Saturn 15th January - from Tassie

[davidpretorius]

More of a muck around, the temps are falling, the mirror can't keep up, so i had icepacks on the base, which i am sure buggered the collimation.

The main thing is that thanks to Iceman, i have found out to alter the peach colout of saturn when you shoot in colour raw mode.

The seeing was good, but a 4 degree temp difference

70 frames only for what ended up being my best cassini division and 200 odd frames for the other.

Mostly a muck around, but at least I have learnt something new and that is always good

[iceman]

What did I do?

I love the first one, looks really really good. nicely processed, just a little grainy due to the small number of frames.

[davidpretorius]

you told me about the colour channels under histogram and how you tweak them a few weeks ago.

thanks mate!!!

[ving]

so more frames = less grain? have to keep that in mind :)

nice shots dave :)

[iceman]

Yes Ving, it increases the signal to noise ratio. (noise = grain. Less noise = less grain)

DP - ah that, cool. The colours look great on yours.

[bird]

Nice image!

Bird

[Robert_T]

So DP how exactly are you and Mike tweaking the colour channels - are you simply downgrading the red under histogram in registax?

Nice saturns too!

[davidpretorius]

mike tweaks with skill but to be honest, i clicked on the histogram and then pressed auto something and then it turned really blue. i pulled the blue back and the colour started looking normal.

i am shocking when it comes to anything outside of r,g,b. i have no idea what colour mixes make what?

Maybe for yours and asi browner shades for saturn, the histogram page with these colour sliders may be an option????

[cjmarsh81]

I love the first picture. Great cassini division.

What approximate magnification would you have used for this pic? Just curious how powerful you can go.

[davidpretorius]

at least 1040x

[cjmarsh81]

Wow. I have trouble viewing at 480x.

[davidpretorius]

imaging:
i can get away with magnification as when the conditions are not superb ie the image is in and out of focus, if i shoot 1000 frames, then maybe 100 will be ok. i can then work on those 100

viewing:
the above scenario, my eyes would hate trying to work it out, for us to see detail at 1000x, then we would need the planet to stay still for most of the time.

a big difference!!!

last night was out of the box! i viewed at 250x ie your 5mm vixen, 500x and 1000x.

normally 250x i can view most of the time, 500x: <10 % of time, 1000x: <1% of the time.

[cjmarsh81]

Ok, I don't feel so bad now. I can manage 240x most of the time and so far 480x is only good for the moon.

[asimov]

Nice saturns mate!

[[1ponders]]

Nice shot's Dave. That first one looks like it's just hanging there......waiting to snap into crispness. A few more frames would have been great.

Just out of curiosity did you do a RGB shift at all? There looks like a slight misalignment along the lower edge of the rings.