Quote:
Originally Posted by kinetic
Hoff,
put the best AVI thru castrator and zip it and upload it to files.
That way we can see what it looked like for you live.
Did it look like these? This was average seeing, long cool down, cold night.
Potential image scale and detail are definitely promising though.
The Saturn for sure. Was it early evening (low) or later (higher in sky)?
Steve |
yeah saturn was low and mars is off in the north low
Quote:
Originally Posted by Shiraz
looks like poor seeing to me, but nothing embarrassing at all. Ease of focusing is a good indicator of seeing - if it is hard to focus, the image will be ordinary. As Andrew points out, the scope must also be in thermal equilibrium with the air or you will get boiling of the image from tube currents and boundary layers in addition to the seeing effects.
FWIW, I use the appearance of fine detail in the image (if there is any) to focus and just wait long enough at each setting to make sure I get a good sample of seeing to decide if it needs tweaking.
I suspect that everyone has hard disks full of useless images taken in poor seeing.
Regards Ray
|
i think it was seeing and the focus wasnt right
Quote:
Originally Posted by Poita
Your description of the planets dancing around is probably a combination of scope currents and poor seeing, that is how it is, but the Saturn image also looks like it could be processed better to get a more impressive result.
My own efforts from some very average seeing a few nights back sound exactly like you described, it was jumping around like a cork in a washing machine, and the avi looked awful:
http://www.iceinspace.com.au/forum/a...e.php?a=111043
But it processed into this: http://www.iceinspace.com.au/forum/a...e.php?a=111042
which is not great but far less awful than the .avi looked.
Try running the videos through Autostakkert just using the defaults and see what you get.
Or post the videos somewhere so we can have a go at processing.
The mars is overexposed by the look of it, and both images are suffering from colour balance being out when capturing.
Can you post a couple of the Saturn best frames from the .avi file, that way we can see what it should look like. |
the videos are too big to post even after shrinking and autostakkert didnt help - much of a learning curve for that programme as well
Quote:
Originally Posted by sheeny
Is the fan blowing across your OTA or just extracting air from the dome?
I use a 12" fan blowing across the OTA of the C11 because it takes forever to cool compaired to the C8. The fan needs a good 1 to 1.5 hrs to get rid of the tube currents in the airey disc (throw it out of focus and you'll see the tube currents as a vertical column or "trees" through the airey disc). Then you've just got normal cooling rates to worry about  .
I can also get rid of half my dome to help it cool too... prolly not so easy in a full dome.
Al. |
maybe an airconditioner - i saw one at homeart yesterday for500 dollars -maybe?