Saturn 03/02/13 - FSQ106

[SpaceNoob (Chris)]

Some more messing around with the FSQ106 on planets; while I wait to get the newtonian up and running.

This was a little harder than Jupiter, small aperture really hurting my ability to get some decent FPS capture without having to push the gain too far.

FSQ106EDXIII, 5x, ASI120MM - LRGB, 90 seconds per channel @ ~ 20 FPS (not enough light to push higher).

Stacked using AVIStack2, Combined with AstraImage3, and colour balance done via PS-CS6.

Still learning but good practice before the step up in aperture

[Quark (Trevor)]

Good job Chris, coming along nicely. Improvement in this game comes from imaging as often as possible and honing your processing skills with a bit of experimentation to see what works and what doesn't, for your particular imaging system. Due to the displacement of the G & B channels over the time period of your capture the Preceding edge of the rings has a red fringe while the Following limb has a blue fringe. When you merge your channels in AI you should deal with this by shifting the G channel (probably 1 pixel toward the F side) and shift the B channel (probably 2 pixels toward the F side), The object being to do away with the colour fringe. It also helps to zoom your image up to 300% while in the merge channels screen, this makes it easier, when aligning the channels, to get the alignment spot on in both X & Y axis.

Regards
Trevor

[asimov (John)]

Nice work Chris!

[SpaceNoob (Chris)]

Originally Posted by Quark

Good job Chris, coming along nicely. Improvement in this game comes from imaging as often as possible and honing your processing skills with a bit of experimentation to see what works and what doesn't, for your particular imaging system. Due to the displacement of the G & B channels over the time period of your capture the Preceding edge of the rings has a red fringe while the Following limb has a blue fringe. When you merge your channels in AI you should deal with this by shifting the G channel (probably 1 pixel toward the F side) and shift the B channel (probably 2 pixels toward the F side), The object being to do away with the colour fringe. It also helps to zoom your image up to 300% while in the merge channels screen, this makes it easier, when aligning the channels, to get the alignment spot on in both X & Y axis.

Regards
Trevor

Cheers for the feedback Trevor, much appreciated, I'll try sort out this alignment thing

I didn't know there was a zoom function in AI when doing the LRGB combine, unless I'm using the wrong version? The combine feature seems very limited from a control perspective in the version that I am using.

[Quark (Trevor)]

Originally Posted by SpaceNoob

Cheers for the feedback Trevor, much appreciated, I'll try sort out this alignment thing

I didn't know there was a zoom function in AI when doing the LRGB combine, unless I'm using the wrong version? The combine feature seems very limited from a control perspective in the version that I am using.

Hi Chris,

There is quite a lot that can be done from the merge channels screen in Astra Image. Have attached a screen shot of the merge channels screen with the image zoomed 400%.

Regards
Trevor

[Frewi808 (Freddy)]

Sorry to jump in here, but indeed after combining the RGB channels in Astra Image or in Registax or other software I always do check the RGB alignment with Fitswork, if the RGB channels are off a bit this program will correct it, I also check it when using WInjupos RGB(IR) channels combine, just to make sure, you never know... I hope this was some 'help' here..
Freddy

[SpaceNoob (Chris)]

Big help, thanks heaps guys. Much appreciated!

[Shiraz (Ray)]

nice work Chris - looking forward to you getting the bigger scope running.

it is sometimes difficult to get rid of all colour fringes, since the stacking can sometimes distort the planet shape in the colour channels differently in ordinary seeing. have found that AS!2 does the best job if you have this problem. regards ray