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Lou took this great image of a prom with his Lunt152 double stacked with a Quark

Welcome to Solar Chat! The best forum for Solar Astronomy
Moving forward from solar cycle 24 to 25

Search found 3323 matches

by Valery
Sun Mar 16, 2014 7:12 am
Forum: This is SolarChat !!
Topic: Second go at 150mm Mod
Replies: 22
Views: 749

Re: Second go at 150mm Mod

Had another go at this contraption today. Extremely seeing dependent and wind is a major factor with the length of the scope. Conditions were better today and seeing had improved a bit. Not as good as Valery or Neo but I am getting there. Very good shots! I belive that your mod is PST stage 2. Righ...
by Valery
Sun Mar 16, 2014 4:55 am
Forum: This is SolarChat !!
Topic: Sun 03 13 2014 through 150mm Ha telescope at good seeing.
Replies: 13
Views: 726

Re: Sun 03 13 2014 through 150mm Ha telescope at good seeing

Superb results!! Obviously the seeing was pretty good. No! Not pretty good. Just good seeing or even just better than poor seeing I have earlier. With pretty good seeing the images are even better and show significantly finer details. Pretty good seeing allows only 15-20 seconds movies and fast mov...
by Valery
Sun Mar 16, 2014 4:48 am
Forum: This is SolarChat !!
Topic: Sun 03 13 2014 through 150mm Ha telescope at good seeing.
Replies: 13
Views: 726

Re: Sun 03 13 2014 through 150mm Ha telescope at good seeing

Thank you all, guys, for your kind words. Yes, Mark, the kit will be commercially available, but it will be not very cheap. Several reasons for this: 1. Five lenses it two groups. This is not a simple two lens design like in other equipments. Why so many? Very simple - for best possible uncompromise...
by Valery
Sat Mar 15, 2014 2:50 pm
Forum: This is SolarChat !!
Topic: Sun 03 13 2014 through 150mm Ha telescope at good seeing.
Replies: 13
Views: 726

Sun 03 13 2014 through 150mm Ha telescope at good seeing.

Hi here, Yesterday, March 13 2014, I was able to take some large scale photos of the Sun trough my 150mm Ha telescope with ARIES solar conversion kit, LS50F Ha etalon (+B1200 blocker) and PGR camera. 200 frames out of 1500 were stacked and then processed for each photo. Here the links to the photos....
by Valery
Sat Mar 15, 2014 2:49 pm
Forum: This is SolarChat !!
Topic: Sun 03 13 2014 through 150mm Ha telescope at good seeing.
Replies: 3
Views: 178

Sun 03 13 2014 through 150mm Ha telescope at good seeing.

Hi here, Yesterday, March 13 2014, I was able to take some large scale photos of the Sun trough my 150mm Ha telescope with ARIES solar conversion kit, LS50F Ha etalon (+B1200 blocker) and PGR camera. 200 frames out of 1500 were stacked and then processed for each photo. Here the links to the photos....
by Valery
Wed Mar 05, 2014 8:39 pm
Forum: Solar Scope Modifications
Topic: A surprise in the LUNT CaK wedge
Replies: 218
Views: 12356

Re: A surprise in the LUNT CaK wedge

Can somebody tell me which is better for CaK photography - a modified CaK PST (with 2,2A filter) or a LUNT CaK wedge? Which one deliver more contrast, more detailed and more bright image? Thanks. Valery. Difficult question. I think the biggest thing with CaK is the refractor it is used with in term...
by Valery
Wed Mar 05, 2014 6:33 pm
Forum: Solar Scope Modifications
Topic: A surprise in the LUNT CaK wedge
Replies: 218
Views: 12356

Re: A surprise in the LUNT CaK wedge

Can somebody tell me which is better for CaK photography - a modified CaK PST (with 2,2A filter) or a LUNT CaK wedge?
Which one deliver more contrast, more detailed and more bright image?

Thanks.

