Search found 86 matches

by Dunmunro
02 Jan 2020, 19:47
Forum: Instrumentation
Topic: ASCOM temperature sensor?
Replies: 2
Views: 648

ASCOM temperature sensor?

Hi all. I want to add a temperature sensor to monitor the temperature of my SCT tube, and then use that temperature to focus via the coefficient of expansion of the tube. Does any know of a suitable ASCOM supported sensor?
by Dunmunro
22 Dec 2019, 05:52
Forum: Instrumentation
Topic: FF Autofocus
Replies: 1
Views: 515

FF Autofocus

After some trial and error, FF autofocus seems to work well. I find that I have to use longer exposures, than with the single star autofocus to get consistent results and the rule of thumb seems to be about twice the integration time as with single star, but 2 exposures per increment. So if single s...
by Dunmunro
20 Dec 2019, 11:32
Forum: Images, research, events
Topic: NGC891
Replies: 0
Views: 1422

NGC891

NGC891 with all phases of image acquisition, including guiding, handled by Astroart 7: https://www.cloudynights.com/uploads/gallery/album_10884/gallery_93598_10884_116411.jpg https://www.cloudynights.com/gallery/image/86596-n891dec18-20-45x360ff-df-cropmex15/ 45 x 360sec images, with full frame auto...
by Dunmunro
19 Dec 2019, 05:50
Forum: Instrumentation
Topic: Full frame auto-focus bug
Replies: 3
Views: 683

Re: Full frame auto-focus bug

OK, I used 99999 as per the documentation...and FF AF is now working extremely well.

more later.

Duncan
by Dunmunro
18 Dec 2019, 20:10
Forum: Instrumentation
Topic: Full frame auto-focus bug
Replies: 3
Views: 683

Re: Full frame auto-focus bug

Hi, did you set the special position 99999 to launch autofocus in the Sequencer? Mea Culpa.... I was putting in a 1 for 1 iteration of the FF autofocus, which was my mistake. I'll try it again tonight. However, I did discover that if I tried to use a 50% subframe with FF autofocus that it would cre...
by Dunmunro
18 Dec 2019, 05:45
Forum: Instrumentation
Topic: Full frame auto-focus bug
Replies: 3
Views: 683

Full frame auto-focus bug

Hi. I've found a bug in the Sequencer FF Autofocus. Basically, it drives the focuser to the zero position when it starts, which typically drives it completely out of focus. Example: Focuser is perfectly focused at position 14725 prior to starting Sequencer. As soon as the Sequencer calls FF autofocu...
by Dunmunro
02 Dec 2019, 20:22
Forum: General
Topic: Astroart 7.0 SP2
Replies: 6
Views: 1442

Re: Astroart 7.0 SP2

Great, I assume that this is the first exposure of the night (?) If not, for autofocusing during the night, the Step must be lower, because the defocus must be much lower. I'd say maximum 50-100% of star size, for example, if the good focus for your system is stars of 4 pixels then the Step must be...
by Dunmunro
27 Nov 2019, 18:18
Forum: General
Topic: Astroart 7.0 SP2
Replies: 6
Views: 1442

Re: Astroart 7.0 SP2

Fabio, thanks!
by Dunmunro
10 Oct 2019, 16:01
Forum: Instrumentation
Topic: lodestar x2
Replies: 4
Views: 824

Re: lodestar x2

toharra wrote:
10 Oct 2019, 14:50
No, as I don't have that program.
There's a fully functional free demo available here:

http://www.msb-astroart.com/

I don't use Maxim, so I can't really comment on that.
by Dunmunro
10 Oct 2019, 04:24
Forum: Instrumentation
Topic: lodestar x2
Replies: 4
Views: 824

Re: lodestar x2

I am using my newly purchased lodestar x2 with maxim dl version 4.2. I am able to focus easily but when I try to set up guiding, the error message "unable to detect guide star" keeps appearing. I have tried to use a very bright star i.e. Caph and still the same results. Any ideas. Best regards, Tom...