Search found 191 matches

by bart1805
Tue Jun 05, 2018 10:56 pm
Forum: This is SolarChat !!
Topic: one of those "other" things
Replies: 2
Views: 185

Re: one of those "other" things

What did you burn this time?
by bart1805
Thu May 31, 2018 5:06 pm
Forum: Solar Scope Modifications
Topic: Front ERF vs Internal ERF? Minimum size?
Replies: 27
Views: 1074

Re: Front ERF vs Internal ERF? Minimum size?

Hi Marty,
I thought the erf should be about 2/3 of the front lens. But please wait for others to react before you act on this advice. (-;
Or try to find a second hand Erf and put it before the lens.
Bart.
by bart1805
Thu May 31, 2018 7:43 am
Forum: This is SolarChat !!
Topic: Herschel wedge option
Replies: 10
Views: 419

Re: Herschel wedge option

Hi StarCitizen,
You would need two different Baader Films. ND5.0 for visual and ND3.8 for imaging. I find it difficult to say if the results for Baader Film and the wedge are the same. To me it seems the Herschel Wedge works better. But maybe there are other opinions on this forum.
Bart.
by bart1805
Wed May 30, 2018 10:16 pm
Forum: This is SolarChat !!
Topic: Herschel wedge option
Replies: 10
Views: 419

Re: Herschel wedge option

Heat is no problem, just used it to image, but with the right eyepiece you should be able to see the whole disk I think.
I use the ND3.0 filter, a Baader SC and a UV/IR block filter. Just search the forum with the term Lacerta and you will find quite a lot of examples.
by bart1805
Wed May 30, 2018 9:20 pm
Forum: This is SolarChat !!
Topic: Herschel wedge option
Replies: 10
Views: 419

Re: Herschel wedge option

I use this one with a 150mm f8 refractor. Works perfectly!
https://teleskop-austria.at/Herschel-LA ... 0mm-Prisma
Does not seem to be affected by how long you use it.
by bart1805
Wed May 30, 2018 3:00 pm
Forum: Solar Scope Modifications
Topic: WILL IT BURN? - ..Filter Killer..
Replies: 35
Views: 1000

Re: WILL IT BURN? - ..Filter Killer..

If a filter fully blocks UV and IR does this filter reduce the thermal load? The answer is yes.
So, is there less thermal load than when you do not use this filter? The answer is yes.
Is there no thermal load at all when you use a filter that fully blocks UV and IR? The answer is no.
by bart1805
Wed May 30, 2018 7:06 am
Forum: Solar Scope Modifications
Topic: WILL IT BURN? - ..Filter Killer..
Replies: 35
Views: 1000

Re: WILL IT BURN? - ..Filter Killer..

Look at 1200nm... So this just confirms everything, they already know their system passes a ton of heat. Yep, that is my point. What you "discovered" you can find easily on their website. Combined with what spectraljoe wrote the question for me is did you really believe that a UV/IR blocking filter...
by bart1805
Tue May 29, 2018 11:17 pm
Forum: Solar Scope Modifications
Topic: WILL IT BURN? - ..Filter Killer..
Replies: 35
Views: 1000

Re: WILL IT BURN? - ..Filter Killer..

Baader UV/IR blocking filters open at 1100 nm.
https://www.baader-planetarium.com/en/d ... filter.pdf
Did you prove that they open up before 1100 nm?
by bart1805
Tue May 29, 2018 9:49 pm
Forum: Solar Scope Modifications
Topic: WILL IT BURN? - ..Filter Killer..
Replies: 35
Views: 1000

Re: WILL IT BURN? - ..Filter Killer..

I am sorry, but don't fully understand what you are trying to prove. You say for example that "Beloptik KG3 IR/UV cut filter is effectively useless on its own for solar imaging". Ok, but is that news? Where does Beloptik say that this filter can be used "on its own for solar imaging". As far as I un...
by bart1805
Thu May 17, 2018 5:32 pm
Forum: Commercial Solar Filters/Cameras/Hardware
Topic: Newton Rings and CCD Fringing
Replies: 4
Views: 499

Re: Newton Rings and CCD Fringing

Dmk41 mono and PGR Grasshopper IMX174 mono. No Newton rings when used in primary focus. But with 2,5x Powermate both camera's show them really, really well....

Solution: 2 degrees wedge prism. And presto: no Newton rings at all.
by bart1805
Fri May 11, 2018 1:44 pm
Forum: Commercial Solar Filters/Cameras/Hardware
Topic: Baader Triband SCT
Replies: 19
Views: 1023

Re: Baader Triband SCT

fjabet wrote:
Fri May 11, 2018 12:26 pm
BTW, Baader are stad SCT, not edge HD
Thanks for clearing that up, my mistake. Thought I had read somewhere they used the Edge.
by bart1805
Tue May 08, 2018 9:47 pm
Forum: Commercial Solar Filters/Cameras/Hardware
Topic: Baader Triband SCT
Replies: 19
Views: 1023

Re: Baader Triband SCT

Skyburner, I am a bit confused. I know the price of a 160 mm Baader Erf because I payed for one: 995 euro without a cell. But the filter you describe is 48mm, with a price of 800 dollar. And it is 3.250 euro for a 8 inch Celestron Edge HD telescope with a Triband-ERF-coated Schmidt corrector plate. ...
by bart1805
Sun May 06, 2018 5:38 pm
Forum: Commercial Solar Filters/Cameras/Hardware
Topic: Baader Triband SCT
Replies: 19
Views: 1023

Baader Triband SCT

Baader announced the prices of their Triband SCT's yesterday.
3.275 euro's for the 8 inch version.
Clear skies, Bart.

https://www.baader-planetarium.com/en/t ... p-sky.html
by bart1805
Sun May 06, 2018 3:56 pm
Forum: This is SolarChat !!
Topic: Does a reducer work to achieve F10?
Replies: 20
Views: 912

Re: Does a reducer work to achieve F10?

