Search found 35326 matches

by marktownley
Wed Jun 29, 2022 9:41 pm
Forum: This is SolarChat !!
Topic: June 28 AR3040 and Granulation
Replies: 2
Views: 48

Re: June 28 AR3040 and Granulation

Nice capture Jordan!
by marktownley
Wed Jun 29, 2022 7:27 pm
Forum: Solar Software
Topic: Software for understanding the design of solar telescopes
Replies: 3
Views: 64

Re: Software for understanding the design of solar telescopes

Thanks George! Does the software graph those tables? I go number blind with those blocks of data.
by marktownley
Wed Jun 29, 2022 5:47 am
Forum: This is SolarChat !!
Topic: Sun FD in H-Alpha, CaK and Continuum 28th of June 2022
Replies: 15
Views: 133

Re: Sun FD in H-Alpha, CaK and Continuum 28th of June 2022

I am aware of critical sampling (courtesy of Malveaux) and try to adhere to it. I assume though that this could be dealt with a barlow / telecentric to reach the desired focal ratio, but it would increase the focal length of the system and reduce FOV to an unacceptable size. It could, but the disk ...
by marktownley
Wed Jun 29, 2022 5:25 am
Forum: This is SolarChat !!
Topic: Sun FD in H-Alpha, CaK and Continuum 28th of June 2022
Replies: 15
Views: 133

Re: Sun FD in H-Alpha, CaK and Continuum 28th of June 2022

1. You stop down your scope. Why do that and reduce resolution? It is for critical sampling. If not would be under sampling, which might offer an decrease in exposure time but offers no increase in resolution from optimal sampling. Think of optimal sampling as sitting reading a news paper or magazi...
by marktownley
Wed Jun 29, 2022 5:14 am
Forum: Solar Scope Modifications
Topic: Truss tube ideas
Replies: 24
Views: 676

Re: Truss tube ideas

More cool scopes! Nice instrument Chris!
by marktownley
Wed Jun 29, 2022 5:13 am
Forum: Commercial Solar Filters/Cameras/Hardware
Topic: Collimating a long image train
Replies: 3
Views: 83

Re: Collimating a long image train

What's the focuser like on the scope?
by marktownley
Tue Jun 28, 2022 8:15 pm
Forum: Sunlit Earth
Topic: Some interesting clouds...start of monsoon
Replies: 3
Views: 55

Re: Some interesting clouds...start of monsoon

They look impressive Kevin!
by marktownley
Tue Jun 28, 2022 8:12 pm
Forum: This is SolarChat !!
Topic: Sun FD in H-Alpha, CaK and Continuum 28th of June 2022
Replies: 15
Views: 133

Re: Sun FD in H-Alpha, CaK and Continuum 28th of June 2022

Cool and grey here today, so nice to see what was going on. The sun looks quieter again now.
by marktownley
Tue Jun 28, 2022 8:05 pm
Forum: Solar Radio, Magnetometry and Spectroscopy
Topic: 23June2022: The Fraunhofer Four
Replies: 6
Views: 100

Re: 23June2022: The Fraunhofer Four

Always nice to see your work Peter!
by marktownley
Tue Jun 28, 2022 7:56 pm
Forum: Solar Scope Modifications
Topic: Truss tube ideas
Replies: 24
Views: 676

Re: Truss tube ideas

That's pretty cool Paul!
by marktownley
Tue Jun 28, 2022 7:51 pm
Forum: This is SolarChat !!
Topic: June 28 2022 Imaging. First time using " new " equipment.
Replies: 29
Views: 234

Re: June 28 2022 Imaging. First time using " new " equipment.

These are nice results James! Considering this is with an alt az mount it is even better. Cloudy for me today so good to see what is going on.
by marktownley
Tue Jun 28, 2022 7:35 pm
Forum: This is SolarChat !!
Topic: Sol del 25 de junio del 2022.
Replies: 5
Views: 94

Re: Sol del 25 de junio del 2022.

