Search found 3151 matches

by Valery
Sun Mar 17, 2019 4:29 pm
Forum: This is SolarChat !!
Topic: Sunday Sun 17th March '19
Replies: 9
Views: 74

Re: Sunday Sun 17th March '19

Hi Stu,

Very nice CaK images with 125mm scope! You can easily rise the scale up at 2x and images will be only better! Now they are really undersampled.

Valery
by Valery
Sun Mar 17, 2019 4:21 pm
Forum: This is SolarChat !!
Topic: Sunday Sunshine - 17th March
Replies: 11
Views: 99

Re: Sunday Sunshine - 17th March

Excellent images, Mark!

Your SM90II telescope looks like a keeper. And works even better with your Quark.

And CaK easily can be even better at about 1.5x larger scale!

Hope a good seeing came back.

Valery
by Valery
Sat Mar 16, 2019 2:36 pm
Forum: This is SolarChat !!
Topic: Solar images restoration.
Replies: 3
Views: 93

Solar images restoration.

Interesting reading for us. All is interesting, about image restoration on the page 119 and 131. https://books.google.com.ua/books?id=SDPxGZ1yPxsC&pg=PA120&lpg=PA120&dq=high+resolution+solar+Ha+images&source=bl&ots=8cP4JsNNDW&sig=ACfU3U0mnGb37IZZBSM64JPHKQ378N93_g&hl=ru&sa=X&ved=2ahUKEwiht4zt7obhAhX...
by Valery
Fri Mar 15, 2019 5:07 am
Forum: This is SolarChat !!
Topic: GAMMA SETTINGS QUESTION
Replies: 12
Views: 333

Re: GAMMA SETTINGS QUESTION

I will give the logarithmic histogram a go thanks Bruce. When I recording the sun, I use an 8bits mode and then camera and FC convert it and writes in a 16bit ser files. So, even if I stretch the histogram to about 90%, at the final 16bit file I have anough spare bits to process an image with no cu...
by Valery
Fri Mar 15, 2019 5:00 am
Forum: This is SolarChat !!
Topic: March 10, 2019 surface and proms
Replies: 12
Views: 186

Re: March 10, 2019 surface and proms

Phil,

Excellent images! All of them. Thanks for sharing them with this chat.


Valery
by Valery
Thu Mar 14, 2019 10:28 am
Forum: This is SolarChat !!
Topic: Sol from the 13th of March 2019.
Replies: 9
Views: 131

Re: Sol from the 13th of March 2019.

Thanks, Eric, for your nice series of images.
by Valery
Tue Mar 12, 2019 9:41 pm
Forum: This is SolarChat !!
Topic: GAMMA SETTINGS QUESTION
Replies: 12
Views: 333

Re: GAMMA SETTINGS QUESTION

marktownley wrote:
Tue Mar 12, 2019 4:45 pm
Any tips for limb shots Valery?
No special tips. I just set brightness, exposure and gamma so, that I see maximum details here include spiculaes. If needed I use 16bit recording mode. Then several "curves" tweaking again, for maximum details and shades visibility.
by Valery
Tue Mar 12, 2019 8:38 am
Forum: This is SolarChat !!
Topic: AR12734 March 6 2019. SW 150mm scope + Quark.
Replies: 6
Views: 129

Re: AR12734 March 6 2019. SW 150mm scope + Quark.

Montana wrote:
Tue Mar 12, 2019 8:32 am
Lovely to see these tiny regions in such detail :bow :hamster:

Why did you stack all 4000 frames?

Alexandra
I've stacked different number of frames and this stack came out very good too. So, I processed it.


Valery
by Valery
Sat Mar 09, 2019 8:47 pm
Forum: This is SolarChat !!
Topic: Citizen Science Update
Replies: 22
Views: 565

Re: Citizen Science Update

Another science potential may be imaging of white light flares, and the temporal evolution of pores. Given the rare occurrence, and/or unpredictable location on the sun, and lifetime (hours to a day or so in case of many pores) these are objects hard to image for the pros. A flexible and worldwide ...
by Valery
Sat Mar 09, 2019 4:36 pm
Forum: This is SolarChat !!
Topic: Today's SUN (20190309) | back to the LUNT152
Replies: 11
Views: 185

Re: Today's SUN (20190309) | back to the LUNT152

I like this set of images. Very well done.


Valery
by Valery
Sat Mar 09, 2019 11:14 am
Forum: This is SolarChat !!
Topic: GAMMA SETTINGS QUESTION
Replies: 12
Views: 333

GAMMA SETTINGS QUESTION

Mark T. writes: "I have been doing some experimentation with my PGR cameras lately, and are able to image in their native 10, 12 or 14bit output (depends on camera), i'm finding I can expose way up to >90% of the histogram with no issues in post processing or stacking. If I do this in 8 bit mode I f...
by Valery
Sat Mar 09, 2019 10:19 am
Forum: This is SolarChat !!
Topic: AR12734 March 6 2019. SW 150mm scope + Quark.
Replies: 6
Views: 129

Re: AR12734 March 6 2019. SW 150mm scope + Quark.

marktownley wrote:
Sat Mar 09, 2019 6:10 am
These are nice images Valery!
Thanks, Mark.


Valery.
by Valery
Sat Mar 09, 2019 2:49 am
Forum: This is SolarChat !!
Topic: AR12734 March 6 2019. SW 150mm scope + Quark.
Replies: 6
Views: 129

AR12734 March 6 2019. SW 150mm scope + Quark.

