Blue channels

[asimov (John)]

I was going to show you this the other day Lester but forgot.

Heres some blue channel splits. Mine, Lesters and Daves.

Mine seems to be the tidiest, but why?? What does all this mean?

[iceman (Mike)]

The blue channel seems to be the one most affected by seeing and atmospheric dispertion.

Generally, I've found that if the blue channel is good, you'll get a great image. If the blue channel is really messy, the whole image will suffer as a result.

Why yours is better than Lesters and Dave's, I imagine it just comes down to the conditions on the night they were taken. You'd have to compare the blue channels from the same location in yours and Lesters scopes (on the same night) to see if there's anything else in it.

[asimov (John)]

Same conditions Mike, both Lesters & mine taken about 20 mins apart on the 23rd june. We live 18 k's apart.

[Lester]

Well Asi,

You should be blowing me out of the water then, and we should both be after looking at Dave's.

[asimov (John)]

Daves is spot on the money when you compare his red & green channels.

[Lester]

yea right.

[Robert_T]

[quote=iceman]The blue channel seems to be the one most affected by seeing and atmospheric dispertion.

Generally, I've found that if the blue channel is good, you'll get a great image. If the blue channel is really messy, the whole image will suffer as a result.quote]

On a related subject I remember reading a guy in the states I think that images just in Red and Green because his local seeing is so poor, and makes colour images from that (how I don't know). Hmmm... might be an advantage of a mono camera for poor seeing areas?

[StargazerX1]

[quote=Robert_T]

Originally Posted by iceman

The blue channel seems to be the one most affected by seeing and atmospheric dispertion.

Generally, I've found that if the blue channel is good, you'll get a great image. If the blue channel is really messy, the whole image will suffer as a result.quote]

On a related subject I remember reading a guy in the states I think that images just in Red and Green because his local seeing is so poor, and makes colour images from that (how I don't know). Hmmm... might be an advantage of a mono camera for poor seeing areas?

Robert,

I believe Alan Friedman has experimented successfully with using Red+Green as a luminance frame, but it still requires RGB for true color (LRGB = RG:RGB).

I have yet to get what I would call a 'good' blue frame with Jupiter this season, given its altitude from my site (< 43 deg at best). When the blue channel was fair the seeing was as good as it gets at those altitudes.

Glenn Jolly
Arizona USA

[StargazerX1]

Originally Posted by asimov

I was going to show you this the other day Lester but forgot.

Heres some blue channel splits. Mine, Lesters and Daves.

Mine seems to be the tidiest, but why?? What does all this mean?

Asi,

Looks like you are using optimized color mode and Lester is not? I know when I was still using the NexImage camera the optimized color mode was vastly superior to native, and seemed to me less noisy. Also it appears 'Daves' image is a single frame?

Glenn Jolly
Arizona USA

[davidpretorius]

I must try a few more of the better vids and see how the blue channel is. I am trying heaps more brightness and gain over the last few months, so would be interested in seeing that has affected the blue more than the others?

Good question asi!

[asimov (John)]

Hi Glenn. No, I don't use optimized colour.