Search found 359 matches

by krakatoa1883
Mon Feb 11, 2019 10:50 am
Forum: This is SolarChat !!
Topic: Feb 10th - A Bit of an experiment!
Replies: 7
Views: 90

Re: Feb 10th - A Bit of an experiment!

That scope is no good for CaK at full aperture, it is too much aberrated at short wavelengths. Stop it down to 40-50 mm, you should note a marked improvement in definition.
by krakatoa1883
Fri Feb 08, 2019 5:14 pm
Forum: This is SolarChat !!
Topic: Big Bright Proms & Plage | 150mm HA | Feb 8th 2019
Replies: 16
Views: 185

Re: Big Bright Proms & Plage | 150mm HA | Feb 8th 2019

Nice images, Marty, detailed and well processed
by krakatoa1883
Tue Feb 05, 2019 12:12 pm
Forum: This is SolarChat !!
Topic: New Year, New Setup & the Blocking Filter Experiment - 3rd February
Replies: 22
Views: 437

Re: New Year, New Setup & the Blocking Filter Experiment - 3rd February

Great and even images, Mark, and interesting experience too. Thanks for sharing.
by krakatoa1883
Tue Feb 05, 2019 11:45 am
Forum: This is SolarChat !!
Topic: Full Disk 2/2/19
Replies: 8
Views: 168

Re: Full Disk 2/2/19

Wonderful sketch, very nice !
by krakatoa1883
Sun Jan 27, 2019 4:00 pm
Forum: This is SolarChat !!
Topic: Calcium Sun 27th Jan '19
Replies: 14
Views: 292

Re: Calcium Sun 27th Jan '19

Great images, Stu, the FD is superb!
by krakatoa1883
Sun Jan 27, 2019 3:55 pm
Forum: This is SolarChat !!
Topic: SUN (20190126) | FD images
Replies: 15
Views: 265

Re: SUN (20190126) | FD images

Nice images, Pedro, AR12733 has grown considerably in these last few days.
by krakatoa1883
Wed Jan 23, 2019 8:04 pm
Forum: This is SolarChat !!
Topic: AR12733 - 23rd Jan
Replies: 11
Views: 225

Re: AR12738 - 23rd Jan

Nice images, David.
by krakatoa1883
Wed Jan 23, 2019 7:56 pm
Forum: This is SolarChat !!
Topic: My first images of 2019
Replies: 9
Views: 202

Re: My first images of 2019

Thank you all, I'm glad you liked the images :)
by krakatoa1883
Wed Jan 23, 2019 10:02 am
Forum: This is SolarChat !!
Topic: My first images of 2019
Replies: 9
Views: 202

Re: My first images of 2019

Thanks to you all. I have been very pleased to note that the ES 3x behaves in about the same way as my Powermate 2.5x do, it provides a quite large sweet spot in my Quark which means it is almost telecentric and is very fine in Ca light.
by krakatoa1883
Tue Jan 22, 2019 8:10 pm
Forum: This is SolarChat !!
Topic: My first images of 2019
Replies: 9
Views: 202

My first images of 2019

The sky has been clear for several weeks during December and January but high northern winds due to a low pressure area stably placed on east Europe made the seeing always terrible and I had no opportunities to obtain any decent image. Last Sunday I couldn't resist to try my new Andover G band filte...
by krakatoa1883
Tue Jan 01, 2019 5:09 pm
Forum: This is SolarChat !!
Topic: 1st Jan Sun in CaK
Replies: 17
Views: 445

Re: 1st Jan Sun in CaK

Very good images Stu. Have you used the 125mm at full aperture ? It seems well corrected in CaK....
by krakatoa1883
Tue Dec 11, 2018 8:06 pm
Forum: Commercial Solar Filters/Cameras/Hardware
Topic: Herschel Wedge with 152mm 1200 TMB refractor?
Replies: 5
Views: 393

Re: Herschel Wedge with 152mm 1200 TMB refractor?