Valery.
by Valery
Tue Feb 25, 2014 10:07 pm
Forum: Solar Scope Modifications
Topic: A surprise in the LUNT CaK wedge
Replies: 218
Views: 12356

Re: A surprise in the LUNT CaK wedge

marktownley wrote:We need someone who can manufacture these CaK filters economically to the 2.2a bandpass - Aries? ;)
No, not at this moment and nearest future. :)

But what with Andor 390 + 393( ? ) filters combo? As I saw the pictures, they are nearly as good as with Lunt wedge and brighter.
by Valery
Tue Feb 25, 2014 12:42 pm
Forum: Solar Scope Modifications
Topic: A surprise in the LUNT CaK wedge
Replies: 218
Views: 12356

Re: A surprise in the LUNT CaK wedge

swisswalter wrote: The search goes on. The show must go on ;-)
I read the thread with a greet interest. Thanks to all who have participated.

But the question what is the end of story?
by Valery
Tue Feb 18, 2014 11:24 am
Forum: Commercial Solar Filters/Cameras/Hardware
Topic: whats the best scope to use ith a SM90II etalon and BF30?
Replies: 26
Views: 3192

Re: whats the best scope to use ith a SM90II etalon and BF30

The best telescope for using a Ha 90mm external etalon is a telescope with minimal spherical aberration at this wave length. Among compact telescopes are: 1. Synta or Made 102mm F/10 simple achromat. Any of them. Will work better than any TAK doublet apochromat. 2. Meade AR 129mm F=1200mm will work ...
by Valery
Tue Feb 18, 2014 6:34 am
Forum: Commercial Solar Filters/Cameras/Hardware
Topic: New Ha telescope
Replies: 5
Views: 1564

Re: New Ha telescope

[quote="DSobserver"]French brand seems to finally optimize the ERF treatment for sc telescope. Who's ready for a 280mm Ha scope? :shock: Hi Frédéric, Question. Is the ERF is applied to the telescope corrector or is it the separate thin glass plate installed in front of the corrector? Thanks, Valery.
by Valery
Sun Feb 16, 2014 11:55 am
Forum: This is SolarChat !!
Topic: Transmission curves for CaK filters.
Replies: 1
Views: 123

Transmission curves for CaK filters.

Hi all,

Can anybody give me a link where I can see the transmission curves of Lun CaK module, Baader CaK filter (8nm) etc
And are there any comparison between performance of both these filters?

Thanks,

Valery.
by Valery
Sun Feb 16, 2014 11:50 am
Forum: Solar Astronomy Shop and Swap
Topic: Need a LS50-FHa etalon, not the DS unit.
Replies: 3
Views: 864

Re: Need a LS50-FHa etalon, not the DS unit.

swisswalter wrote:Hi Valery


the LS50 works as double stack unit on a Lunt 60 as well as a stand alone Etalon together with a blocking filter on different refractors
I know, I know. But I need a standard LS50FHa better circa 2007-2008 year, not the LS50FHa which sells as a DS unit.


Valery.
by Valery
Fri Feb 14, 2014 6:02 pm
Forum: Solar Astronomy Shop and Swap
Topic: Need a LS50-FHa etalon, not the DS unit.
Replies: 3
Views: 864

Need a LS50-FHa etalon, not the DS unit.

If you have one for sale, let me know.

Valery.
by Valery
Fri Jan 31, 2014 2:14 am
Forum: This is SolarChat !!
Topic: C8 HA second shot : with PST etalon
Replies: 18
Views: 1237

Re: C8 HA second shot : with PST etalon

The best compromise for the amateur is the USB3 interface that supports up to 90fps. Note that the CMOSIS is a difficult companion and requires some learning curve :) Frederic, Most of us do not like compromises. The frame rate factor is one of the most important in solar photography. This is espec...
by Valery
Wed Jan 29, 2014 6:04 pm
Forum: This is SolarChat !!
Topic: C8 HA second shot : with PST etalon
Replies: 18
Views: 1237

Re: C8 HA second shot : with PST etalon

@Valery : http://en.ids-imaging.com/store/ui-3370cp.html?SID=p5t9po0b899pmo6bk5sgqkhjr2&___store=sv_gmbh_en&___from_store=sv_gmbh_fr We sell it in Europe, for US and RoW there are local dealers. We support it with our software Genika Astro. @Suncityan : at this moment we do only C8 EdgeHD for align...
by Valery
Wed Jan 29, 2014 2:48 pm
Forum: This is SolarChat !!
Topic: C8 HA second shot : with PST etalon
Replies: 18
Views: 1237

Re: C8 HA second shot : with PST etalon


- The BF15 forced me to reduce dramatically the AoI size of the large CMOSIS CMV4000 to 1000x1000, but it delivers 200 fps then.



