Search found 3296 matches

by Valery
Mon Sep 16, 2019 6:16 pm
Forum: Commercial Solar Filters/Cameras/Hardware
Topic: What do you think is the most versatile high resolution solar telescope design?
Replies: 20
Views: 1436

Re: What do you think is the most versatile high resolution solar telescope design?

I found no one who don't believe that SCT has a huge sphero-chromatism in a blue-violet-UV and in red, far red and IR. Yes, the best high res universal solar telescope is a pure reflector. For me - a Cassegrain or better a Ritchie-Chretien like our friend Jean Pierre Brahic has (14" Cassegrain with ...
by Valery
Mon Sep 16, 2019 10:06 am
Forum: Commercial Solar Filters/Cameras/Hardware
Topic: What do you think is the most versatile high resolution solar telescope design?
Replies: 20
Views: 1436

Re: What do you think is the most versatile high resolution solar telescope design?

langleif2 wrote:
Mon Sep 16, 2019 8:38 am
Hey, that's a fine picture, Valery, but it's not sharp even when using sharpness algorithms.

Leif,

It is not sharp??? Hah, take a look and see what is the scale there! There the theoretical resolution has been reached. It can't be sharper even a same size reflector will be used.

Valery
by Valery
Mon Sep 16, 2019 4:57 am
Forum: Commercial Solar Filters/Cameras/Hardware
Topic: What do you think is the most versatile high resolution solar telescope design?
Replies: 20
Views: 1436

Re: What do you think is the most versatile high resolution solar telescope design?

Here is the image in UV continuum at 393nm taken by me with a large SCT. No special balow UV corrective lens.

download/file.php?id=34233

Anyone have any notice about the sharpness of the sun limb at this image?


Valery
by Valery
Sun Sep 15, 2019 6:02 pm
Forum: This is SolarChat !!
Topic: Slim Pickings.... 14th Sept '19
Replies: 9
Views: 96

Re: Slim Pickings.... 14th Sept '19

Excellent image, Stu!


Valery
by Valery
Thu Sep 12, 2019 3:09 am
Forum: This is SolarChat !!
Topic: 14 May 2019 Spectroheliograms
Replies: 15
Views: 166

Re: 14 May 2019 Spectroheliograms

Hi Peter,

Glad to see you recovered and active.

All these images are nice. But I most impressed with HeD3 one.

And it will be interested to see the Ca II I at 8542.1A.


Valery
by Valery
Wed Sep 11, 2019 6:20 am
Forum: This is SolarChat !!
Topic: H-Alpha close-ups on 6 Sep
Replies: 12
Views: 162

Re: H-Alpha close-ups on 6 Sep

I should probably add, that Alfred did only a very mild processing of the image. I took a freedom and have processed this image more deeply. A lot of more detail jumped out of the image!
by Valery
Mon Sep 09, 2019 11:48 pm
Forum: This is SolarChat !!
Topic: H-Alpha close-ups on 6 Sep
Replies: 12
Views: 162

Re: H-Alpha close-ups on 6 Sep

Very nice, Alfred!

Too bad there is no good sunspot on the sun disk these days.

Valery.
by Valery
Fri Sep 06, 2019 4:08 pm
Forum: This is SolarChat !!
Topic: Quark Testing Round 5
Replies: 6
Views: 93

Re: Quark Testing Round 5

Jack, It seems this Quark sample has too much unevenness in bandwidth and transmission. In brighter areas, contrast is significantly worse than in darker areas. Yes, to some extent you can correct changes in brightness, but you cannot correct contrast and detail. In addition, such a Quark will not b...
by Valery
Fri Sep 06, 2019 2:49 pm
Forum: This is SolarChat !!
Topic: Quark Testing Round 5
Replies: 6
Views: 93

Re: Quark Testing Round 5

My advice: return this Quark and try to get better one.

I am impressed how the DayStar can sell these crap devices in such a large number.
by Valery
Thu Sep 05, 2019 6:52 am
Forum: This is SolarChat !!
Topic: AR2748 timelapse - 09/02/2019
Replies: 4
Views: 121

Re: AR2748 timelapse - 09/02/2019

What is the equipment you have used for this nice timelapse?


Valery
by Valery
Sun Sep 01, 2019 3:25 pm
Forum: This is SolarChat !!
Topic: CaK - 31st August
Replies: 6
Views: 126

Re: CaK - 31st August

Nice image in CaK!

BTW I guess the scale is undersampled. An optimal scale for CaK imaging is F/D= (pixels size) x7 (good seeing) (pixels size) x9 (excellent seeing).