I normally use a Baader CC with my 150 mm f/5 refractor without problems. Inside the wedge there are ND3.0 + ND06 filters. Someone adds a UV/IR cut before or after the wedge, I am not sure it is necessary.
by krakatoa1883
Tue Dec 11, 2018 7:59 pm
Forum: This is SolarChat !!
Topic: Prominences 11.12.2018
Replies: 11
Views: 501

Re: Prominences 11.12.2018

Fantastic images! Which instrument have you used for the comet ?
by krakatoa1883
Tue Dec 11, 2018 12:34 pm
Forum: This is SolarChat !!
Topic: Another Quark Question
Replies: 9
Views: 543

Re: Another Quark Question

As far as contrast and definition are concerned, yes, with an external amplifier my Quark works better than in the original configuration, not a huge difference but is there, in particular if an external or internal ERF is placed in front of the device. Actually this is the reason that lead me to re...
by krakatoa1883
Mon Dec 10, 2018 8:23 am
Forum: This is SolarChat !!
Topic: November 9th
Replies: 8
Views: 321

Re: November 9th

Great images Brian. I see some horizontal lines crossing the discs is WL and CaK... or is it my monitor ?
by krakatoa1883
Mon Dec 10, 2018 8:20 am
Forum: This is SolarChat !!
Topic: Sunday 9th December 2018
Replies: 15
Views: 574

Re: Sunday 9th December 2018

Very, very beautiful discs Alexandra. I understand that you images are with N up and E left ?
by krakatoa1883
Sun Dec 09, 2018 8:11 pm
Forum: This is SolarChat !!
Topic: Another Quark Question
Replies: 9
Views: 543

Re: Another Quark Question

I'm not sure you can unscrew the telecentric on the later batch quarks? the telecentric is mounted in an inner black barrel that can't be removed from the device body without making the Quark unusable, however each lens group can be removed separately leaving the body as it is. The BF shall of cour...
by krakatoa1883
Fri Dec 07, 2018 5:43 pm
Forum: This is SolarChat !!
Topic: Sunspot in AR2729 still there! HA | Dec 6th 2018
Replies: 9
Views: 354

Re: Sunspot in AR2729 still there! HA | Dec 6th 2018

Great images Marty, the group is still there, I counted 14 small spots this morning.
by krakatoa1883
Wed Dec 05, 2018 8:20 pm
Forum: This is SolarChat !!
Topic: Another Quark Question
Replies: 9
Views: 543

Re: Another Quark Question

Hi Brian the telecentric is composed by two doublets, the large converging one can be removed by separating the red and the black barrels of the Quark. It is placed in the black barrel and can be easily taken out by unscrewing its retaining ring (NB, opening the Quark will void the warranty). For re...
by krakatoa1883
Thu Nov 22, 2018 6:16 pm
Forum: This is SolarChat !!
Topic: Citizen Science
Replies: 24
Views: 1306

Re: Citizen Science

It's great, Stu, a fantastic opportunity. I don't have particularly good images for contributing but I am sure you'll collect many fine pictures for your presentation from our most skilled forum members. Thanks for sharing with us.
by krakatoa1883
Wed Nov 21, 2018 11:58 am
Forum: This is SolarChat !!
Topic: Sol from the 20th of November 2018.
Replies: 8
Views: 403

Re: Sol from the 20th of November 2018.

Great captures, Eric. Is that one your average daytime seeing or is it generally better/worse ?
by krakatoa1883
Sun Nov 18, 2018 12:31 pm
Forum: This is SolarChat !!
Topic: Today's SUN (20181116) with good seeing
Replies: 14
Views: 596

Re: Today's SUN (20181116) with good seeing

Excellent images, Pedro, thanks for detailing the flat field procedure, very useful.
by krakatoa1883
Sun Nov 18, 2018 12:27 pm
Forum: This is SolarChat !!
Topic: Still orbiting around the Sun....
Replies: 8
Views: 373

Re: Still orbiting around the Sun....

Thanks to all for your comments, very kind :)

The group is still there, both the trailing and following spots are slightly larger than yesterday, look at it if you can.
by krakatoa1883
Sat Nov 17, 2018 3:12 pm
Forum: This is SolarChat !!
Topic: Still orbiting around the Sun....
Replies: 8
Views: 373

Still orbiting around the Sun....

Today first clear and sunny day since October 20th. Of course the seeing is terrible as the atmospheric circulation changed from a humid and cloudy African anticyclone to a dry Russian cyclone together with an abrupt temperature fall. No high resolution possible however I did my best to capture a fu...