Hi all, Yes, it works! Really bad seeing, but I could get fairly easily in focus. The set up. https://farm1.staticflickr.com/829/41212563454_6b9d4253ec_c.jpg 20180506_112342_resized by bart moors , on Flickr On the front the 160 mm D-Erf. I made an adaptor out of wood and an old dew cap. And can scr...
by bart1805
Thu May 03, 2018 8:43 pm
Forum: This is SolarChat !!
Topic: Does a reducer work to achieve F10?
Replies: 20
Views: 912

Re: Does a reducer work to achieve F10?

christian viladrich wrote:
Thu May 03, 2018 6:27 pm
Hope this helps.
Thanks Christian, yes it helps! And my luck that the love of my life studied French, so she has got some work to do. (-;
by bart1805
Thu May 03, 2018 7:37 am
Forum: This is SolarChat !!
Topic: Does a reducer work to achieve F10?
Replies: 20
Views: 912

Re: Does a reducer work to achieve F10?

@rodastro, greatattractor and astrograph.
Thanks! Hope to be able to test it on Sunday. Will let you know the results.
by bart1805
Wed May 02, 2018 8:18 am
Forum: This is SolarChat !!
Topic: Does a reducer work to achieve F10?
Replies: 20
Views: 912

Re: Does a reducer work to achieve F10?

I believe the f/10 beam from the Mak should be fine, but the real problem is having enough back-focus (~200 mm for PST). You'd need to check how far you can pull the focal plane out (plus there's the effect of changing effective f.l. when the distance of Mak's mirrors changes). Backfocus is huge. A...
by bart1805
Wed May 02, 2018 8:06 am
Forum: This is SolarChat !!
Topic: Does a reducer work to achieve F10?
Replies: 20
Views: 912

Re: Does a reducer work to achieve F10?

Merlin66 wrote:
Wed May 02, 2018 1:40 am
Bart,
The 703 is an f10 Mak, why do you think it will not provide an f10 beam to the PST etalon assembly?
Hi Merlin, is the secondary f10? Back to primary Maksutov school for me maybe... Thanks! Bart.
by bart1805
Tue May 01, 2018 9:46 pm
Forum: This is SolarChat !!
Topic: Does a reducer work to achieve F10?
Replies: 20
Views: 912

Re: Does a reducer work to achieve F10?

Thanks Mark, will see what happens.
by bart1805
Tue May 01, 2018 7:58 pm
Forum: This is SolarChat !!
Topic: Does a reducer work to achieve F10?
Replies: 20
Views: 912

Re: Does a reducer work to achieve F10?

Try it. Just need that reducer the correct distance infront of the PST collimating lens. A bit of trial and error should do it. Hi Mark, this time a question not about the SW Mak 180 but about the Intes 703. Just realised that I made a mistake in thinking I could just put the PST etalon behind the ...
by bart1805
Sat Apr 28, 2018 1:22 pm
Forum: This is SolarChat !!
Topic: AR2706 21 april
Replies: 24
Views: 895

Re: AR2706 21 april

Stay with 150mm refractor. 10mm aperture increase will not make a notable resolution increasing. Refractors give the best contrast. Only full aperture of 703 can deliver a bit better resolution. Thanks Valery, You are right about the resolution. But I will try it anyway. Really curious how the Alte...
by bart1805
Wed Apr 25, 2018 10:41 pm
Forum: This is SolarChat !!
Topic: April 23rd Session
Replies: 14
Views: 538

Re: April 23rd Session

Beautiful! You managed to do what I find the most difficult part of processing: achieve enough contrast and still have a lot of detail in the umbra.
by bart1805
Wed Apr 25, 2018 9:05 pm
Forum: Solar Scope Modifications
Topic: Can i use my EDGEHD800 for Ha?
Replies: 10
Views: 563

Re: Can i use my EDGEHD800 for Ha?

Mark uses a special Edge HD: https://airylab.com/hat-solar-telescopes/
You need this erf: https://www.baader-planetarium.com/en/s ... 80mm).html
Or ask Valery on this forum.
by bart1805
Wed Apr 25, 2018 8:37 pm
Forum: This is SolarChat !!
Topic: AR12706 in a Single and a Double stack modes through my 280mm scope.
Replies: 12
Views: 464

Re: AR12706 in a Single and a Double stack modes through my 280mm scope.

Beautiful! Is the doublestack image a crop? And another question: although the regular advice is to set Gamma at neutral (and I understand why) I sometimes find that turning the Gamma down when imaging makes it easier to process the image to a really good one with a lot of details. Off course the re...
by bart1805
Wed Apr 25, 2018 8:22 pm
Forum: This is SolarChat !!
Topic: AR2706 21 april
Replies: 24
Views: 895

Re: AR2706 21 april

I suggest trying out my adjustment methods on a day when you have fairly decent seeing. The focus peak and etalon dip should be readily apparent. Both should be very close to what you would set using direct observation of the image. When the seeing gets poor, I trust the histogram more than my eyes...