Search found 488 matches

by krakatoa1883
Sun Aug 11, 2019 1:14 pm
Forum: Commercial Solar Filters/Cameras/Hardware
Topic: it seems that my Quark is not reaching the working temperature
Replies: 13
Views: 307

Re: it seems that my Quark is not reaching the working temperature

Getting f/30 by reducing the aperture will produce a faint image unless observed at the lowest possible magnification. Instead try to increase the f.l. with a good amplifier, there is no image degradation, I did it many times with my Quark and it works fine. Changing your yellow ERF with a D-ERF cou...
by krakatoa1883
Tue Aug 06, 2019 8:51 pm
Forum: Commercial Solar Filters/Cameras/Hardware
Topic: it seems that my Quark is not reaching the working temperature
Replies: 13
Views: 307

Re: it seems that my Quark is not reaching the working temperature

Quark's etalon needs a f/30 light cone to work properly, better around f/40, so increasing the f/ratio (possibly without reducing aperture) should produce better results. Try different setups and see which one works best.
by krakatoa1883
Tue Aug 06, 2019 3:16 pm
Forum: Commercial Solar Filters/Cameras/Hardware
Topic: it seems that my Quark is not reaching the working temperature
Replies: 13
Views: 307

Re: it seems that my Quark is not reaching the working temperature

Hi Roman If your Quark is exposed to sunlight while observing it may become too hot for tuning. For example my one needs only a modest heat input and works best at -5 position. Under the Sun it reaches tuning without any power supply and if connected to the mains the light remains orange. Try shield...
by krakatoa1883
Thu Aug 01, 2019 2:08 pm
Forum: This is SolarChat !!
Topic: Solar Sunday
Replies: 22
Views: 351

Re: Solar Sunday

Superb CaK detail, Alexandra, did you take it at full aperture ?
by krakatoa1883
Wed Jul 17, 2019 4:43 pm
Forum: This is SolarChat !!
Topic: AR12403 (20140819/20140829) | Pedro RE'
Replies: 11
Views: 208

Re: AR12403 (20140819/20140829) | Pedro RE'

Excellent images, very well processed.
by krakatoa1883
Tue Jul 16, 2019 11:47 am
Forum: This is SolarChat !!
Topic: Solar Images taken May 9th 2019 and a question.
Replies: 14
Views: 547

Re: Solar Images taken May 9th 2019 and a question.

Good result, granulation is evident. With a 0.5x focal reducer you can image the full disc.
by krakatoa1883
Mon Jul 15, 2019 4:44 pm
Forum: Commercial Solar Filters/Cameras/Hardware
Topic: Why my Quark always refused to work...
Replies: 20
Views: 1215

Re: Why my Quark always refused to work...

Replacing the BF may help however incorrect tuning and poor seeing may also lead to obtain ill-defined images. Hope your new BF will improve things.
by krakatoa1883
Mon Jul 15, 2019 1:19 pm
Forum: This is SolarChat !!
Topic: My first CaK image
Replies: 8
Views: 180

Re: My first CaK image

Thanks Alexandra, very kind :)
by krakatoa1883
Mon Jul 15, 2019 8:28 am
Forum: This is SolarChat !!
Topic: My first CaK image
Replies: 8
Views: 180

Re: My first CaK image

Thanks to all, this CaK device is indeed definitively more funny than my calcium Quark :D I noted that the filter is recommended up to 100mm aperture, I suppose an ERF is required for larger refractors but the 2" tube end has no thread for my blue CCD filter, is there any way to make an adaptation ?
by krakatoa1883
Sun Jul 14, 2019 4:43 pm
Forum: This is SolarChat !!
Topic: My first CaK image
Replies: 8
Views: 180

My first CaK image

Having used a Quark calcium for two years I eventually decided to try some CaK imaging. From the European Lunt dealer I found a good offer for a straight-through B600, which I preferred to the diagonal version as it has a shorter optical path (I have also a H-alpha BF1200 ST and indeed it is more ve...
by krakatoa1883
Sun Jul 14, 2019 3:55 pm
Forum: This is SolarChat !!
Topic: Today's SUN (20190713) | FDs (3 lights)
Replies: 10
Views: 223

Re: Today's SUN (20190713) | FDs (3 lights)

Beautiful discs, Pedro, very sharp.
by krakatoa1883
Sun Jul 14, 2019 3:51 pm
Forum: This is SolarChat !!
Topic: July 7th Images
Replies: 14
Views: 277

