellow. So, I will do 3 different process and publish them.

note: I did a reduction of saturation and replaced the originals files.

Have you any link to monitor calibration tool ? I want check what I did with another goog tool

Edited by jsmoraes, 23 August 2018 - 12:33 PM.



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