Search found 255 matches

by fjabet
Tue Jul 26, 2016 1:06 pm
Forum: This is SolarChat !!
Topic: High resolution animations from an amazing location
Replies: 17
Views: 2807

Re: High resolution animations from an amazing location

Thank you all, here is the next batch ! http://astrochonum.com/Astro/solaire/Juillet-2014-StVeran/Prot18.jpg http://astrochonum.com/Astro/solaire/Juillet-2014-StVeran/20.jpg http://astrochonum.com/Astro/solaire/Juillet-2014-StVeran/20_Invert.jpg http://astrochonum.com/Astro/solaire/Juillet-2014-StVe...
by fjabet
Mon Jul 25, 2016 8:30 am
Forum: This is SolarChat !!
Topic: High resolution animations from an amazing location
Replies: 17
Views: 2807

High resolution animations from an amazing location

Hello all, I'm just back with some friends from St Veran observatory in the french Alps. This observatory is one of the two high altitude observatories in France with the famous Pic du Midi. It is at almost 3000m and this is a facility dedicated to amateurs with three large domes. We can use one 600...
by fjabet
Fri Jun 24, 2016 6:45 am
Forum: This is SolarChat !!
Topic: Dancing spicules
Replies: 9
Views: 1135

Re: Dancing spicules

Thanks guys !

It is a double stack indeed : PST+diagonal+LS50FHa.
The diagonal allows to avoid reflections between the two etalons.
by fjabet
Thu Jun 23, 2016 6:16 pm
Forum: This is SolarChat !!
Topic: Dancing spicules
Replies: 9
Views: 1135

Dancing spicules

Hello all, six minutes of dance from 8h56 to 9h03, that gives a pretty good idea of what you see in the eyepiece. And that explains why I do less and less imaging ! I think Mark would confirm that it is an amazing thing to see. http://astrochonum.com/Astro/solaire/23-Juin-2016/batch2.gif http://astr...
by fjabet
Fri Jun 10, 2016 4:06 pm
Forum: This is SolarChat !!
Topic: Solar Adaptive Optics
Replies: 20
Views: 1409

Re: Solar Adaptive Optics

I'm sorry to be the one who breaks your dreams apart, but there will be no AO for amateurs. Not in near future at least. An AO for astronomy in a nutshell : - Closed loop speed faster than seeing coherency time, ie above 500Hz at the very least - Isoplanetism angle of a few arcsec : that means you c...
by fjabet
Tue Jun 07, 2016 12:42 pm
Forum: Commercial Solar Filters/Cameras/Hardware
Topic: TecnoSky152 H-alpha scope - worth the price?
Replies: 28
Views: 8814

Re: TecnoSky152 H-alpha scope - worth the price?

You would be amazed to see what is possible even with a RC. If the CO was an issue, planetary imagers would have burn their C14 :) Below is an image of Emmanuel Beaudoin done with a 200mm RC at 50% CO : http://airylab.com/contenu/images-basler/taches_ACA1300_RC8_14_juin_2012.jpg Another with a CN212...
by fjabet
Tue Jun 07, 2016 9:37 am
Forum: Commercial Solar Filters/Cameras/Hardware
Topic: SM60 II views poorer than SM40s - Why?
Replies: 16
Views: 5392

Re: SM60 II views poorer than SM40s - Why?

I used an FS60 with two SM60 I and it was very good.
I think your issue is rather with the FWHM as stated above. The SM type II are usually less good than type I, hence the rocketing price of second hand type I :)
by fjabet
Tue Jun 07, 2016 9:33 am
Forum: Commercial Solar Filters/Cameras/Hardware
Topic: TecnoSky152 H-alpha scope - worth the price?
Replies: 28
Views: 8814

Re: TecnoSky152 H-alpha scope - worth the price?

As for 6" Refractor vs 8" Reflector, the 6" has more resolving power as the real resolving power of an 8" SCT is 5.3". Hello Rupert, a 8" reflector has the resolving power of a 8" aperture. The resolution only depends on the aperture, CO doesn't account on the PSF size. Now when looking more closel...
by fjabet
Mon May 30, 2016 6:51 pm
Forum: Commercial Solar Filters/Cameras/Hardware
Topic: TecnoSky152 H-alpha scope - worth the price?
Replies: 28
Views: 8814

Re: TecnoSky152 H-alpha scope - worth the price?

