Search found 167 matches

by Bruce G
Sun Apr 25, 2021 4:04 pm
Forum: This is SolarChat !!
Topic: Attached Image Size on Posts
Replies: 37
Views: 703

Re: Attached Image Size on Posts

Bruce, thanks for the offer. The current attachment/database size on this forum is over 40GB...GIGAbytes. I am not aware of any way to share dropbox stored images automatically on this forum or how to have uploaded images sent to a dropbox. Since everyone already has at least 5GB of free storage sp...
by Bruce G
Thu Apr 22, 2021 2:55 pm
Forum: This is SolarChat !!
Topic: Attached Image Size on Posts
Replies: 37
Views: 703

Re: Attached Image Size on Posts

Last year I volunteered to finance a Dropbox to be owned by the site.
The offer still stands

Bruce G
by Bruce G
Wed Apr 21, 2021 7:35 pm
Forum: This is SolarChat !!
Topic: Full disk and AR2816 from 18 April
Replies: 4
Views: 71

Re: Full disk and AR2816 from 18 April

DeepSolar64 wrote: Wed Apr 21, 2021 3:07 pm Very nice! Congratulations on the SPOD!!

Thanks! Sure surprised me
by Bruce G
Tue Apr 20, 2021 4:33 pm
Forum: This is SolarChat !!
Topic: Nooby question about mounting solar scope
Replies: 8
Views: 147

Re: Nooby question about mounting solar scope

Welcome Fed For your first solar scope you might want to drop the DS etalon and use that money elsewhere. They can be confusing and fiddly to use at first. And my experience has been that the seeing has to be good in order to take advantage of their capabilities. As a result, I find I don't use the ...
by Bruce G
Tue Apr 20, 2021 2:40 pm
Forum: This is SolarChat !!
Topic: Full disk and AR2816 from 18 April
Replies: 4
Views: 71

Full disk and AR2816 from 18 April

Nothing special, just trying to stay in practice Fair to poor seeing I didn't notice that big loop prominence, located at about 3:30, until I started processing the images LS80T Baader VIP barlow used at 1.2x ZWO ASI174MM 2021_04_18 Full disk A.jpg LS80T TeleVue 5x barlow Daystar Interference Elimin...
by Bruce G
Tue Apr 20, 2021 2:40 pm
Forum: SPoD Archive
Topic: Full disk and AR2816 from 18 April
Replies: 1
Views: 41

Full disk and AR2816 from 18 April

Nothing special, just trying to stay in practice Fair to poor seeing I didn't notice that big loop prominence, located at about 3:30, until I started processing the images LS80T Baader VIP barlow used at 1.2x ZWO ASI174MM 2021_04_18 Full disk A.jpg LS80T TeleVue 5x barlow Daystar Interference Elimin...
by Bruce G
Sun Nov 29, 2020 11:43 pm
Forum: This is SolarChat !!
Topic: A lot going on
Replies: 9
Views: 224

A lot going on

The seeing has been very poor here lately, but with all that's going on, I had to have a go at it. I'm not going to have very many cloud free days for a while anyway Bruce G I found that my camera was undersampled when shooting full disk images. I bought a Baader VIP Barlow, which is intended to be ...
by Bruce G
Sat Nov 21, 2020 9:33 pm
Forum: This is SolarChat !!
Topic: New roll-off-roof
Replies: 42
Views: 1118

Re: New roll-off-roof

Great work.
We're all envious - but looking forward to more of your excellent images

Bruce G
by Bruce G
Sat Nov 21, 2020 8:32 pm
Forum: This is SolarChat !!
Topic: The first moving picture
Replies: 1
Views: 163

The first moving picture

Something I just learned today: Predating Muybridge's work by 4 years, the first moving picture was a series of images of a solar transit by Venus in 1874, credited to Pierre Jules César Janssen and produced using a camera specially built for the purpose, called a "photographic revolver." ...
by Bruce G
Mon Oct 05, 2020 1:26 am
Forum: This is SolarChat !!
Topic: September 26, 12773 H-a closeup 04 Oct. updated
Replies: 25
Views: 877

Re: September 26, 12773 H-a closeup

Wonderful images
Thank you

Bruce G
by Bruce G
Sat Oct 03, 2020 9:19 pm
Forum: This is SolarChat !!
Topic: AR2773 10/01/2020 with fantastic filament
Replies: 19
Views: 586

Re: AR2773 10/01/2020 with fantastic filament

Very nice. Excellent detail
by Bruce G
Sun Sep 27, 2020 1:04 am
Forum: SPoD Archive
Topic: AR2773 on 20230_09_25 with decent seeing through thin haze
Replies: 5
Views: 174

AR2773 on 20230_09_25 with decent seeing through thin haze

Finally some OK seeing around these parts. The last time I had good seeing was with a thin overcast too. I'm wondering if there is a relationship

Lunt LS80, single stack
TeleVue 5x Powermate
ZWO ASI174MM
AR2773 2020_09_25a.jpg
AR2773 2020_09_25a.jpg (692.65 KiB) Viewed 210 times
AR2773 2020_09_25 colored1.jpg
AR2773 2020_09_25 colored1.jpg (801.89 KiB) Viewed 210 times
by Bruce G
Sun Sep 27, 2020 1:04 am
Forum: This is SolarChat !!
Topic: AR2773 on 20230_09_25 with decent seeing through thin haze
Replies: 5
Views: 197

AR2773 on 20230_09_25 with decent seeing through thin haze

Finally some OK seeing around these parts. The last time I had good seeing was with a thin overcast too. I'm wondering if there is a relationship

Lunt LS80, single stack
TeleVue 5x Powermate
ZWO ASI174MM
AR2773 2020_09_25a.jpg
AR2773 2020_09_25a.jpg (692.65 KiB) Viewed 197 times
AR2773 2020_09_25 colored1.jpg
AR2773 2020_09_25 colored1.jpg (801.89 KiB) Viewed 197 times
by Bruce G
Sat Sep 26, 2020 11:47 pm
Forum: SPoD Archive
Topic: Imaging from home (T300 Solar newton, K-Line
Replies: 16
Views: 378

Re: Imaging from home (T300 Solar newton, K-Line

Very nice granulation in your images. Well done!