Re: July 7th Images

Nice images, Brian, I liked H-alpha in particular. WL and CaK appear quite dark on my screen, they could be improved by using of curves tool or a high pass filter. I tried to do so but some artifacts emerged at the top limb of the full disc. At full resolution CaK is impressive, very well resolved.
by krakatoa1883
Wed Jul 10, 2019 10:31 am
Forum: This is SolarChat !!
Topic: Sunday Sun 7th July '19_Cycle 25
Replies: 12
Views: 362

Re: Sunday Sun 7th July '19_Cycle 25

Your CaK discs are really super, Stu, very effective setup for this wavelength.
by krakatoa1883
Wed Jul 10, 2019 10:30 am
Forum: This is SolarChat !!
Topic: Full disc July 6
Replies: 9
Views: 260

Re: Full disc July 6

Thanks Alexandra, Stu.
by krakatoa1883
Mon Jul 08, 2019 9:56 am
Forum: This is SolarChat !!
Topic: Replacement Quark ERF
Replies: 4
Views: 177

Re: Replacement Quark ERF

Actually it does both jobs, cuts etalon harmonics and protects the etalon from excessive heat. Unfortunately this kind of filters are not designed specifically for solar observing and shall therefore be protected by using of some energy rejection device placed in front of them. Based on what occurre...
by krakatoa1883
Sun Jul 07, 2019 7:27 pm
Forum: This is SolarChat !!
Topic: Replacement Quark ERF
Replies: 4
Views: 177

Re: Replacement Quark ERF

You mean the blocking filter, I see. You have to replace it, there is no other solution. Mine too degraded, I bought a new one from Andover.
by krakatoa1883
Sun Jul 07, 2019 7:22 pm
Forum: This is SolarChat !!
Topic: Fridays Calcium Images - 5th July
Replies: 13
Views: 339

Re: Fridays Calcium Images - 5th July

Great images, and explanations, Mark. Is the full disc a mosaic ?
by krakatoa1883
Sun Jul 07, 2019 7:11 pm
Forum: This is SolarChat !!
Topic: Full disc July 6
Replies: 9
Views: 260

Re: Full disc July 6

Thanks to all, very much appreciated :)
by krakatoa1883
Sat Jul 06, 2019 7:56 pm
Forum: This is SolarChat !!
Topic: Full disc July 6
Replies: 9
Views: 260

Full disc July 6

Not much stuff to see today, a couple of filaments and some minor proms, the most interesting on the NE limb. I have taken only a full disc with my Lunt LS50 and B1200. However based on SDO imagery a high southern latitude active region is now visible to the east, it's small but looks promising. Som...
by krakatoa1883
Fri Jun 28, 2019 7:12 pm
Forum: Commercial Solar Filters/Cameras/Hardware
Topic: Why my Quark always refused to work...
Replies: 20
Views: 1215

Re: Why my Quark always refused to work...

Finally the new BF from Andover arrived and indeed it made a huge difference, so my Quark is now returned as new. I am very happy because the etalon of my unit is good and very uniform and a degraded BF made it almost useless. The replacement BF also totally cured the problems I had with front ERFs ...
by krakatoa1883
Fri Jun 28, 2019 6:31 pm
Forum: This is SolarChat !!
Topic: Sun 28th June
Replies: 14
Views: 314

Re: Sun 28th June

CaK discs and prom are absolutely fantastic. May you remind me of your setup for the last two images ?
by krakatoa1883
Fri Jun 28, 2019 6:29 pm
Forum: This is SolarChat !!
Topic: All things nice
Replies: 22
Views: 485

Re: All things nice

Fantastic animaton Alexandra. NLC appeared as far as south as northern Italy this year but I did not take pictures.
by krakatoa1883
Wed May 22, 2019 10:33 am
Forum: This is SolarChat !!
Topic: Blank! Nothing to See Here... 21st may
Replies: 9
Views: 343

Re: Blank! Nothing to See Here... 21st may

Superb CaK images, Mark, at full res they are really impressive
by krakatoa1883
Wed May 22, 2019 8:48 am
Forum: Solar Scope Modifications
Topic: 150 mm Solar Newton
Replies: 50
Views: 2243

Re: 150 mm Solar Newton

Hi Brian no, based on my experience there is no enough light for imaging in H alpha with a deluminized mirror. However the field is not completely dark, at least with my Quark, may be something can be done at low resolution but in my opinion is not worth the effort. I have no experience with Lunt Ca...