Hi all, Here are two active acreas at the sun as seen March 6 2019 with SkyWatcher 150mm F/5 refractor, ARIES 150mm DERF, TV 2x Powermate, standard Quark Chromosphere, 0,7x reducer and Basler ASA1920-155 camera IMX174 chip. F/43 at the etalon. Seeing was just average and good transparency at +14C. 4...
by Valery
Sat Mar 09, 2019 2:00 am
Forum: This is SolarChat !!
Topic: Sunspot in AR2734 Continues | + FD, Proms, Plages | March 7th 2019
Replies: 17
Views: 233

Re: Sunspot in AR2734 Continues | + FD, Proms, Plages | March 7th 2019

My understanding of gamma in Firecapture is that it is simply software manipulation, so it's not doing anything that I cannot do in post-processing, correct? Incorrect. You can see this easily - compare the view of the screen when you playback already recorded movies of the same area (for example A...
by Valery
Fri Mar 08, 2019 1:58 pm
Forum: Commercial Solar Filters/Cameras/Hardware
Topic: Lunt Calcium filter
Replies: 7
Views: 212

Re: Lunt Calcium filter

George and all, Do not remove Lunt pre-filter unless your image is too dark. As for camera use for CaK imaging. To realize full resolution at 393nm with IMX174 chip one need to get F/40. With IMX290 one need to get F/20-25. I bought 290MM camera for CaK imaging - it has better sensitivity, lower noi...
by Valery
Fri Mar 08, 2019 6:36 am
Forum: This is SolarChat !!
Topic: Sunspot in AR2734 Continues | + FD, Proms, Plages | March 7th 2019
Replies: 17
Views: 233

Re: Sunspot in AR2734 Continues | + FD, Proms, Plages | March 7th 2019

Yes, I set gamma to 100 and increased exposure values for the purpose of focus and for the screen shot. Otherwise, I shoot gamma neutral and require no gain. Sad! This is a very common mistake - to set gamma at a neutral value. One always will loose delicate shades in the final images. Gamma should...
by Valery
Thu Mar 07, 2019 8:15 am
Forum: This is SolarChat !!
Topic: Sol from the 6th of March 2019.
Replies: 10
Views: 136

Re: Sol from the 6th of March 2019.

Excellent series of images, Eric!

Always nice to see your works.


Valery
by Valery
Mon Mar 04, 2019 7:56 pm
Forum: This is SolarChat !!
Topic: Life of the quiet sun - an ultra small beautiful arc prominence through a 280mm telescope.
Replies: 7
Views: 211

Life of the quiet sun - an ultra small beautiful arc prominence through a 280mm telescope.

The sun is quiet now. But at a small scale it still alive and very busy . One just need a bigger scope to look and to study sun life at a low scale. Numerous changes are very fast - within minutes and even tens of seconds! Just look at this absolute beauty - an ultra small arc-like prominence (just ...
by Valery
Wed Feb 27, 2019 1:32 pm
Forum: This is SolarChat !!
Topic: Lifting filament 24 Febraury
Replies: 10
Views: 253

Re: Lifting filament 24 Febraury

Welcome back, Dave!

Excellent photos. Thanks for sharing them with us.


Valery
by Valery
Tue Feb 26, 2019 10:24 am
Forum: This is SolarChat !!
Topic: Today's Filament in High Res, Full Disc| 200mm HA | Feb 23rd 2019
Replies: 15
Views: 300

Re: Today's Filament in High Res, Full Disc| 200mm HA | Feb 23rd 2019

Marty, I am impressed with your setup pictures. Very compact and powerful solar telescope. Several times cheaper than Lunt 230THa and also more universal. Looking for new activity and your images. BTW. I received two inquires for the 8" ARIES filters right after your first series of photos with this...
by Valery
Tue Feb 26, 2019 12:17 am
Forum: Solar Scope Modifications
Topic: Love my Val ERF
Replies: 9
Views: 316

Re: Love my Val ERF

Hi Jack, Better to not use any sharpening in Autostakkert. Use the 16bit TIF stacked images from it in another image processing tools. I personally prefer AstraImage Pro 3.0 It consists excellent deconvolution tools like Lucy-Richardson, Maximum Entropy and Van Cittert. It also has Wavelet sharpenin...
by Valery
Mon Feb 25, 2019 3:54 am
Forum: This is SolarChat !!
Topic: Weekend of fun in the sun with lots of new equipment
Replies: 16
Views: 328

Re: Weekend of fun in the sun with lots of new equipment

Very nice images Alexandra, especially H alpha! I think we need to get Valery or Baader to address making a CaK spherical aberration corrector for the SCT, and the results will be even better! SCT performance.jpg Oh... I thinked about this many times already, but I am afraid there are too few poten...
by Valery
Mon Feb 25, 2019 3:43 am
Forum: This is SolarChat !!
Topic: Weekend of fun in the sun with lots of new equipment
Replies: 16
Views: 328

Re: Weekend of fun in the sun with lots of new equipment

Alexandra, congratulations with 11" + ARIES DERF first light!

Here is my take of the CaK image.

Next time try to stop down your telescope with 240mm mask and use TV 2.5x PowerMate to get better scale.
Also, for CaK image a ZWO ASI290MM camera is a must.

Valery
by Valery
Mon Feb 25, 2019 1:43 am
Forum: This is SolarChat !!
Topic: Photoshop settings for Ca color?
Replies: 2
Views: 92

Re: Photoshop settings for Ca color?

No, you can't get a true color for CaK. Computer monitor create a violet as deep purple - the mixture of blue with a doze of red. This is not what real CaK line produce!
So, only imitation: fully remove green, remain blue and add some red.

Valery