Search found 2145 matches
- Mon Mar 18, 2024 7:39 pm
- Forum: This is SolarChat !!
- Topic: FD images taken on March 7, from 540 nm to Ca K / Alluxa and Altair filters
- Replies: 17
- Views: 464
Re: FD images taken on March 7, from 540 nm to Ca K / Alluxa and Altair filters
The image is great! 1、Alluxa 0.14 nm + 0.37 nm image K1 or K2? 2、How much bandwidth is required to see CAK Fibers on that disk? Thank you for your reply! Thanks !! The Alluxa 0.14 nm + 0.37 nm combination is still rather "large", which means we have both Ca K 3 (=center of Ca K line) and ...
- Sat Mar 16, 2024 6:40 pm
- Forum: SPoD Archive
- Topic: G Band better with the right kit!
- Replies: 31
- Views: 129
Re: G Band better with the right kit!
Very fine. Well done Nic !
- Sat Mar 16, 2024 6:40 pm
- Forum: This is SolarChat !!
- Topic: G Band better with the right kit!
- Replies: 40
- Views: 637
Re: G Band better with the right kit!
Very fine. Well done Nic !
- Wed Mar 13, 2024 9:03 pm
- Forum: SPoD Archive
- Topic: Coronal Mass Ejection (CME) from plasma filament, March 11
- Replies: 10
- Views: 93
Re: Coronal Mass Ejection (CME) from plasma filament, March 11
Very nice animation. Well done !
- Wed Mar 13, 2024 9:03 pm
- Forum: This is SolarChat !!
- Topic: Coronal Mass Ejection (CME) from plasma filament, March 11
- Replies: 20
- Views: 417
Re: Coronal Mass Ejection (CME) from plasma filament, March 11
Very nice animation. Well done !
- Wed Mar 13, 2024 9:00 pm
- Forum: This is SolarChat !!
- Topic: 6Mar - 3D Skybender First Light in Singapore
- Replies: 33
- Views: 589
Re: 6Mar - 3D Skybender First Light in Singapore
I found another good granulation image in Calcium-K from the same session: https://blogger.googleusercontent.com/img/b/R29vZ2xl/AVvXsEizwaw2XvLWBQBn9t4WMWp3VuP62Yn399yWNIWxoOwMeN5L5m5IpCTnb4c-mNXv6RnEibAgjuReG31OG-urv2On7ih5lfFMDXMZt3fFw8spawEPFr2s4EAuXPet2BIen6mqylqYENEliJsMw2k2ltAIuUOw8Fg3KCUMsJz...
- Wed Mar 13, 2024 8:57 pm
- Forum: This is SolarChat !!
- Topic: FD images taken on March 7, from 540 nm to Ca K / Alluxa and Altair filters
- Replies: 17
- Views: 464
Re: FD images taken on March 7, from 540 nm to Ca K / Alluxa and Altair filters
Thanks guys ! Nice set and comparison Christian, is a triple stack (2x Alluxa 0.14 nm + 0.37 nm) possible with the TOA? Yes, for example here : http://astrosurf.com/viladrich/astro/soleil/wl/2023/2023-09-26-1214-ChrVldr-AR3438-CaK-TS.jpg For FD images, the difference between triple stack (0.37 nm + ...
- Sun Mar 10, 2024 10:31 pm
- Forum: This is SolarChat !!
- Topic: FD images taken on March 7, from 540 nm to Ca K / Alluxa and Altair filters
- Replies: 17
- Views: 464
Re: FD images taken on March 7, from 540 nm to Ca K / Alluxa and Altair filters
That's a very nice comparison! Is this the Alluxa filter you have? https://alluxa.com/optical-filter-catalog/ultra-narrow-bandpass/393-44-0-37-od6-ultra-narrow-bandpass/ Kevin Yes Kevin, this is the 0.37 nm filter. The other Alluxa filter (the 0.14 nm) was a group order organized by an amateur who ...
