Search found 35338 matches

by marktownley
Fri Jul 01, 2022 5:44 am
Forum: This is SolarChat !!
Topic: A couple of disks from June 30
Replies: 5
Views: 71

Re: A couple of disks from June 30

Lots of contrast there Lou!
by marktownley
Thu Jun 30, 2022 5:04 pm
Forum: SPoD Archive
Topic: 30th June FD
Replies: 9
Views: 12

Re: 30th June FD

Looking good there Robert! Heavy showers down here today.
by marktownley
Thu Jun 30, 2022 5:04 pm
Forum: This is SolarChat !!
Topic: 30th June FD
Replies: 10
Views: 115

Re: 30th June FD

Looking good there Robert! Heavy showers down here today.
by marktownley
Thu Jun 30, 2022 5:03 pm
Forum: This is SolarChat !!
Topic: Animation of AR3040 and 3042 6/29/2022
Replies: 11
Views: 104

Re: Animation of AR3040 and 3042 6/29/2022

Lovely cinema as always Warren!
by marktownley
Thu Jun 30, 2022 4:57 pm
Forum: This is SolarChat !!
Topic: Learmonth B-Class 29/06/2022
Replies: 2
Views: 64

Re: Learmonth B-Class 29/06/2022

Thanks Andrew!
by marktownley
Thu Jun 30, 2022 4:50 pm
Forum: Commercial Solar Filters/Cameras/Hardware
Topic: Which Herschel Wedge with C9.25?
Replies: 5
Views: 88

Re: Which Herschel Wedge with C9.25?

Hi, what kind of Herschel wedge would you recommend for imaging only use with my C9.25 (with D-ERF)? Is there a benefit of 2" versions like Baader or APM in comparison to 1.25" versions? I already have a 2" Lumicon OIII Filter that i want to use with the wedge, so i guess the 2"...
by marktownley
Thu Jun 30, 2022 5:29 am
Forum: Solar Radio, Magnetometry and Spectroscopy
Topic: 23May2022: UV Spectroheliograms
Replies: 3
Views: 72

Re: 23May2022: UV Spectroheliograms

They came out well Peter!
by marktownley
Thu Jun 30, 2022 5:28 am
Forum: Commercial Solar Filters/Cameras/Hardware
Topic: Collimating a long image train
Replies: 4
Views: 121

Re: Collimating a long image train

Does it need to be pointing at the sun to get the red reflection?
by marktownley
Thu Jun 30, 2022 5:26 am
Forum: This is SolarChat !!
Topic: June 29 2022 Observations
Replies: 6
Views: 102

Re: June 29 2022 Observations

You got a nice hour in there James, solar just hasn't been possible for me this week with work and weather both not aligning.
by marktownley
Thu Jun 30, 2022 5:24 am
Forum: This is SolarChat !!
Topic: Full disc 29-06-2022
Replies: 13
Views: 153

Re: Full disc 29-06-2022

Good results in the gaps Rainer, i've not had any gaps at all this week.
by marktownley
Thu Jun 30, 2022 5:24 am
Forum: This is SolarChat !!
Topic: Sun FD in H-Alpha, CaK and Continuum 29th of June 2022
Replies: 6
Views: 92

Re: Sun FD in H-Alpha, CaK and Continuum 29th of June 2022

Very nice Arne, it has been cloud, showers and rain here all week, so nice to see what is happening on the sun.
by marktownley
Thu Jun 30, 2022 5:22 am
Forum: This is SolarChat !!
Topic: HA and CaK Disks and a sloshing AR3041 6/29/2022
Replies: 8
Views: 113

Re: HA and CaK Disks and a sloshing AR3041 6/29/2022

Nice set of images and animation Warren!
by marktownley
Wed Jun 29, 2022 9:41 pm
Forum: This is SolarChat !!
Topic: June 28 AR3040 and Granulation
Replies: 5
Views: 111

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: 103

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: 19
Views: 187

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: 19
Views: 187

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: 25
Views: 740

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: 4
Views: 121

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: 60

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: 19
Views: 187

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: 119

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: 25
Views: 740

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: 32
Views: 299

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: 11
Views: 157

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: 13
Views: 159

Re: 28.06.2022 AR3040

Nice shots Chris!