Valery
by Valery
Tue Aug 27, 2019 12:13 am
Forum: This is SolarChat !!
Topic: CaK Saturday 24th August
Replies: 10
Views: 192

Re: CaK Saturday 24th August

Hi Alexandra, Wow!! Congrats!! Is this your first light with the Lunt CaK wedge? I have all items (ARIES D-ERF, C11, Lunt CaK wedge, ASI174 camera) but I am not sure if I can get great CAK images like yours. Alfred Do your imaging in the CaK in a proper time (early morning) with aperture stop 230-2...
by Valery
Tue Aug 27, 2019 12:10 am
Forum: This is SolarChat !!
Topic: CaK Saturday 24th August
Replies: 10
Views: 192

Re: CaK Saturday 24th August

Thanks guys, yes this is my first light with the Aries ERF and the repaired Lunt CaK wedge. My first try out so I know I can do better :hamster: I look forward to some spots as trying to focus on a blank background is hard. I also need to get my head around a PST modification, no money for that yet...
by Valery
Sun Aug 25, 2019 4:54 pm
Forum: This is SolarChat !!
Topic: 24Aug19 - Some fibrils with C11
Replies: 14
Views: 212

Re: 24Aug19 - Some fibrils with C11

marktownley wrote:
Sun Aug 25, 2019 4:21 pm
That looks a lovely site to image, I can imagine the seeing will be better... Look forward to the results.
I think so too.


Valery
by Valery
Thu Aug 22, 2019 7:54 pm
Forum: Solar Scope Modifications
Topic: Is a C8 and a PST mod really usable?
Replies: 17
Views: 348

Re: Is a C8 and a PST mod really usable?

What I did, the Baader filter was in place up front the PST mod at the exit of the C8 (The focus is measured when I see a sharp image with the PST mod and binoviewer in place, because that's where it's usable). I then removed the mod and measured the distance to focus point (the sharp image) albeit...
by Valery
Wed Aug 21, 2019 2:35 am
Forum: This is SolarChat !!
Topic: Ha images with the C8 on August 18
Replies: 8
Views: 171

Re: Ha images with the C8 on August 18

Hi Christian,

Images are imapressive for such a tiny :) aperture.


Valery
by Valery
Wed Aug 21, 2019 2:24 am
Forum: This is SolarChat !!
Topic: C8 + Front ERF + TZ x2.7 from St Veran
Replies: 11
Views: 203

Re: C8 + Front ERF + TZ x2.7 from St Veran

Alex,

Nice H-a results.

BTW what is the H-a etalon has been used in this set up?


Valery
by Valery
Mon Aug 19, 2019 4:05 am
Forum: This is SolarChat !!
Topic: Saturday Sun, Polar Faculae and Bright Points - 17th August
Replies: 14
Views: 219

Re: Saturday Sun, Polar Faculae and Bright Points - 17th August

What we really want to see on your images - are the cycle-25 quite certain signs !

Nice images, Mark


Valery
by Valery
Thu Aug 15, 2019 3:35 am
Forum: This is SolarChat !!
Topic: The quiet Sun in different wave lengths. C11 scope.
Replies: 7
Views: 206

The quiet Sun in different wave lengths. C11 scope.

Hi all, Recent and not so recent images of the quiet sun in H-a, CaK and in 393nm continuum filters. At the images taken with 393nm continuum filter you can easily see numerous filirgees between granulation cells. The key factor of their successful imaging is very short exposure time which was possi...
by Valery
Thu Aug 08, 2019 4:49 am
Forum: This is SolarChat !!
Topic: Small AR2747 in Ha
Replies: 11
Views: 181

Re: Small AR2747 in Ha

Excellent image, Stu.

Your DS works great. Too bad you didn't use your large RC scope.


Valery
by Valery
Tue Aug 06, 2019 3:14 pm
Forum: This is SolarChat !!
Topic: Monday Sunshine and the Trees Be Gone! - 5th August
Replies: 21
Views: 364

Re: Monday Sunshine and the Trees Be Gone! - 5th August

Here is the image I processed a bit further to my taste. :)

The scale is 115% to the original image from here.

Hope you like it, Mark.

Valery
by Valery
Tue Aug 06, 2019 10:30 am
Forum: This is SolarChat !!
Topic: Monday Sunshine and the Trees Be Gone! - 5th August
Replies: 21
Views: 364

Re: Monday Sunshine and the Trees Be Gone! - 5th August

Hi Mark,

Congrats with your victory in the trees cut-off war!

Excellent images, I like them.

BTW You inspired me to see more deeply what is still hidden in your best image.
And I found a lot more. If you don't mind, I will post my findings.

Valery
by Valery
Mon Aug 05, 2019 11:11 am
Forum: This is SolarChat !!
Topic: Ha HR details on a Sun with no detail - 4 August - C8 EdgeHD
Replies: 7
Views: 204

Re: Ha HR details on a Sun with no detail - 4 August - C8 EdgeHD

Very nice images, Christian!

Thanks for sharing them with us.

What is the MN05A device in your imaging train?


Valery
by Valery
Mon Jul 29, 2019 2:55 pm
Forum: This is SolarChat !!
Topic: Solar Sunday
Replies: 22
Views: 445

Re: Solar Sunday

Glad to see the porblem with CaK filter solved and your excellent images, Alexandra!

Great to see you guys on photos.

Valery