- Sun Mar 10, 2024 3:44 pm
- Forum: This is SolarChat !!
- Topic: FD images taken on March 7, from 540 nm to Ca K / Alluxa and Altair filters
- Replies: 17
- Views: 464
- Sat Mar 09, 2024 2:12 pm
- Forum: This is SolarChat !!
- Topic: Coronal and prominence views from sea level
- Replies: 26
- Views: 534
Re: Coronal and prominence views from sea level
Excellent George ! The Ha version is amazing. Only a coronagraph can have such a detectivity away from the solar limb. I was wondering if the IMX 533 from Player One could be worth considering. It has a huge dynamic range, much larger than the ASI1600. But this would be only beneficial to Ha images,...
- Sat Mar 09, 2024 2:04 pm
- Forum: This is SolarChat !!
- Topic: Sun FD in H-Alpha, CaK and Continuum March 8th 2024
- Replies: 12
- Views: 276
Re: Sun FD in H-Alpha, CaK and Continuum March 8th 2024
Very nice images Arne !
- Sat Mar 09, 2024 2:02 pm
- Forum: This is SolarChat !!
- Topic: 8 March 2024
- Replies: 14
- Views: 271
Re: 8 March 2024
Splendid !
There are penombral waves visible on all spots :-)
There are penombral waves visible on all spots :-)
- Sat Mar 09, 2024 1:57 pm
- Forum: This is SolarChat !!
- Topic: 2 hours 15 minutes timelapse of AR13599 and 13600 in H-Alpha 7th of March 2024
- Replies: 16
- Views: 377
Re: 2 hours 15 minutes timelapse of AR13599 and 13600 in H-Alpha 7th of March 2024
Some nice action visible there.
Thanks for sharing Arne !
Thanks for sharing Arne !
- Sat Mar 09, 2024 1:52 pm
- Forum: This is SolarChat !!
- Topic: WL and H-alpha Friday 8 March2024
- Replies: 8
- Views: 176
Re: WL and H-alpha Friday 8 March2024
Nice shots Dave !
- Sat Mar 09, 2024 1:50 pm
- Forum: This is SolarChat !!
- Topic: FD images taken on March 7, from 540 nm to Ca K / Alluxa and Altair filters
- Replies: 17
- Views: 464
FD images taken on March 7, from 540 nm to Ca K / Alluxa and Altair filters
Hi, Here is set of images taken on March 7 with various filters from the continuum at 540 nm to Ca K. Baader 540 nm is a nice all arround filter. Facular plages are visible close to the solar limb : http://astrosurf.com/viladrich/astro/soleil/FD/2024/2024-03-07-1158-ChrVldr-540nm.jpg With the Altair...
- Wed Mar 06, 2024 5:39 pm
- Forum: This is SolarChat !!
- Topic: Reverse granule and AR 3595 sunspot group with Soleye Ca-K filter
- Replies: 10
- Views: 353
Re: Reverse granule and AR 3595 sunspot group with Soleye Ca-K filter
Hi Christian, The peak transmission of the filters is between 50-60%. This particular one is 56%. Have you been told what the peak transmission of the Solarspectrum Ca-K is? That would be a really exciting possibility. Laszlo Hi Laszlo, This is quite good considering the low altitude of the Sun. Wh...
- Tue Mar 05, 2024 9:27 pm
- Forum: This is SolarChat !!
- Topic: Reverse granule and AR 3595 sunspot group with Soleye Ca-K filter
- Replies: 10
- Views: 353
Re: Reverse granule and AR 3595 sunspot group with Soleye Ca-K filter
Hi Laszlo,
This is quite good considering the low altitude of the Sun.
What is the peak transmission of your 0.37 nm filter ?
This is quite good considering the low altitude of the Sun.
What is the peak transmission of your 0.37 nm filter ?
- Sat Mar 02, 2024 9:07 pm
- Forum: Commercial Solar Filters/Cameras/Hardware
- Topic: 3D-printed Baader 160mm ERF Holder
- Replies: 7
- Views: 254
Re: 3D-printed Baader 160mm ERF Holder
Simple but effective. Well done !
