I think the idea of midday so the light is at its brightest and most white. Later in the afternoon or morning light is not quite white and can be a bit reddish/pinkish depending on the time of course.
The least amount of atmosphere,pollution the light has to go through would be at midday.
Yep, that looks closer to the mark.
I think a bit more blue should be present in Eta. It has a bluish tinge in parts of it.
Greg.
Quote:
Originally Posted by h0ughy
thanks for the constructive input Greg - well and truely taken on board. here is a repro i have done from scratch. its not perfect but it has improved the colour a tad
I think the idea of midday so the light is at its brightest and most white. Later in the afternoon or morning light is not quite white and can be a bit reddish/pinkish depending on the time of course.
The least amount of atmosphere,pollution the light has to go through would be at midday.
Greg.
David, this is an old post but it might get you started.
I think the idea of midday so the light is at its brightest and most white. Later in the afternoon or morning light is not quite white and can be a bit reddish/pinkish depending on the time of course.
The least amount of atmosphere,pollution the light has to go through would be at midday.
Here is one of my better Eta images using an AP140 and Apogee U16M. Not saying this is perfect
but it is one of the better ones I have taken. More close up images tend to look a bit more bluish around
that bubble type central nebula region. The Ha is a bit more dominant in this image and so everything is
quite red.
Star colours seem fairly accurate so I assume the neb is close as well.
This is also a HaLRGB image so it will be more red than yours for that reason.
Here is one of my better Eta images using an AP140 and Apogee U16M. Not saying this is perfect
but it is one of the better ones I have taken. More close up images tend to look a bit more bluish around
that bubble type central nebula region. The Ha is a bit more dominant in this image and so everything is
quite red.
Star colours seem fairly accurate so I assume the neb is close as well.
This is also a HaLRGB image so it will be more red than yours for that reason.
Looks good but just to throw a spanner in the works ...I think it is blue that it now needs - just a tad. I find that a red cast in the sky spaces is often mistaken for nebulosity when processing the Eta complex, try just dropping the red background by uping the blue and green a touch....or leave it the hell alone is another option
Looks good but just to throw a spanner in the works ...I think it is blue that it now needs - just a tad. I find that a red cast in the sky spaces is often mistaken for nebulosity when processing the Eta complex, try just dropping the red background by uping the blue and green a touch....or leave it the hell alone is another option
I agree with Mike here. Gotta be careful here because mine had a lot of Ha subexposures added, hence the heavy red nebula. LRGB wouldn't usually look like that and as Mike says a touch more blue, green and pull the red back.
Colour balance is hard eh?
Are you looking at the histograms for all colour channels? It may show the red as being different to the others. You want to try to get them to start at the same spot and that may entail pulling one back or enhancing another.
Another thing to try (god forgive me for suggesting this) is to use "auto colour" in Photoshop. I find it tends to make images too green
(at least PS CS2, I think it improved with later versions). But sometimes it gets it close and a slight tweak and you are there.
Do you have a link to a larger file version of it?
I agree with Mike here. Gotta be careful here because mine had a lot of Ha subexposures added, hence the heavy red nebula. LRGB wouldn't usually look like that and as Mike says a touch more blue, green and pull the red back.
Colour balance is hard eh?
Are you looking at the histograms for all colour channels? It may show the red as being different to the others. You want to try to get them to start at the same spot and that may entail pulling one back or enhancing another.
Another thing to try (god forgive me for suggesting this) is to use "auto colour" in Photoshop. I find it tends to make images too green
(at least PS CS2, I think it improved with later versions). But sometimes it gets it close and a slight tweak and you are there. - yes Mike i turned it back around
Do you have a link to a larger file version of it?
Greg.
i dropped over to see Dr Sidonio Physician for the pixellated and he said to take 2 RGB's and have a lie down, this is a very quick and nasty Sidonio but he was showing me some finer points - you could hear the rubber glove snap to the hand when he was showing me. Cough with a bit mor massageing and attention to detail, and some re-education i think i might just get there.
i will ftp it and provide the fits and the jpeg - Astroart does not read the 64bit fits as i found out so i will save it as 32bit
hey im sorry i experimented - badly i think i will go away and practice a lot - as i said Mike, photoshop is not my strong point, think i will remove the post
hey im sorry i experimented - badly i think i will go away and practice a lot - as i said Mike photoshop is not my strong point, think i will remone the post
It wasn't bad...I just accidentally fainted, sorry......now where was I?..hey where's the image..?...WHERE'S THE IMAGE??.....WHERE'S THE IMAGE???? I WANT THE IMAGE
It wasn't bad...I just accidentally fainted, sorry......now where was I?..hey where's the image..?...WHERE'S THE IMAGE??.....WHERE'S THE IMAGE???? I WANT THE IMAGE
willtry the 18%
here is a repro i have done from scratch. its not perfect but it has improved the colour a tad
...I think it is blue that it now needs 
- just a tad. I find that a red cast in the sky spaces is often mistaken for nebulosity when processing the Eta complex, try just dropping the red background by uping the blue and green a touch....or leave it the hell alone is another option 
with a bit mor massageing and attention to detail, and some re-education i think i might just get there.
i think i will go away and practice a lot - as i said Mike, photoshop is not my strong point, think i will remove the post
I WANT THE IMAGE 
