Search found 177 matches

by Bruce G
Mon Jul 04, 2022 1:21 am
Forum: This is SolarChat !!
Topic: Animation from 2022_06_18
Replies: 10
Views: 444

Re: Animation from 2022_06_18

Thanks Rigel

Histogram matching is certainly the way to go. I'll have to spend some time going through your method.
Much appreciated

Bruce G
by Bruce G
Sun Jul 03, 2022 12:39 pm
Forum: This is SolarChat !!
Topic: Animation from 2022_06_18
Replies: 10
Views: 444

Re: Animation from 2022_06_18

Thanks all It's clear that, at least in this case, 15 minutes is too long for individual frames in an animation. What sort of interval is commonly used? Recorded as a series of individual files or as a big file that is split up afterward? I find the animations fascinating, but a lot of work. Balanci...
by Bruce G
Fri Jul 01, 2022 2:14 pm
Forum: This is SolarChat !!
Topic: Animation from 2022_06_18
Replies: 10
Views: 444

Re: Animation from 2022_06_18

This portion here is from a single 15 minute segment of the capture
That thing is moving. Looks like about 150,000 kph.
Filament1.gif
Filament1.gif (1.99 MiB) Viewed 443 times
by Bruce G
Fri Jul 01, 2022 2:10 pm
Forum: This is SolarChat !!
Topic: Animation from 2022_06_18
Replies: 10
Views: 444

Animation from 2022_06_18

Sorry I've been absent for so long folks. Things have gotten kind of busy around here On the 18th of June I had some decent seeing and was able to produce a set of images taken at approximately 15 minute intervals over 2 1/4 hours. I hadn't noticed the extent of the activity until I started processi...
by Bruce G
Wed Jul 21, 2021 4:59 am
Forum: This is SolarChat !!
Topic: Haze
Replies: 6
Views: 340

Re: Haze

DeepSolar64 wrote: Wed Jul 21, 2021 4:54 am WoW, that's really good for a single stacked image!
Thanks! But that's the point. My photo was taken about 3:00 PM. The seeing is normally getting so bad by that time that I close up shop and take the images inside to start processing them.

Bruce G
by Bruce G
Wed Jul 21, 2021 4:08 am
Forum: This is SolarChat !!
Topic: Haze
Replies: 6
Views: 340

Haze

The last few days here were predicted to be clear, but forest fires in Canada have brought a heavy haze throughout the entire time period. I normally would not have been out taking pictures, but I just bought a new solar guider (Hutech Hinode) and was anxious to try it out. The guider did, in fact, ...
by Bruce G
Wed Jun 16, 2021 2:55 pm
Forum: This is SolarChat !!
Topic: AR2833 and prom
Replies: 10
Views: 323

AR2833 and prom

A little better seeing than usual yesterday morning (2021_06_15). I was able to get more detail out of this than the raw images promised. imPPG did a great job this time. Lunt LS80T single stack TeleVue 5x Powermate Daystar Interference Eliminator ZWO ASI174MM 2021_06_15 Spot and Prom2.jpg 2021_06_1...
by Bruce G
Thu Jun 10, 2021 8:36 pm
Forum: SPoD Archive
Topic: My version of the eclipse in Ha and WL
Replies: 9
Views: 487

My version of the eclipse in Ha and WL

Peak (partial) eclipse had already occurred at sunrise and a bank of clouds hugged the horizon. Through the telescope, the low, flat clouds made the Sun look something like Jupiter. Seeing that close to the horizon was, of course, awful. I was able to sneak in a couple of shots. I was surprised to s...
by Bruce G
Thu Jun 10, 2021 8:36 pm
Forum: This is SolarChat !!
Topic: My version of the eclipse in Ha and WL
Replies: 9
Views: 375

My version of the eclipse in Ha and WL

Peak (partial) eclipse had already occurred at sunrise and a bank of clouds hugged the horizon. Through the telescope, the low, flat clouds made the Sun look something like Jupiter. Seeing that close to the horizon was, of course, awful. I was able to sneak in a couple of shots. I was surprised to s...
by Bruce G
Sun May 16, 2021 5:47 pm
Forum: This is SolarChat !!
Topic: Ha-quickie May 16, 2021
Replies: 17
Views: 550

Re: Ha-quickie May 16, 2021

Beautiful detail on AR2822
by Bruce G
Sun Apr 25, 2021 4:04 pm
Forum: Forum Support Issues
Topic: Attached Image Size on Posts
Replies: 47
Views: 7219

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: Forum Support Issues
Topic: Attached Image Size on Posts
Replies: 47
Views: 7219

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: 248

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: 513

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: SPoD Archive
Topic: Full disk and AR2816 from 18 April
Replies: 1
Views: 348

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: This is SolarChat !!
Topic: Full disk and AR2816 from 18 April
Replies: 4
Views: 248

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: 452

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: 1840

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: 288

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: 1303

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: 892

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: 429

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 465 times
AR2773 2020_09_25 colored1.jpg
AR2773 2020_09_25 colored1.jpg (801.89 KiB) Viewed 465 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: 313

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 313 times
AR2773 2020_09_25 colored1.jpg
AR2773 2020_09_25 colored1.jpg (801.89 KiB) Viewed 313 times
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: 1050

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: SPoD Archive
Topic: Imaging from home (T300 Solar newton, K-Line
Replies: 16
Views: 873

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: 614

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: 678

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: 18
Views: 1286

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: 675

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: 18
Views: 1286

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: 1871

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: 1255

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: 1255

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: 1255

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: 1255

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
by Bruce G
Wed Sep 09, 2020 5:54 pm
Forum: This is SolarChat !!
Topic: How much pressure is in a pressure tuned etalon? And more
Replies: 16
Views: 1255

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

I could find only one other thread on the site that mentioned this and it seems to have ended shortly after the subject was brought up. I thought I would try to put some numbers to the question and what I found surprised me. I ask anyone who is interested in the subject to please help check my calcu...
by Bruce G
Mon Aug 31, 2020 3:43 pm
Forum: This is SolarChat !!
Topic: Lunt LS80 storage temp range
Replies: 10
Views: 677

Re: Lunt LS80 storage temp range

"I received my Lunt 60 mm last winter and quickly learned that cold temps degrade performance. "

Dan, could you be more specific please? What sort of degradation did you observe? I live in northern Michigan and it gets pretty cold here too. What should I be looking for?