These 3D printers are great :-)
These 3D printers are great :-)
- Sat Mar 02, 2024 9:05 pm
- Forum: This is SolarChat !!
- Topic: Proms too messy?
- Replies: 6
- Views: 189
Re: Proms too messy?
Looks good to me :-)
- Sat Mar 02, 2024 9:04 pm
- Forum: This is SolarChat !!
- Topic: March 2nd, 2024 WL FD, Sun Halo & 850nm IR Shot
- Replies: 9
- Views: 296
Re: March 2nd, 2024 WL FD, Sun Halo & 850nm IR Shot
The 850 nm is very interesting since it shows plages accross the solar disk, a bit as a very low contrast Ca II IR filter.
Well done !
It would be interesting to compare this 850 nm filter to a G-band filter or a 393-3 nm (if you have one of these filters).
Thanks for sharing !
Well done !
It would be interesting to compare this 850 nm filter to a G-band filter or a 393-3 nm (if you have one of these filters).
Thanks for sharing !
- Sat Mar 02, 2024 9:01 pm
- Forum: This is SolarChat !!
- Topic: Topaz Photo AI - opinions...? (+my latest image)
- Replies: 27
- Views: 683
Re: Topaz Photo AI - opinions...? (+my latest image)
ust to come in from a tangent here and play devils advocate: Why do you need to denoise an image in the first place? My question would be where is the source of the noise? If it is stacking then more frames are needed, if it is in post processing then the source of noise is oversharpening either th...
- Sun Feb 25, 2024 9:27 am
- Forum: This is SolarChat !!
- Topic: Calcium Saturday 24th February
- Replies: 41
- Views: 1014
Re: Calcium Saturday 24th February
Splendid Mark !
The FD and the close-up images are great. The proms turn out very well !
I still have to do more tests to check if is better to take specific (longer) exposures for the proms, or not.
It could be that these current proms are very bright in Ca K.
The FD and the close-up images are great. The proms turn out very well !
I still have to do more tests to check if is better to take specific (longer) exposures for the proms, or not.
It could be that these current proms are very bright in Ca K.
- Sat Feb 24, 2024 3:33 pm
- Forum: This is SolarChat !!
- Topic: Big spot and first light of Altair 393-3nm filter / Ca K Alluxa 0.37 nm / 23 feb
- Replies: 18
- Views: 394
Re: Big spot and first light of Altair 393-3nm filter / Ca K Alluxa 0.37 nm / 23 feb
Thanks guys :-)
The filter is indeed an Altair 393-3 nm (and not an Antlia 393-3 nm). I guess Altair will soon provide information.
The filter is indeed an Altair 393-3 nm (and not an Antlia 393-3 nm). I guess Altair will soon provide information.
- Fri Feb 23, 2024 8:45 pm
- Forum: This is SolarChat !!
- Topic: CAK AR3590 after Biggest X flare (this cycle) 23 Feb 24 Singapore
- Replies: 22
- Views: 500
Re: CAK AR3590 after Biggest X flare (this cycle) 23 Feb 24 Singapore
Well done Alfred ! The respaced C6 is doing good in Ca K.
- Fri Feb 23, 2024 8:45 pm
- Forum: SPoD Archive
- Topic: CAK AR3590 after Biggest X flare (this cycle) 23 Feb 24 Singapore
- Replies: 24
- Views: 346
Re: CAK AR3590 after Biggest X flare (this cycle) 23 Feb 24 Singapore
Well done Alfred ! The respaced C6 is doing good in Ca K.
- Fri Feb 23, 2024 8:44 pm
- Forum: This is SolarChat !!
- Topic: AR3590 130minute cloud affected animation Up n Over Down Under
- Replies: 16
- Views: 331
Re: AR3590 130minute cloud affected animation Up n Over Down Under
Very nice animation. Well done !
