Search found 3611 matches

by Merlin66
Wed Apr 29, 2020 8:46 am
Forum: Solar Radio, Magnetometry and Spectroscopy
Topic: apr 28 shg caH caK
Replies: 5
Views: 945

Re: apr 28 shg caH caK

John,
Well done!
It’s always good to see capable SHG images.
by Merlin66
Wed Apr 29, 2020 8:44 am
Forum: This is SolarChat !!
Topic: 28.4.20 Only one image again!
Replies: 10
Views: 965

Re: 28.4.20 Only one image again!

Russ,
Well done mate!
When a lot of us are clouded out, it always good to see what is happening on the solar disk.
Keep them coming.
by Merlin66
Fri Apr 24, 2020 9:59 am
Forum: This is SolarChat !!
Topic: Distribution of the prominences
Replies: 7
Views: 1406

Re: Distribution of the prominences

I agree, not very clear....
It suggests the proms are in lower latitudes at minimum, before gradually reaching higher latitudes and polar regions before maximum....
by Merlin66
Fri Apr 24, 2020 6:23 am
Forum: This is SolarChat !!
Topic: Animation 23/04/2020
Replies: 10
Views: 1625

Re: Animation 23/04/2020

Martin,
Well done mate!
Another great capture ...and animation!
by Merlin66
Fri Apr 24, 2020 1:37 am
Forum: This is SolarChat !!
Topic: Distribution of the prominences
Replies: 7
Views: 1406

Distribution of the prominences

I was re-reading Patrick Martinez's "The Observer's Guide to Astronomy", Vol 1 On p 73 (I'll try and get it copied...) he shows the distribution of proms throughout the solar cycle. The presented graph shows: 1. There are less proms during solar max 2. The proms follow a similar 11 year cycle - at m...
by Merlin66
Thu Apr 23, 2020 8:14 am
Forum: Commercial Solar Filters/Cameras/Hardware
Topic: DMK 41AU02.AS vs 174M with AR90/900 mod
Replies: 8
Views: 1792

Re: DMK 41AU02.AS vs 174M with AR90/900 mod

I get some Newton Rings issues with the ASI 174MM on narrow band H alpha.
I need a T2 tilter to resolve.
by Merlin66
Sun Apr 19, 2020 11:28 pm
Forum: Solar Software
Topic: Photoshop version and alternatives
Replies: 10
Views: 3658

Re: Photoshop version and alternatives

David,
Another alternative worth checking out is the latest PaintShop Pro. It's come a loooong way in the past few years and certainly gives PS a run for it's money. Layers, masking etc etc. Try before you buy, once of $$$$
https://www.paintshoppro.com/en/product ... /standard/
by Merlin66
Sun Apr 19, 2020 9:46 pm
Forum: This is SolarChat !!
Topic: Sol 18.04.2020 - First animation attempt
Replies: 12
Views: 2447

Re: Sol 18.04.2020 - First animation attempt

Well done mate!
I'm on the same learning curve.....if it was easy, everyone would be doing it!
by Merlin66
Sun Apr 19, 2020 9:43 pm
Forum: Commercial Solar Filters/Cameras/Hardware
Topic: Which camera to choose for full disk imaging
Replies: 4
Views: 2219

Re: Which camera to choose for full disk imaging

Full disk imaging at longer fl - bigger chips, SSD drives....
I went for the ASI 1600MM, 17.7 x 13.4mm chip with 3.8 micron pixels.
Another option is to use a x0.5 reducer - dropping the fl to around 400mm (giving a solar disk approx 4mm diam.)
There are many other options.
by Merlin66
Sun Apr 19, 2020 9:36 pm
Forum: This is SolarChat !!
Topic: animation of the prominence of April 15
Replies: 6
Views: 1923

Re: animation of the prominence of April 15

Well done mate!
Animations bring a sense of being there - it's alive!
by Merlin66
Sun Apr 19, 2020 9:36 pm
Forum: SPoD Archive
Topic: animation of the prominence of April 15
Replies: 7
Views: 1784

Re: animation of the prominence of April 15

Well done mate!
Animations bring a sense of being there - it's alive!
by Merlin66
Sun Apr 19, 2020 1:04 am
Forum: This is SolarChat !!
Topic: Help with 2.5x Powermate
Replies: 32
Views: 5243

Re: Help with 2.5x Powermate

Alexandra, Looking at the CN link you gave.... Using the T thread adaptor seems to have solved the users "reflection" issue.... I don't know what else to suggest... I don't see your central "hot spot" on my flats or images..... EDIT: What do flats look like with the PM and no other filters etc. just...
by Merlin66
Sat Apr 18, 2020 11:59 pm
Forum: This is SolarChat !!
Topic: 16th April 2020 Prom animation
Replies: 10
Views: 2335