Nice to see your images Eric, cloudy all day here!
by marktownley
Tue Jun 28, 2022 7:18 pm
Forum: This is SolarChat !!
Topic: 28.06.2022 AR3040
Replies: 8
Views: 102

Re: 28.06.2022 AR3040

Nice shots Chris!
by marktownley
Tue Jun 28, 2022 5:31 am
Forum: This is SolarChat !!
Topic: June 27 2022 Observations. WL through thin clouds.
Replies: 7
Views: 101

Re: June 27 2022 Observations. WL through thin clouds.

DeepSolar64 wrote: Tue Jun 28, 2022 4:47 am You are welcome Mark. May the cats get you up to an early sunny start.
Nar, in the week they stay in bed when I have to get up for work. They've both gone back to bed now after their breakfast.
by marktownley
Tue Jun 28, 2022 5:29 am
Forum: This is SolarChat !!
Topic: Worthy upgrade from a Flea?
Replies: 3
Views: 120

Re: Worthy upgrade from a Flea?

Hi Stefan.

A zwo 178mm will be a good match for the scope.

Mark
by marktownley
Tue Jun 28, 2022 5:22 am
Forum: This is SolarChat !!
Topic: Animations from 6/27/2022
Replies: 8
Views: 97

Re: Animations from 6/27/2022

Always love your cinema Warren!
by marktownley
Tue Jun 28, 2022 5:21 am
Forum: SPoD Archive
Topic: June 27 2022 AR3040 and prom Ha
Replies: 5
Views: 27

Re: June 27 2022 AR3040 and prom Ha

They still look good Leo! Viewing them less than full size in the forum thread compensates for any apparent oversampling.
by marktownley
Tue Jun 28, 2022 5:21 am
Forum: This is SolarChat !!
Topic: June 27 2022 AR3040 and prom Ha
Replies: 14
Views: 191

Re: June 27 2022 AR3040 and prom Ha

They still look good Leo! Viewing them less than full size in the forum thread compensates for any apparent oversampling.
by marktownley
Mon Jun 27, 2022 8:03 pm
Forum: This is SolarChat !!
Topic: Today's SUN (20220627) | GOOD seeing (video added)
Replies: 16
Views: 203

Re: Today's SUN (20220627) | GOOD seeing

A super set of images Pedro!
by marktownley
Mon Jun 27, 2022 7:51 pm
Forum: This is SolarChat !!
Topic: June 27 2022 Observations. WL through thin clouds.
Replies: 7
Views: 101

Re: June 27 2022 Observations. WL through thin clouds.

Thanks JAmes, didn't finish work till really late tonight so no sun for me today, nice to read your report though. I may get an early morning shot if i'm lucky before work.
by marktownley
Mon Jun 27, 2022 7:47 pm
Forum: This is SolarChat !!
Topic: Learmonth B-Class 26/06/2022
Replies: 2
Views: 64

Re: Learmonth B-Class 26/06/2022

Thanks Andrew, no sun for me today,
by marktownley
Mon Jun 27, 2022 7:46 pm
Forum: This is SolarChat !!
Topic: Sunday Sunshine - Seeing and Sampling June 26th
Replies: 20
Views: 249

Re: Sunday Sunshine - Seeing and Sampling June 26th

Hi Mark, A scientific approach wins the day. This is a really nice demonstration of the balance to be struck between some important factors determining the ability to resolve detail. My approach is to try to set up each of my scope/Barlow/camera (pixel size) combinations to operate under ‘critical ...
by marktownley
Mon Jun 27, 2022 5:22 am
Forum: This is SolarChat !!
Topic: Sunday Sunshine - Seeing and Sampling June 26th
Replies: 20
Views: 249

Re: Sunday Sunshine - Seeing and Sampling June 26th

Thanks guys, cloud and rain here this monday morning.
by marktownley
Mon Jun 27, 2022 5:21 am
Forum: This is SolarChat !!
Topic: June 25th Ha Session
Replies: 9
Views: 121

Re: June 25th Ha Session

These came out really well Brian, I know the feeling of work imposing constraints, sometime you just gotta image regardless of what the seeing might be like!