- Fri Feb 23, 2024 8:09 pm
- Forum: This is SolarChat !!
- Topic: Big spot and first light of Altair 393-3nm filter / Ca K Alluxa 0.37 nm / 23 feb
- Replies: 18
- Views: 394
Big spot and first light of Altair 393-3nm filter / Ca K Alluxa 0.37 nm / 23 feb
Hi, Unexpected clearing this morning, and turbulence was quite low considering the low height of the Sun. I was good time give the Altair 393-3 nm its first light : http://astrosurf.com/viladrich/astro/soleil/FD/2024/2024-02-23-1109-ChrVldr-Altair393-3nm-IMX533.jpg The funny thing is that with this ...
- Sat Feb 10, 2024 10:20 am
- Forum: This is SolarChat !!
- Topic: Full Disc 09-02-2024
- Replies: 9
- Views: 250
Re: Full Disc 09-02-2024
Great shot Rainer !
This spot is impressive.
This spot is impressive.
- Tue Jan 30, 2024 4:25 pm
- Forum: Commercial Solar Filters/Cameras/Hardware
- Topic: Filter Tilt mount available soon from RAF camera
- Replies: 21
- Views: 1159
Re: Filter Tilt mount available soon from RAF camera
I don't think a double stack BF will help. I've done some simulations to test the idea some times ago, but 1 nm is way too large. It makes no difference. There is some benefits of double-stacking starting at about 2 A filter (and of course below). So, practically it means double stacking with a Lunt...
- Tue Jan 30, 2024 2:19 pm
- Forum: Commercial Solar Filters/Cameras/Hardware
- Topic: Filter Tilt mount available soon from RAF camera
- Replies: 21
- Views: 1159
Re: Filter Tilt mount available soon from RAF camera
Hi Bengt,blindqvist wrote: ↑Tue Jan 30, 2024 10:21 am When can i order the new Tilt-adapter from RAF, or can i already do it ? Does anybody know that ? Best regards, Bengt
Just send a send to Raf :
https://rafcamera.com/contact/
I hope to have mine (I've ordered three units) in a few weeks (including delivery delay).
- Fri Jan 26, 2024 8:34 pm
- Forum: This is SolarChat !!
- Topic: Down Under 3hours & 48minutes animation AR3559
- Replies: 20
- Views: 693
Re: Down Under 3hours & 48minutes animation AR3559
Splendid Peter !
- Fri Jan 26, 2024 5:06 pm
- Forum: This is SolarChat !!
- Topic: Comet and X-flare SOHO
- Replies: 10
- Views: 732
Re: Comet and X-flare SOHO
Thanks for the news !
It would be nice to have something like this (including CME) at next total solar eclipse ;-)
It would be nice to have something like this (including CME) at next total solar eclipse ;-)
- Fri Jan 26, 2024 4:55 pm
- Forum: This is SolarChat !!
- Topic: Sunspot superposition in 2023
- Replies: 18
- Views: 529
Re: Sunspot superposition in 2023
Awesome ! Very well done. Thanks for sharing.
- Thu Jan 18, 2024 2:46 pm
- Forum: Solar Scope Modifications
- Topic: Question about QUARK CAH bandwidth?
- Replies: 11
- Views: 516
Re: Question about QUARK CAH bandwidth?
Interesting. I would have thought a 5a design would be quite easy to do with filters alone. Given that the Quark Ca H is thermo-regulated, it is most probable that it is a mica-spaced etalon. On top of that the DayStar Quantum Ca K (or H) 2 A and 5 A filters are mica-spaced etalons. So the mica use...
- Wed Jan 17, 2024 10:46 am
- Forum: Solar Scope Modifications
- Topic: Question about QUARK CAH bandwidth?
- Replies: 11
- Views: 516
Re: Question about QUARK CAH bandwidth?
Since it is a 5A filter it will remain at 5A at its best i would say. I read the initial question too fast. The curve from DayStar DayStar is for 0.5 A Ha filters, so I thouch the question was about 0.5 A Ha Quark ... As said by Dennis, at f/30-40, a 5 A Ca K filter will have an effective FWHM of 5...