Thanks

Bruce G
by Bruce G
Wed Aug 26, 2020 1:52 pm
Forum: Sunlit Earth
Topic: Landscapes and critters
Replies: 14
Views: 1688

Re: Landscapes and critters

Gorgeous - and I love damselflies and dragonflies!

Thanks
by Bruce G
Wed Aug 19, 2020 1:03 am
Forum: This is SolarChat !!
Topic: Does this appear to be overprocessed?
Replies: 14
Views: 896

Re: Does this appear to be overprocessed?

Rainer,

I'm afraid I don't have my own Dropbox. It's $20 a month for files this large and I just don't send that many files

Sorry

Bruce G
by Bruce G
Tue Aug 11, 2020 5:35 pm
Forum: This is SolarChat !!
Topic: Does this appear to be overprocessed?
Replies: 14
Views: 896

Re: Does this appear to be overprocessed?

tusted - The sand grains, or dots, from the Lucy-Richardson method are a reason I was looking at a different deconvolution method. Regarding the quality of posted images - what they do to my images on Facebook when I post them for friends is almost criminal. I want to cry sometimes and have even res...
by Bruce G
Tue Aug 11, 2020 3:08 am
Forum: This is SolarChat !!
Topic: Does this appear to be overprocessed?
Replies: 14
Views: 896

Re: Does this appear to be overprocessed?

Thanks for your comments folks. ammonthenephite and Astrophil - Yes, you're seeing what I'm talking about. Interesting that you should mention Topaz products, ammonthenephite. I used Topaz Gigapixel AI for the deconvolution. Aside from that though, it's all contrast and brightness adjustments in Pho...
by Bruce G
Mon Aug 10, 2020 11:36 pm
Forum: This is SolarChat !!
Topic: Does this appear to be overprocessed?
Replies: 14
Views: 896

Does this appear to be overprocessed?

I was working on some images of our little spot. The seeing was pretty poor, as is often the case for my location, but I was trying to squeeze out detail and I got to a point where nothing looks right to me now. Is the finer detail here merely processing artifacts? Please enlarge the image to full s...
by Bruce G
Thu Jul 23, 2020 2:56 pm
Forum: This is SolarChat !!
Topic: AR2767 - A little better than expected 2020_07_22
Replies: 4
Views: 573

AR2767 - A little better than expected 2020_07_22

The seeing was poor to fair and there was 75% cloud cover. But it was cumulus and I could sneak in a few frames between clouds. "Few", being the operative word. I normally capture sequences of 1000 frames using seeing-based capture. In this imaging session there was no time to wait for the...
by Bruce G
Wed Jul 22, 2020 9:55 pm
Forum: This is SolarChat !!
Topic: Today's SUN (20200722) | AR12767 (GOOD seeing)
Replies: 11
Views: 942

Re: Today's SUN (20200722) | AR12767 (GOOD seeing)

Very nice Pedro.
Great detail for being on the limb.
by Bruce G
Mon Jul 20, 2020 2:23 am
Forum: This is SolarChat !!
Topic: July 15 sun in fast mode
Replies: 12
Views: 1044

Re: July 15 sun in fast mode

Some great detail on those spicules and wispy prominences
by Bruce G
Tue Jul 07, 2020 11:51 pm
Forum: This is SolarChat !!
Topic: New video and a FD
Replies: 5
Views: 597

Re: New video and a FD

Very nice video. Thank you
by Bruce G
Tue Jul 07, 2020 4:54 pm
Forum: This is SolarChat !!
Topic: Good seeing on 6 July
Replies: 11
Views: 891

Re: Good seeing on 6 July

Thanks Mark. I have a 2.5x barlow that makes the Sun fill the sensor of the QHY, but there is no room at all for drift or prominences of any respectable size. A 2x would be perfect. I bought a 2x TeleVue a while back, but it's not built to adapt to a camera like the 2.5x and 5x are and I haven't loo...
by Bruce G
Tue Jul 07, 2020 2:55 pm
Forum: This is SolarChat !!
Topic: Good seeing on 6 July
Replies: 11
Views: 891

Re: Good seeing on 6 July

Thanks folks Here is a comparison of images (from 2017) made by the two cameras, about an hour apart, displayed at the same pixel scale for comparison. I didn't put much effort into the images, so this is more about the raw size of the image that each camera gives me to work with. Still, the benefit...
by Bruce G
Tue Jul 07, 2020 3:13 am
Forum: This is SolarChat !!
Topic: Good seeing on 6 July
Replies: 11
Views: 891

Good seeing on 6 July

Some actual good seeing for once. There was a haze in the sky, but it was fairly uniform. I got out the QHY camera which has a higher pixel density than my ZWO, but has a much slower frame rate, 1/10 of the ZWO. I usually can't use it under normal conditions because I can't focus the scope with the ...