Ok, every time i go out there, i am getting better at the basics.
Temperature control:
With the ice packs that come straight out of the freezer and with the two sensors, i can control the difference between mirror and ambient. Last night at most times, the maximum difference was less than .5 degrees
Collimation:
The best it has ever been. The motorized dob means i can keep that star right in the centre of the field of view and then defocus. It is very pleasing to watch that circular pattern stay circular as it goes to a point when focussing.
Focussing:
Hartmann mask and also the moon were around so that using the 5x powermate and the toucam, i can get a good focus, lock the focusser adn then swing to the planet.
Given all this, the jetstream was apparently between 80 and 110 mph, and there was still a twinkle of the stars. The end result is that my jupiter and saturn did not produce the goods. I shot @ 10fps for saturn @ 640 x 480 and for jupiter, i had to go back to 320x240 and boost up the frame rate to 15fps to get enough frames to play with. Saturn was done at 75% gain and jupiter at 1/25 and 100% as that damn fog came in again as i was doing my final alignments of the guidescope.
The moral of the story is that i am always improving these basic techniques so that when that special 2 or 3 times a year perfect night, i am ready!!
Hi DP, you're certainly putting a lot into this DP and when the seeing comes you way you'll have in all down to perfection. Your Jupiter here shows heaps of detail already - like the sepia tone too
Yes practice, practice and more practice is the key to good planetary imaging. Your only as good as your last image or so it seems. Your right about 2 or 3 times a year that the seeing is special, although I think you have had more than that Davo. I am hoping that Snake valley will produce some good seeing in the coming weeks. We will need some seeing reports from Ken I think.