Bruce G
by Bruce G
Sat Sep 26, 2020 11:47 pm
Forum: This is SolarChat !!
Topic: Imaging from home (T300 Solar newton, K-Line
Replies: 19
Views: 556

Re: Imaging from home (T300 Solar newton, K-Line

Very nice granulation in your images. Well done!

Bruce G
by Bruce G
Thu Sep 24, 2020 12:19 am
Forum: SPoD Archive
Topic: H-alpha Sun 2020-9-23
Replies: 10
Views: 285

Re: H-alpha Sun 2020-9-23

Splendid detail in that shot!

Bruce G
by Bruce G
Thu Sep 24, 2020 12:19 am
Forum: This is SolarChat !!
Topic: H-alpha Sun 2020-9-23
Replies: 14
Views: 454

Re: H-alpha Sun 2020-9-23

Splendid detail in that shot!

Bruce G
by Bruce G
Sun Sep 20, 2020 7:27 pm
Forum: This is SolarChat !!
Topic: Having trouble tuning Lunt LS80MT Double Stack
Replies: 14
Views: 393

Re: Having trouble tuning Lunt LS80MT Double Stack

Andrew, That's a fine image. There's simply nothing much to see up there right now. As soon as we get even a decent filament I think you'll see the difference. I'll second the suggestion of going single stack for a bit. But if the Sun perks up, you have clear skies and good seeing, you'll definitely...
by Bruce G
Sun Sep 20, 2020 12:49 am
Forum: This is SolarChat !!
Topic: Sun up close. 1.5m GREGOR telescope.
Replies: 12
Views: 416

Re: Sun up close. 1.5m GREGOR telescope.

Fantastic animation. I get mesmerized by those things. What are we seeing at 430 nm? This is apparently the CH G band. I found this: "Whereas the main source of line opacity in the solar atmosphere is atomic lines, the solar spectrum also contains several strong molecular features. The most pro...
by Bruce G
Sun Sep 20, 2020 12:00 am
Forum: This is SolarChat !!
Topic: Having trouble tuning Lunt LS80MT Double Stack
Replies: 14
Views: 393

Re: Having trouble tuning Lunt LS80MT Double Stack

Is this the configuration that you're using? If so, you don't have the drawtube adjusted properly. As Terry suggested, get the camera out of the system and work visually at first until you're sure you have everything right. Adding the second etalon will indeed change the focus, since you change the ...
by Bruce G
Fri Sep 11, 2020 1:36 pm
Forum: This is SolarChat !!
Topic: Competition Winner- Alexandra
Replies: 37
Views: 1094

Re: Competition Winner- Alexandra

Congratulations Alexandra!

Nice to see you too

Bruce G
by Bruce G
Thu Sep 10, 2020 7:51 pm
Forum: This is SolarChat !!
Topic: How much pressure is in a pressure tuned etalon? And more
Replies: 16
Views: 535

Re: How much pressure is in a pressure tuned etalon? And more

Ralston ( https://www.ralstoninst.com/calibration-test-pumps ) makes a precision hand pump that can do pressure, vacuum, or both, with both coarse and fine tuning adjustment. I use it on my vacuum-tuned internal etalon: https://solarchatforum.com/viewtopic.php?f=10&t=15443&start=75#p196348 ...
by Bruce G
Thu Sep 10, 2020 7:23 pm
Forum: This is SolarChat !!
Topic: How much pressure is in a pressure tuned etalon? And more
Replies: 16
Views: 535

Re: How much pressure is in a pressure tuned etalon? And more

Bob, Excellent! The plot tells me everything that I need to know. Where did you find that? I was looking for detailed information on the etalons, but never got much past marketing info or general descriptions. Rod, I like your suggestion of the two stage adjustment. Did you notice that the cap is qu...
by Bruce G
Thu Sep 10, 2020 1:06 am
Forum: This is SolarChat !!
Topic: How much pressure is in a pressure tuned etalon? And more
Replies: 16
Views: 535

Re: How much pressure is in a pressure tuned etalon? And more

Brian Thank you. That helps a lot. There must be more internal volume in there than is apparent. A lower pressure makes everything a whole lot easier. I kind of wonder what would get overpressured above 25 psi. Internal components are solid, so a pressure differential appears only at the end seals a...
by Bruce G
Wed Sep 09, 2020 6:27 pm
Forum: This is SolarChat !!
Topic: How much pressure is in a pressure tuned etalon? And more
Replies: 16
Views: 535

Re: How much pressure is in a pressure tuned etalon? And more

Thanks. I've already disassembled to that level. What I need to know is what the inside of the sealed part looks like.

The videos do illustrate the pieces of hardware that I'm talking about very nicely though, so that is helpful