- Wed Jan 17, 2024 10:37 am
- Forum: Commercial Solar Filters/Cameras/Hardware
- Topic: Filter Tilt mount available soon from RAF camera
- Replies: 21
- Views: 1159
Filter Tilt mount available soon from RAF camera
Hi, For information, a tilt mount will be available soon from RAF camera. Here is a picture of the prototype : http://astrosurf.com/viladrich/astro/instrument/intrumentCaK/RAF-camera-tilt-mount.jpg The final version will be anodized and have other type of knobs. There is a M42x0.75 mm thread on both...
- Wed Jan 17, 2024 10:22 am
- Forum: Commercial Solar Filters/Cameras/Hardware
- Topic: Barlow with Lunt CaK
- Replies: 9
- Views: 489
Re: Barlow with Lunt CaK
What size is your Barlow lens ?
As long as the light beam does not touch the metal body of the Barlow, there is no issue.
In orther words, you can use : refractor > Barlow lens > Lunt Ca K with no problem if the light beam passes only through the lens of the Barlow and does not touch its body.
As long as the light beam does not touch the metal body of the Barlow, there is no issue.
In orther words, you can use : refractor > Barlow lens > Lunt Ca K with no problem if the light beam passes only through the lens of the Barlow and does not touch its body.
- Wed Jan 17, 2024 10:14 am
- Forum: Solar Scope Modifications
- Topic: Question about QUARK CAH bandwidth?
- Replies: 11
- Views: 516
Re: Question about QUARK CAH bandwidth?
I am sorry to say this curve from DayStar white paper is completely wrong. It is impossible to have a material (mica, fused silica, or whatever) giving a curve like this. The best possible fit is to have an index of 1.96 for the etalon gap, which is very far from the 1.65 index of mica. See more in ...
- Sat Jan 13, 2024 1:59 pm
- Forum: This is SolarChat !!
- Topic: Ha belated Ha images taken with Mewlon 250 / Sept 10 and Aug 14, 2023
- Replies: 12
- Views: 585
Re: Ha belated Ha images taken with Mewlon 250 / Sept 10 and Aug 14, 2023
Thanks guys !! Very good Christian! The 462 seems to have handled the high gain well. This year, I will try higher gain values in order to get shorter exposure times. I don't know yet where is the sweet spot. What is the central obstruction on the Mewlon scope? It isn't as large as a RC or SCT if I ...
- Sat Jan 13, 2024 1:51 pm
- Forum: This is SolarChat !!
- Topic: [Beginner] Help with noisy background
- Replies: 13
- Views: 428
Re: [Beginner] Help with noisy background
Hi,
The 5x Barlow is really too much. You should use a 3x instead, in order to have a f/30 ratio, which is fine given the pixel size of the IMX174.
The, you will have more light which, in combination to using an exposure time around 4-5 ms, will allow to use a much lower gain.
The 5x Barlow is really too much. You should use a 3x instead, in order to have a f/30 ratio, which is fine given the pixel size of the IMX174.
The, you will have more light which, in combination to using an exposure time around 4-5 ms, will allow to use a much lower gain.
- Sat Jan 13, 2024 9:54 am
- Forum: This is SolarChat !!
- Topic: Ha belated Ha images taken with Mewlon 250 / Sept 10 and Aug 14, 2023
- Replies: 12
- Views: 585
Ha belated Ha images taken with Mewlon 250 / Sept 10 and Aug 14, 2023
Hi, Here are some old Ha images taken last year with the Mewlon 250 and a double-stack configuration on Sept 10 and August 14. This image of the solar limb gives a nice 3D effect of the apparent surface of the chromosphere : http://astrosurf.com/viladrich/astro/soleil/wl/2023/2023-09-10-1044-ChrVldr...
- Wed Jan 10, 2024 4:16 pm
- Forum: This is SolarChat !!
