Search found 539 matches

by bart1805
Wed May 22, 2019 8:31 pm
Forum: Solar Scope Modifications
Topic: 150 mm Solar Newton
Replies: 50
Views: 1431

Re: 150 mm Solar Newton

Hello Bart, I like your filter support system :-) I have made no progress on my side since I was busy on other things. I've got to get into this in June. BTW, did you observe any temperature issue with the filter ? Best regards Christian Hi Christian, No heat issues at all at the moment. But it is ...
by bart1805
Wed May 22, 2019 10:38 am
Forum: Solar Scope Modifications
Topic: 150 mm Solar Newton
Replies: 50
Views: 1431

Re: 150 mm Solar Newton

Yes, with a Quark CaH it is possible. It is less narrow than a Lunt CaK module or a PST#1 filter.
Brian: MCM can apply coatings to a mirror so it reflects just H-alpha and CaK.
by bart1805
Tue May 21, 2019 8:33 pm
Forum: Solar Scope Modifications
Topic: 150 mm Solar Newton
Replies: 50
Views: 1431

Re: 150 mm Solar Newton

Hah, that works Bart! Are you doing that as an alternative to dealuminizing the primary? Very best, Hi Marty, yes that is correct. Exposure time has to be shorter than I am able to reach wit the de-aluminised version. Christian calculated that this would be the case, but off course I had to try it ...
by bart1805
Tue May 21, 2019 7:28 pm
Forum: Solar Scope Modifications
Topic: 150 mm Solar Newton
Replies: 50
Views: 1431

Re: 150 mm Solar Newton

Was looking for a aluminised 150mm f/8 mirror but found for very little money another complete Skywatcher 150mm f/8. The light blue tube. The very good news is that it has a retrofit GSO 2 inch 1:10 focuser. The bad news is that the cell of the primary can't be collimated really easy. So in the cate...
by bart1805
Sun May 19, 2019 10:06 pm
Forum: This is SolarChat !!
Topic: Today's SUN (20190519) | PROMS
Replies: 12
Views: 129

Re: Today's SUN (20190519) | PROMS

Nice ones Pedro, beautiful proms!
by bart1805
Sun May 19, 2019 10:05 pm
Forum: Commercial Solar Filters/Cameras/Hardware
Topic: Thinking about a mount upgrade - questions
Replies: 6
Views: 188

Re: Thinking about a mount upgrade - questions

Hi Franco, as mentioned earlier I was doing the same a couple of months ago. For me there were two things on top of the list: - The payload, the 9 inch Rumak is really heavy. - The weight of the mount itself, I have to build everything up and down in the garden and can't really use a dolly. I switch...
by bart1805
Thu May 16, 2019 9:06 pm
Forum: This is SolarChat !!
Topic: Wednesday 15th WL & Ca-K
Replies: 8
Views: 113

Re: Wednesday 15th WL & Ca-K

Nice one David! The close up version in CaK looks like a flower to me.
https://www.warentuin.nl/media/product/ ... jk-e86.jpg
by bart1805
Wed May 15, 2019 10:08 pm
Forum: This is SolarChat !!
Topic: May 15 H alpha and May 10 CaK
Replies: 11
Views: 201

Re: May 15 H alpha and May 10 CaK

Really beautiful images Peter! What is your exposure time in CaK?
by bart1805
Wed May 15, 2019 8:28 am
Forum: This is SolarChat !!
Topic: AR2741 with 250mm RCT
Replies: 14
Views: 249

Re: AR2741 with 250mm RCT

Yeah! The monster is alive!
Good luck Stu, hope for a lot of good seeing.
by bart1805
Tue May 14, 2019 8:38 pm
Forum: This is SolarChat !!
Topic: AR2741 HR & Wide Field, Full Disc | WL, HA, CaK | May 11th 2018
Replies: 14
Views: 199

Re: AR2741 HR & Wide Field, Full Disc | WL, HA, CaK | May 11th 2018

You mean something like this Marty?
viewtopic.php?f=11&t=25081&p=225276&hil ... st#p225276

Good luck with the testing. Curious how well it operates in CaK. Should be better than the C8.
by bart1805
Sun May 12, 2019 10:00 pm
Forum: This is SolarChat !!
Topic: AR2740 in white light, 12052019
Replies: 8
Views: 119

Re: AR2740 in white light, 12052019

Thanks guys! I really like the Rumak. Curious how good it functions when the seeing cooperates and I will be able to image at shorter wavelengths.
by bart1805
Sun May 12, 2019 9:59 pm
Forum: This is SolarChat !!
Topic: May 10: AR2740 / 2741 in H alpha
Replies: 12
Views: 163

Re: May 10: AR2740 / 2741 in H alpha

Spectacular images Peter! And I also like the way you processed them.
by bart1805
Sun May 12, 2019 9:57 pm
Forum: This is SolarChat !!
Topic: Today's SUN (20190511) | QUARK first light
Replies: 13
Views: 264

Re: Today's SUN (20190511) | QUARK first light

Congratulations Pedro!
by bart1805
Sun May 12, 2019 9:55 pm
Forum: This is SolarChat !!
Topic: Sunday Sunshine 12th May
Replies: 13
Views: 143