Re: 16th April 2020 Prom animation

Thanks again!
Certainly a labour of love, but a very satisfying outcome.
Better seeing, and better cloud free access I think would provide a profitable incentive to doing some serious animations....
Neither of which I have ;)
Ken
by Merlin66
Sat Apr 18, 2020 11:26 am
Forum: This is SolarChat !!
Topic: 16th April 2020 Prom animation
Replies: 10
Views: 2335

Re: 16th April 2020 Prom animation

Thanks to everyone!
Appreciated.
by Merlin66
Sat Apr 18, 2020 4:14 am
Forum: This is SolarChat !!
Topic: 16th April 2020 Prom animation
Replies: 10
Views: 2335

16th April 2020 Prom animation

Call this a "proof of concept" Only twenty images with 30 sec interval - SM60DS/ ED80/ ASI 1600 Processed AS3!, Imppg, Corono and convert to GIF in PIPP. If I ever get to observe the sun (!!??) I'll try for a longer animation. (Thanks to Martin S. for all the help and support) Enjoy. trial3image015_...
by Merlin66
Thu Apr 16, 2020 4:34 am
Forum: Solar Software
Topic: ASI183 FPS and settings
Replies: 8
Views: 2796

Re: ASI183 FPS and settings

David, I used an ASI 183MM on my SM60 DS/ ED80 for a while and returned it to ZWO due to "technical issues when imaging solar Ha". They supplied an ASI 1600MM in exchange. I also use a x1.6 Barlow. I use SharpCapture with a zero gain setting of 139 and a gamma of 50. Vary the exposure to bring the h...
by Merlin66
Wed Apr 15, 2020 11:18 pm
Forum: This is SolarChat !!
Topic: Help with 2.5x Powermate
Replies: 32
Views: 5243

Re: Help with 2.5x Powermate

Alexandra,
I use the x2.5 PM most of the time with my ED80 and either the ASI 174 or ASI 1600 for white light, CaK and Ha.
I do use the T thread adaptor and a T2 tilter. The only real issue I have is the NR.
100_3362.JPG
100_3362.JPG (87.67 KiB) Viewed 2936 times
by Merlin66
Wed Apr 15, 2020 3:39 pm
Forum: This is SolarChat !!
Topic: Solar animation 13/04/2020
Replies: 10
Views: 2791

Re: Solar animation 13/04/2020

Well done mate!
Great result.
by Merlin66
Mon Apr 13, 2020 8:26 am
Forum: This is SolarChat !!
Topic: System for identifying locations on the sun
Replies: 4
Views: 2417

Re: System for identifying locations on the sun

The priority is to image such that north is to to top of the image.
Once you have achieved that (using the telescope movement controls) then GONG and Tilting Sun with give you the solar latitude and longitude.
by Merlin66
Sun Apr 12, 2020 7:56 am
Forum: This is SolarChat !!
Topic: Forum upgrades finally completed. sort of
Replies: 17
Views: 3557

Re: Forum upgrades finally completed. sort of

Well done mate.
Never easy....
by Merlin66
Thu Apr 09, 2020 11:19 am
Forum: This is SolarChat !!
Topic: 9.4.2020 AR12759 exits.
Replies: 12
Views: 3069

Re: 9.4.2020 AR12759 exits.

Using the x1.6 Barlow - OK for White Light and CaK but terrible NR in H alpha. Even the T2 tilter couldn't remove them! CaK shows the AR 2759 heading off and the new AR in the East... Ha showing the same.. Small faint proms SS SM60. Enjoy! Sun_095149.jpg Sun_095100.jpg Sun_095232.jpg Sun_102439f.jpg...
by Merlin66
Thu Apr 09, 2020 9:00 am
Forum: This is SolarChat !!
Topic: Ha Full Disk 8th April
Replies: 14
Views: 3499

Re: Ha Full Disk 8th April

The new AR is visible in CaK and H alpha.
by Merlin66
Tue Mar 31, 2020 9:58 am
Forum: This is SolarChat !!
Topic: Limb edge in CaK
Replies: 9
Views: 3808

Re: Limb edge in CaK

Mark,
Your eyesight must be much better than mine.....
I can’t see a “double edge”.....
by Merlin66
Tue Mar 31, 2020 3:49 am
Forum: This is SolarChat !!
Topic: Limb edge in CaK
Replies: 9
Views: 3808

Limb edge in CaK

Just a question.... We know in H alpha depending on the bandwidth, we can pick up the spiculation layer at the solar edge, and when using a wider bandwidth (with a single stack etalon) we get the "double edge" where the background Photosphere shows.... Why don't we see a similar effect when working ...
by Merlin66
Mon Mar 30, 2020 9:38 pm
Forum: Solar Scope Modifications
Topic: Coronado PST Etalon tuning anti-slip bearing modification
Replies: 18
Views: 4563

Re: Coronado PST Etalon tuning anti-slip bearing modification

OK guys...here's the definitive answer on how the PST etalon is actually tuned! After almost 15 years of guessing/ discussion/ debate etc. I managed to get a reply from my contact who has worked with assembly and testing of the PST in production.... I asked the question: The options I think are: 1. ...