Search found 13 matches

by brujo
27 Jan 2021, 06:05
Forum: Instrumentation
Topic: Dither problem.
Replies: 4
Views: 187

Re: Dither problem.

Yes, I am using a Celestron 11, but It can't be mirror shift.
I am dithering every 3-rd image , and every 3rd image shows this "double" star.
It looks like dithering is going on while taking images.
by brujo
27 Jan 2021, 01:12
Forum: Instrumentation
Topic: Dither problem.
Replies: 4
Views: 187

Dither problem.

I guide with AstroArt, but have a problem with dither.
Every image that was dithered is capturing while moving the mount.
Here is an example. Maximum shift on x and y is 2 pixels.
by brujo
04 Nov 2020, 15:04
Forum: Instrumentation
Topic: Problem with sequence
Replies: 4
Views: 261

Re: Problem with sequence

Yes, this was just an indoor test for demonstration. But I have noticed this while capturing at night on a real target. While taking L,R,G,B frames I noticed that the first image of every color was more like the last of the previous color. Anyway, no problem, will use a dummy image. It is probably a...
by brujo
04 Nov 2020, 10:46
Forum: Instrumentation
Topic: Problem with sequence
Replies: 4
Views: 261

Re: Problem with sequence

It is all ASCOM.
It has to be a residual charge, because the filter wheel is fast enough.
Have inserted a dummy image of 1 second between LIGHT and DARK and everything is OK.
Is there some other way to "discharge" the sensor ?
by brujo
03 Nov 2020, 17:43
Forum: Instrumentation
Topic: Problem with sequence
Replies: 4
Views: 261

Problem with sequence

I am using Zwo mini filter wheel and QHY174MM cooled camera on AstroArt 7 SP4.
When running sequence, there is a problem with the first image of the next sequence.
As you can see in the image, the first dark image was taken while the filter wheel was still turning.
by brujo
13 Apr 2020, 18:18
Forum: Instrumentation
Topic: Focusing problem with SP3
Replies: 3
Views: 1076

Re: Focusing problem with SP3

Hello.

You were right.
I've tried again and it din't worked also on SP2.
Have reinstalled SP3, restarted and now it works.

Regards
Igor
by brujo
12 Apr 2020, 17:23
Forum: Instrumentation
Topic: Focusing problem with SP3
Replies: 3
Views: 1076

Focusing problem with SP3

Hello.

I've noticed (probably) a bug in SP3.
Using the Pegaus Astro focuser with ASCOM and can't focus anymore.
Focuser just goes the opposite way as it should, even setting reverse.

With SP2 everything works OK.
by brujo
22 Aug 2019, 07:37
Forum: Image processing and analysis
Topic: Lucky Imaging problem
Replies: 2
Views: 756

Re: Lucky Imaging problem

You are right!
After selecting sigma it looks much better.

Thanks.
by brujo
21 Aug 2019, 20:44
Forum: Image processing and analysis
Topic: Lucky Imaging problem
Replies: 2
Views: 756

Lucky Imaging problem

I have pre-processed a few hundred images with an exposure of 5 seconds. But when I stack them, the final image is very grained (left image). Doing the same with Deep Sky Stacker produces a much better result (right image). I use default settings in both programs. I wonder if there are any settings ...
by brujo
20 Jun 2019, 22:38
Forum: Image processing and analysis
Topic: RGB horizontal stripes
Replies: 6
Views: 1440

Re: RGB horizontal stripes

Have repeated once again.
Luminance without dither and Green with dither.
And the problem remains.
I'm confused..
After making a new set of green frames i see that the solution is to make a lot more coloured images than luminance.
2 hours of green images are looking better