Re: Sunday Sunshine 12th May

Nice session Mark! Beautiful CaK, was the close up version also with 60mm?
by bart1805
Sun May 12, 2019 9:53 pm
Forum: This is SolarChat !!
Topic: AR2741 HR & Wide Field, Full Disc | WL, HA, CaK | May 11th 2018
Replies: 14
Views: 199

Re: AR2741 HR & Wide Field, Full Disc | WL, HA, CaK | May 11th 2018

Well, I must say that you give the definition of "aperture fever" a whole new meaning. (-; Interesting approach, a battle between a normal Newton with a D-Erf and a Newton with a special coating like The T250 Solar Newton presented here. The coatings were done by MCM Optique in France. The coated Ne...
by bart1805
Sun May 12, 2019 4:16 pm
Forum: This is SolarChat !!
Topic: AR2740 in white light, 12052019
Replies: 8
Views: 119

AR2740 in white light, 12052019

Just managed to take one AVI this morning, seeing was quite terrible. But a nice spot! Baader Astrosolar ND3.8 _ Rumak 9 inch f/13,5 _ Astronomik Red Filter _ ASI290MM Thanks for watching! Bart. https://live.staticflickr.com/65535/32889618627_7dc9273ca3_c.jpg Sun_094859_120519_Gain=12(off)_Expo...
by bart1805
Sun May 12, 2019 3:32 pm
Forum: This is SolarChat !!
Topic: AR2740 and 2741 in CaK, 09052019
Replies: 11
Views: 205

Re: AR2740 and 2741 in CaK, 09052019

christian viladrich wrote:
Sat May 11, 2019 9:17 am
So did you find a significant improvement ?
Hard to say if it really makes the images better. Seeing is everything.....
But it seems a bit easier to focus: it snaps more in and out of focus, so that is good news.
by bart1805
Fri May 10, 2019 9:55 pm
Forum: This is SolarChat !!
Topic: AR2740 and 2741 in CaK, 09052019
Replies: 11
Views: 205

Re: AR2740 and 2741 in CaK, 09052019

christian viladrich wrote:
Fri May 10, 2019 8:33 pm
Well done Bart !
Is it with the change of distance between the lenses ?
Thanks Christian. Yes, it was the second session after I doubled the distance between the lenses. Here is the first one:
viewtopic.php?f=4&t=26041
by bart1805
Fri May 10, 2019 11:50 am
Forum: This is SolarChat !!
Topic: Solar Images taken May 9th 2019 and a question.
Replies: 9
Views: 180

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

Can't tell you that. I suppose it is a ND5.0 filter made out of glass? Then your exposure time would be substantially longer. So more effect of the seeing.
Normally only quite expensive glass filters can compete with the advantages of Astrosolar.
by bart1805
Fri May 10, 2019 11:05 am
Forum: This is SolarChat !!
Topic: Solar Images taken May 9th 2019 and a question.
Replies: 9
Views: 180

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

Hi Martin,
Yes, you would get better results: bigger aperture.
You would need the Baader ND3.8 Astrosolar. This is just for imaging, not visual.
You can buy a complete filter or a sheet of Astrosolar. Then you would have to make your own holder.
BTW: nice images, that 2741 is a real beauty.
CS! Bart.
by bart1805
Fri May 10, 2019 7:03 am
Forum: This is SolarChat !!
Topic: AR2740 on May 4th
Replies: 19
Views: 295

Re: AR2740 on May 4th

Hi Franco, Sync to target is useful when your slew to target is a bit off. So imagine you want to look at M31. Your mount is in the zero position, polar alignment is as good as you can get it. You let the telescope slew to M31. But you are a bit off. So you have to slew manually to M31. When it is i...
by bart1805
Thu May 09, 2019 9:25 pm
Forum: This is SolarChat !!
Topic: Animation: Cinco de Mayo Fireworks
Replies: 14
Views: 209

Re: Animation: Cinco de Mayo Fireworks

Absolutely beautiful!
And I agree with Alexandra about that beautiful phenomenon.
But please: blow those tiny dust speckles away. (-;
One question. What did you use as the trigger and (I forgot the name of the other) value? Were you not afraid that there could be big gaps between the different avi's?
by bart1805
Thu May 09, 2019 8:39 pm
Forum: This is SolarChat !!
Topic: May 7: H alpha and CaK
Replies: 11
Views: 203

Re: May 7: H alpha and CaK

Great images!
by bart1805
Thu May 09, 2019 8:38 pm
Forum: This is SolarChat !!
Topic: AR2740 on May 4th
Replies: 19
Views: 295

Re: AR2740 on May 4th

Hi Bart: I like it ! You can also use it as a finder with large scopes, as it makes finding the sun very easy. It tracks the sun very well, I think it made a difference for me in many images. Now I am thinking of upgrading the mount. Franco Thanks Franco! Finding the sun is not a problem, but becau...
by bart1805
Thu May 09, 2019 8:34 pm
Forum: This is SolarChat !!
Topic: Quick session this morning May 7th
Replies: 23
Views: 349

Re: Quick session this morning May 7th

I reacted on this post in the SPOD section, not the right place of course.
Franco: congratulations, great images! And as I said: there are no better reasons to be late at work than these four.