Search found 550 matches

by bart1805
Thu Jun 06, 2019 3:47 pm
Forum: Solar Scope Modifications
Topic: Relation between BF size and the PST Sweet Spot
Replies: 8
Views: 133

Re: Relation between BF size and the PST Sweet Spot

Don't know what you mean exactly. The sweet spot is about the size of the sun in a 400mm telescope. So if your focal length is longer, the sweet spot is smaller than the whole sun.
by bart1805
Thu Jun 06, 2019 3:28 pm
Forum: This is SolarChat !!
Topic: Quick AR - cloud dodging 06/06/2019 Tal/PST mod
Replies: 7
Views: 137

Re: Quick AR - cloud dodging 06/06/2019 Tal/PST mod

Nice David! someone on another forum made the connection with history: on D-Day there should be other features to make the word complete. CTORY is missing.
What is wrong with the processing? To dark?
by bart1805
Thu Jun 06, 2019 2:53 pm
Forum: Solar Scope Modifications
Topic: Relation between BF size and the PST Sweet Spot
Replies: 8
Views: 133

Re: Relation between BF size and the PST Sweet Spot

Nothing will change in my opinion. Sweet spot is caused by the etalon, not by the BF.
by bart1805
Thu Jun 06, 2019 1:30 pm
Forum: This is SolarChat !!
Topic: Calcium with 6 "f8 and Ha
Replies: 19
Views: 273

Re: Calcium with 6 "f8 and Ha

Absolutely stunning! And glad to see some new images taken by you. What kind of 6 inch apo are you using?
by bart1805
Tue Jun 04, 2019 5:23 am
Forum: This is SolarChat !!
Topic: Intes 703 for H-alpha, some experiments
Replies: 17
Views: 316

Re: Intes 703 for H-alpha, some experiments

Thanks Brian, Franco and Pedro. And thanks for the SPOD!
by bart1805
Mon Jun 03, 2019 5:50 pm
Forum: This is SolarChat !!
Topic: Intes 703 for H-alpha, some experiments
Replies: 17
Views: 316

Re: Intes 703 for H-alpha, some experiments

Thanks all!
I agree Franco, this could be the end of the 150mm Skywatcher as my H-alpha telescope.
Ronnie, hard to judge if it is a good etalon. I have two, this one seems a bit better than the other one. But the difference is not extreme.
by bart1805
Mon Jun 03, 2019 5:50 pm
Forum: SPoD Archive
Topic: Intes 703 for H-alpha, some experiments
Replies: 8
Views: 111

Re: Intes 703 for H-alpha, some experiments

Thanks all!
I agree Franco, this could be the end of the 150mm Skywatcher as my H-alpha telescope.
Ronnie, hard to judge if it is a good etalon. I have two, this one seems a bit better than the other one. But the difference is not extreme.
by bart1805
Mon Jun 03, 2019 9:16 am
Forum: This is SolarChat !!
Topic: Intes 703 for H-alpha, some experiments
Replies: 17
Views: 316

Re: Intes 703 for H-alpha, some experiments

marktownley wrote:
Mon Jun 03, 2019 5:47 am
These are great shots Bart! Looks like the Intes is a good scope.
Thanks Mark! And yes, even with the huge central obstruction the quality seems better than with the 150mm SW.
by bart1805
Mon Jun 03, 2019 9:16 am
Forum: SPoD Archive
Topic: Intes 703 for H-alpha, some experiments
Replies: 8
Views: 111

Re: Intes 703 for H-alpha, some experiments

marktownley wrote:
Mon Jun 03, 2019 5:47 am
These are great shots Bart! Looks like the Intes is a good scope.
Thanks Mark! And yes, even with the huge central obstruction the quality seems better than with the 150mm SW.
by bart1805
Sun Jun 02, 2019 10:00 pm
Forum: This is SolarChat !!
Topic: Intes 703 for H-alpha, some experiments
Replies: 17
Views: 316

Intes 703 for H-alpha, some experiments

Quite some experiments last days. This weekend I tried the Intes M703 for H-alpha. Way much easier to transport into the garden than the long 150mm Skywatcher achromat. The imaging train is way less heavy and the optical quality seems better than that of the 150mm f/8 SW. Here is how it looks. Made ...
by bart1805
Sun Jun 02, 2019 10:00 pm
Forum: SPoD Archive
Topic: Intes 703 for H-alpha, some experiments
Replies: 8
Views: 111

Intes 703 for H-alpha, some experiments

Quite some experiments last days. This weekend I tried the Intes M703 for H-alpha. Way much easier to transport into the garden than the long 150mm Skywatcher achromat. The imaging train is way less heavy and the optical quality seems better than that of the 150mm f/8 SW. Here is how it looks. Made ...
by bart1805
Wed May 22, 2019 8:31 pm
Forum: Solar Scope Modifications
Topic: 150 mm Solar Newton
Replies: 50
Views: 1652

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: 1652

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: 1652

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: 1652

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: 210

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: 249

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: 201

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: 295

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: 342

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: 296

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: 180

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: 239

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: 336

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: 214

Re: Sunday Sunshine 12th May

Nice session Mark! Beautiful CaK, was the close up version also with 60mm?