- Topic: Inferno froze over and after two months the sky is clear 10.01.
- Replies: 17
- Views: 608
Re: Inferno froze over and after two months the sky is clear 10.01.
Spectacular images Petr !
As James I was wondering where you were gone, or maybe you had bad weather.
I hope things will get better as fast as possible. Take care.
Christian
As James I was wondering where you were gone, or maybe you had bad weather.
I hope things will get better as fast as possible. Take care.
Christian
- Wed Jan 03, 2024 6:21 pm
- Forum: Commercial Solar Filters/Cameras/Hardware
- Topic: New CaK etalons from Solar Spectrum
- Replies: 22
- Views: 1512
Re: New CaK etalons from Solar Spectrum
Exciting news Bob !
I wonder what is the peak transmission of these filters. Do you have any data on this ?
I wonder what is the peak transmission of these filters. Do you have any data on this ?
- Tue Jan 02, 2024 8:23 pm
- Forum: Solar Scope Modifications
- Topic: LS50 at he BACK of a scope?
- Replies: 27
- Views: 2252
Re: LS50 at he BACK of a scope?
The graphs taken from http://www.astrosurf.com/viladrich/astro/instrument/solar/FP-Daystar.htm say that a double stack 0.6 has about the same or slightly wider FWHM than a single 0.3, but flatter tails to let in less of the far off-band continuum (so might even perform better). http://www.astrosurf...
- Tue Jan 02, 2024 8:14 pm
- Forum: Solar Scope Modifications
- Topic: LS50 at he BACK of a scope?
- Replies: 27
- Views: 2252
Re: LS50 at he BACK of a scope?
I would want to be able to do close-up feature images and cropping is just a waste of all that equipment. Hi, I am no sure what you mean by this. Are you considering a third option, in addition to the two options you've described above : - Option 1 : Lunt 60mm front etalon > Askar FRA500 > TZ-4 > S...
- Sun Dec 31, 2023 7:10 pm
- Forum: Solar Scope Modifications
- Topic: LS50 at he BACK of a scope?
- Replies: 27
- Views: 2252
Re: LS50 at he BACK of a scope?
Askar FRA500 is a 500mm focal length petzval. Just for the record, a Petzval is made of two doublets. So, the FRA 500 is definitely not a Peztval given it is a triplet + doublet. On top of that, Askar placed a patent on the design, which won't be possible if if was a Petzval. On the other hand, the...
- Sun Dec 31, 2023 6:56 pm
- Forum: Solar Scope Modifications
- Topic: LS50 at he BACK of a scope?
- Replies: 27
- Views: 2252
Re: LS50 at he BACK of a scope?
Now here's the next question I need to solve. I'm asking it as a continuation of this thread rather than a new thread because it still comes down to whether it's better to use a front etalon in front, or in back. (I'm including the explainers for anyone who is new to the hobby). Option 1 listed fro...
- Thu Dec 28, 2023 8:16 pm
- Forum: SPoD Archive
- Topic: Takahashi SKY 90/500 мм. DS90II.In a couple of months.
- Replies: 17
- Views: 866
Re: Takahashi SKY 90/500 мм. DS90II.In a couple of months.
This is splendid ! Processing is perfect. Well done !
- Thu Dec 28, 2023 8:16 pm
- Forum: This is SolarChat !!
- Topic: Takahashi SKY 90/500 мм. DS90II.In a couple of months.
- Replies: 25
- Views: 976
Re: Takahashi SKY 90/500 мм. DS90II.In a couple of months.
This is splendid ! Processing is perfect. Well done !
- Thu Dec 28, 2023 1:39 pm
- Forum: This is SolarChat !!
- Topic: Solar images taken this morning 2023.12.27
- Replies: 21
- Views: 875
Re: Solar images taken this morning 2023.12.27
Hi Michael,
Just wondering what is your exposure time and gain value with the continuum ?
Just wondering what is your exposure time and gain value with the continuum ?