Search found 24200 matches

by marktownley
Wed Sep 19, 2018 6:40 am
Forum: Commercial Solar Filters/Cameras/Hardware
Topic: Experimenting calcium imaging with small refractors
Replies: 10
Views: 162

Re: Experimenting calcium imaging with small refractors

christian viladrich wrote:
Tue Sep 18, 2018 7:49 pm
The only drawback of the TOA 150 is its the price and ... its aperture. I wish I have a TOA 200 ;-)
:D :D :D
by marktownley
Wed Sep 19, 2018 6:37 am
Forum: Commercial Solar Filters/Cameras/Hardware
Topic: New Skywatcher Solarquest mount
Replies: 9
Views: 225

Re: New Skywatcher Solarquest mount

Thanks Bart, I thought that might be the case.
by marktownley
Tue Sep 18, 2018 2:35 pm
Forum: Commercial Solar Filters/Cameras/Hardware
Topic: New Skywatcher Solarquest mount
Replies: 9
Views: 225

Re: New Skywatcher Solarquest mount

That was my thought too Pedro, I quite fancy the idea of something for quick grab and go full disks that I can just carry the scope and mount out in one go (in between the clouds!) - be interesting how you get on Pedro. You don't have clouds where you are very often so give it a try covering the sen...
by marktownley
Tue Sep 18, 2018 2:27 pm
Forum: Commercial Solar Filters/Cameras/Hardware
Topic: Experimenting calcium imaging with small refractors
Replies: 10
Views: 162

Re: Experimenting calcium imaging with small refractors

Interesting comparison Raf. I did something similar several years ago with CaK. I get some reasonable images with my ED80 at higher magnifications I find, once I'm upto about f15-f25. Frederics website has some great measurements of spherochromatism https://airylab.com/astronomy-test-reports/ Regard...
by marktownley
Sun Sep 16, 2018 9:53 pm
Forum: This is SolarChat !!
Topic: Chromosphere September 16th
Replies: 8
Views: 148

Re: Chromosphere September 16th

Looking good Franco! Another cloudy weekend for me.
by marktownley
Sun Sep 16, 2018 8:06 pm
Forum: This is SolarChat !!
Topic: Tunable Calcium module by Apollo Lasky
Replies: 6
Views: 219

Re: Tunable Calcium module by Apollo Lasky

I want to try a few ideas with my skybender, these recent threads have been giving me some ideas ;)
by marktownley
Sun Sep 16, 2018 8:04 pm
Forum: Commercial Solar Filters/Cameras/Hardware
Topic: New Skywatcher Solarquest mount
Replies: 9
Views: 225

Re: New Skywatcher Solarquest mount

I wonder if it will stop tracking when the sun goes behind a cloud?
by marktownley
Sun Sep 16, 2018 7:58 pm
Forum: This is SolarChat !!
Topic: CaK from September 4th, 2018
Replies: 2
Views: 86

Re: CaK from September 4th, 2018

Good results!
by marktownley
Sun Sep 16, 2018 7:56 pm
Forum: This is SolarChat !!
Topic: Update on laptop and camera
Replies: 3
Views: 102

Re: Update on laptop and camera

I think I will be buying one very soon too.
by marktownley
Sun Sep 16, 2018 7:55 pm
Forum: This is SolarChat !!
Topic: Ca-H full disc of Sept. 13th
Replies: 6
Views: 104

Re: Ca-H full disc of Sept. 13th

Good shots Raf!
by marktownley
Sun Sep 16, 2018 7:53 pm
Forum: Solar Scope Modifications
Topic: A different PST Mod
Replies: 6
Views: 328

Re: A different PST Mod

Good scope there Pedro!
by marktownley
Sun Sep 16, 2018 7:50 pm
Forum: This is SolarChat !!
Topic: Calcium Chromosphere By apollo lasky
Replies: 6
Views: 225

Re: Calcium Chromosphere By apollo lasky

Thanks Apollo, don't you go skipping off now, things are just starting to get interesting...
by marktownley
Sun Sep 16, 2018 7:12 pm
Forum: This is SolarChat !!
Topic: New images of AR12671 GREAT SEEING!
Replies: 4
Views: 122

Re: Remembering old good times. 2017 08 20 GREAT SEEING!

Brilliant Valery! Can you describe the processing technique you use on the stacked image please?
by marktownley
Sun Sep 16, 2018 6:35 pm
Forum: This is SolarChat !!
Topic: Surface contrast in CaK for various filter bandpasses.
Replies: 18
Views: 373

Re: Surface contrast in CaK for various filter bandpasses.

Fascinating high brow solar science here Peter, i'm most impressed! This really does from an empirical way what we might realistically expect from our CaK devices.

Those dark structures are interesting though, i've regularly seen them too.
by marktownley
Sun Sep 16, 2018 12:27 pm
Forum: This is SolarChat !!
Topic: Tiny AR12721 in H-alpha and CaK: Sept10
Replies: 7
Views: 157

Re: Tiny AR12721 in H-alpha and CaK: Sept10

Very nice Peter. That 115mm Stellarvue seems a great performer at CaK wavelengths.
by marktownley
Sun Sep 16, 2018 6:47 am
Forum: This is SolarChat !!
Topic: NEW 12672 large group!!! 280mm + ARIES 295mm DERF + QUARK GREAT SEEING!
Replies: 13
Views: 537

Re: NEW 12672 large group!!! 280mm + ARIES 295mm DERF + QUARK GREAT SEEING!

That's a beauty Valery. When you start trying that SSM it will be very interesting to see what values it comes back with.
by marktownley
Sat Sep 15, 2018 5:39 pm
Forum: Solar Scope Modifications
Topic: Narrowest 393.37 ever by Apollo Lasky
Replies: 152
Views: 3810

Re: Narrowest 393.37 ever by Apollo Lasky

Very good bob and apollo, glad this is working out!
by marktownley
Wed Sep 12, 2018 7:30 pm
Forum: Solar Scope Modifications
Topic: Narrowest 393.37 ever by Apollo Lasky
Replies: 152
Views: 3810

Re: Narrowest 393.37 ever by Apollo Lasky

Good results Apollo!
by marktownley
Tue Sep 11, 2018 8:18 pm
Forum: Solar Astronomy Shop and Swap
Topic: Truss Solar Newton T250 for Ha and CaK
Replies: 3
Views: 181

Re: Truss Solar Newton T250 for Ha and CaK

Super scope! Good luck with the sale!
by marktownley
Sun Sep 09, 2018 5:52 am
Forum: Solar Scope Modifications
Topic: Narrowest 393.37 ever by Apollo Lasky
Replies: 152
Views: 3810

Re: 393.4 bp0.1 - yes it does exist.

Would love to see the results you are getting. I'm using a tilted 387/10 filter in my CaK system.
by marktownley
Sat Sep 08, 2018 2:01 pm
Forum: This is SolarChat !!
Topic: 8th September, sunpot on a spotless day
Replies: 10
Views: 164

Re: 8th September, sunpot on a spotless day

Great results Robert! Raining down here today so glad you've got better conditions.