What is the camera model do you use? Give us a link, please.
by Valery
Tue Jan 21, 2014 7:24 am
Forum: Commercial Solar Filters/Cameras/Hardware
Topic: Ca K telescope
Replies: 82
Views: 6220

Re: Ca K telescope

The next steps in my ongoing CaK experiment is to mount my CaK filters in a collimated beam - in similar fashion to a internal etalon Ha scope. It is VERY important that the telescope will be designed straight through. Otherwise you can't warranty what will be a SA correction and coma correction at...
by Valery
Tue Jan 21, 2014 7:07 am
Forum: Commercial Solar Filters/Cameras/Hardware
Topic: Ca K telescope
Replies: 82
Views: 6220

Re: Ca K telescope

Hi here! Let me clarify this subject a bit more. I hope that now you will have a clue. ANY achromatic refractor can be corrected for two wave length in the sense of chromatism correction - in other words only two wave lengths can be put in one focus. All other wave lengths will be focused on lesser ...
by Valery
Mon Jan 20, 2014 8:29 pm
Forum: Commercial Solar Filters/Cameras/Hardware
Topic: Ca K telescope
Replies: 82
Views: 6220

Re: Ca K telescope

[quote]Simpliest Fraunhoffer refractors of smaller apertures and very long F/D, at least F/10 and also they need to be severely UNDERcorrected for green light. Hi Valery, is there a 'list' anywhere that would tell us the telescopes that were undercorrected for green light? Hi Mark, There is no such...
by Valery
Fri Jan 17, 2014 6:34 am
Forum: Commercial Solar Filters/Cameras/Hardware
Topic: Ca K telescope
Replies: 82
Views: 6220

Re: Ca K telescope

Hello all, Let me add, solar funs, that a telescope for CaK is not that simple optically. The reason is that at this wave length _all_ refractors have severe spherical aberration, OVERCORRECTION. In other words, their objectives have longer focus for outer zones and shorter focus for central zones. ...
by Valery
Wed Jan 08, 2014 12:15 pm
Forum: This is SolarChat !!
Topic: AR 1944 in Excellent Seeing Conditions
Replies: 15
Views: 427

Re: AR 1944 in Excellent Seeing Conditions

Nice! Enough said.
by Valery
Tue Jan 07, 2014 5:23 pm
Forum: This is SolarChat !!
Topic: 7 Jan AR 1944 Looks like Australia.
Replies: 12
Views: 127

Re: 7 Jan AR 1944 Looks like Australia.

Very nice work, Ralph! Very high resolution an looks like 3-D view.

Thanks for sharing them with us.
by Valery
Thu Dec 12, 2013 2:56 am
Forum: Solar Scope Modifications
Topic: SM 60 with 127mm F6.5 mod , Anyone try anything like this ?
Replies: 20
Views: 1311

Re: SM 60 with 127mm F6.5 mod , Anyone try anything like this ?

Your work with the 150 mod you've been doing is excellent Valery. Do you think there is a better option for the collimator lens that is used in the PST etalon assembly for when it is used in a PST mod? I think not. In the PST rig (collimator - etalon - refocuser) design there is no room for any sig...
by Valery
Wed Dec 11, 2013 6:05 pm
Forum: Solar Scope Modifications
Topic: SM 60 with 127mm F6.5 mod , Anyone try anything like this ?
Replies: 20
Views: 1311

Re: SM 60 with 127mm F6.5 mod , Anyone try anything like this ?

Hmmm I agree there are some differences, but not such as to significantly impact on the performance of the PST etalon... The vast majority of PST mods have been very successful when applied to basic achromats with an f ratio close to f10. I find the quality of the etalon, alignment, and positioning...