Jupiter 5th July

[asimov]

Seeing was pretty well identical to last night (yuck) so this time I dropped back on the image scale; 2X barlow & 1 extension tube. A better result I think.

C9.25/900nc

[Lester]

You are very quick tonight, Quick draw Mcgraw, er....Asi,

Good one mate, Can I stick on or two of my crap seeing ones from tonight on here?

[asimov]

Sure thing Lester.

Heres another one from a bit later (once I got the damn dew off the corrector)...

[Lester]

Yeah that helps.

At least you didn't get the onions. Don't worry I remembered them.

[asimov]

Oh....Did I forget to stipulate that if your images were better than mine, the answer was no......?

get them rotten meade images outa my celestron thread!!! :mad2: AAAHHH!!:mad2:

:rofl: :rofl:

Wow mate ! there really nice! That first one is a rippa :eyepop: Well done! :thumbsup: :thumbsup: :thumbsup:

[asimov]

Aperture rulezzz!

[Lester]

Thanks mate, the second one is a bit of a dudd. The conditions were not quite good enough for the extention tube.

This deconvolution stuff is prity easy.:whistle:

[Lester]

Meade Rules!:D

[asimov]

:doh:

[Rigel003]

You've both done a great job in pretty poor seeing. I had a go last night when Io was transiting but didn't end up with anything worth keeping. Well done.

Graeme

[iceman]

Great job both! I like asi's 3rd one and Lester's first. Although the colour in yours Lester is a bit too green for my liking.

Lester here's yours again with a few quick tweaks in Photoshop. (levels, colour balance and saturation).

[Lester]

Thanks Graeme and Mike,

for your responses. Mike I like your processing skill, and agree once I saw mine next to your image, that the colour difference stood out. You have also bourght out more detail. Thanks again.

[[1ponders]]

Aperture rules! But image scale really impresses :P

Yeah I know it looks like the cut end of a sushi roll, but it is big :D

This was taken right at the tad end of the imaging session loooong after I should have given up, shooting about 20 deg above the roof of the house, (I guess the house isn't as thermall insulated as I though :lol:)

Positive eyepiece projection on the 8" meade sct using a 15mm celestron Ultima eyepiece, FL approx 14.6 m, F/73, 300/1200 stack. I guess if I hand sorted I'd find some decent ones but at 00:30 who cares :P :)

480X480 pixel crop, using Virtual dub and the fantastic PCFE to covert to bmps and center and crop.

Feel free to chuckle at the quality, but mines the biggest :lol:

Oh and I had to use a hell of a lot of gain at 1/25 sec which is why it's so grainy

[Lester]

Hi Paul,

Top points for the BIGGEST. And an extra half of a point for no onion rings. Now I know how to kill onion= big fuzzy image.:rofl: :thumbsup:

[[1ponders]]

Works for me :D

[asimov]

If that was taken after you should have given up, I wanna see the ones taken before Paul....Show us ya details man!:D

F/73 !? Thats insane! :screwy: :rofl: :thumbsup:

[[1ponders]]

They are going through Virtual Dub as we speak, though I'm not holding out much hope for them. Don't know if you saw the jet stream over SEQld last night :sad:

[ving]

er.. question paul, why EP projection? it seems to make way blurry images... why not just throw the toucam straight in the focuser like everyone else? :confused:

great images everyone :)

[[1ponders]]

I was just being silly with trying to see how big an image I can get with a give setup.

Normally I would use a 2X barlow (negative projection) to get a bigger image than just using a toUcam straight in the focuser (prime focus). To get an even bigger image Mike, Dave Asi et al use an extension tube after their powermates/barlows (still negative projection). My barlow is pretty achromatic and the dreaded blue rim becomes very objectionable. By using an eyepiece to positive project (hopefully less chromatic aberation) and then extending the ToUcam back from the eyepiece I can get rediculously long focal lengths and image scale if I want. The reason my image is so fuzzy is because I exceeded the limit of resolution for my scope and I was imaging through very turbulent air coming off the roof of my house. I can actually vary the distance the ToUcam chip is from the eyepiece to vary my image scale to make the most of what the seeing will allow on any given night. I can also adjust it by varying the eyepiece fl as well. If I really wanted to by using say a 4 mm eyepiece I could probably get the GRS to fill the field of view but you probably wouldn't be able to recognise it.

For example, if I use a 32mm eyepiece I can reduce my scope focal length from 2000mm down to 500mm and reduce the f/ratio from f/10 to f/2.5. Now if I switch to a 4mm eyepiece :scared: and extend out to the max that my extender will allow I will get a FL of 60.5 meters and an f/ratio of about f/303. Pretty useless but I can get any ratiation inbetween to suit the conditions of the night, and using a good eyepiece have very little CA.

I'll post some images later once I've done the processing so you can see the difference in sizes using the different techniques.

[ving]

... so muckin around huh!
such a joker.
thanks for the explanation :)

[asimov]

Yeah, it's good fun trying to get Jupiter filling the screen & beyond!:lol:

I'd love to see the GRS filling the screen just for the hell of it! :D :rofl:

[[1ponders]]

I'll see what I can do for you ;)