200mm is a nice balance. Lower (152) the resolution difference is quite important, higher (>250mm) and you'd better have a very very very good site. I have a 280mm HaT, and I use much much more my 203mm :) Regarding the glasses, there is a real potential "glassgate" in the amateur market. When the m...
by fjabet
Mon May 30, 2016 6:41 pm
Forum: Commercial Solar Filters/Cameras/Hardware
Topic: Want to order Solar Scintillation Monitor - questions
Replies: 9
Views: 3799

Re: Want to order Solar Scintillation Monitor - questions

Hello ! I'm not Jean Pierre although we know each other very well and we live in the same area. But he has a far better seeing than I do :p Some of my images are here : http://astrochonum.com/index.php?option=com_content&view=category&layout=blog&id=4&Itemid=6&lang=en As for the SSM, we exchanged wi...
by fjabet
Sun May 08, 2016 3:20 pm
Forum: This is SolarChat !!
Topic: Solar Activity May 5th with refractor 230mm Special H-alpha
Replies: 15
Views: 1385

Re: Solar Activity May 5th with refractor 230mm Special H-al

Nice shot Jean Pierre. Your big gun wasn't too much agitated in the wind ?
I guess we are out of the race for tomorrow hereby indeed...
by fjabet
Sun May 08, 2016 3:16 pm
Forum: This is SolarChat !!
Topic: Windy, cloudy, but active sun !
Replies: 9
Views: 940

Re: Windy, cloudy, but active sun !

Thx guys ! The stack is : 210mm Airylab ERF on top of the CN212 (could be a HaT, same thing) -> BF15+KG3 -> telecentric -> PST etalon (no lenses) -> 2" diagonal (important, the distance between the two etalons is required to avoid reflections) -> Lunt LHa 50mm etalon -> helicoidal focuser/tilt adapt...
by fjabet
Sun May 08, 2016 3:09 pm
Forum: This is SolarChat !!
Topic: Thursday Morning Animations with The HaT - 5th May
Replies: 12
Views: 732

Re: Thursday Morning Animations with The HaT - 5th May

Nice shots Mark, maybe a little too much deconvolution that creates filament looking artefacts.
This is something I saw a lot when I was jury for a contest with PixInsight processed images.
by fjabet
Sat May 07, 2016 4:41 pm
Forum: This is SolarChat !!
Topic: Windy, cloudy, but active sun !
Replies: 9
Views: 940

Re: Windy, cloudy, but active sun !

And the negative/color versions...
The negative is almost decent :)

Image

Image
by fjabet
Sat May 07, 2016 4:23 pm
Forum: This is SolarChat !!
Topic: Windy, cloudy, but active sun !
Replies: 9
Views: 940

Windy, cloudy, but active sun !

Too much wind today to have high resolution, that's a pity for the seeing was good. But the AP900 was struggling in the wind. So a reduced mosaic, with the reducer down to F/10. Not very homogeneous due to the clouds, but the new double stack seems to work like a charm :) http://astrochonum.com/Astr...
by fjabet
Sat Apr 23, 2016 8:09 am
Forum: Commercial Solar Filters/Cameras/Hardware
Topic: Point Grey Grasshopper USB3 IMX174 Advice please
Replies: 13
Views: 4977

Re: Point Grey Grasshopper USB3 IMX174 Advice please

@Ewan : Genika should run your camera at full speed. A i3 isn't an entry level, I've a customer who runs an IMX174 on the AMD equivalent of a celeron :) Genika is by far the most CPU friendly of all acquisition softwares. Check that you are using mode0 (so mode7 unchecked) and raw mode in Genika opt...
by fjabet
Sat Apr 23, 2016 8:04 am
Forum: Commercial Solar Filters/Cameras/Hardware
Topic: Point Grey Grasshopper USB3 IMX174 Advice please
Replies: 13
Views: 4977

Re: Point Grey Grasshopper USB3 IMX174 Advice please

Actually I added another setting for PGR camera in the very last release of yesterday. Some PGR camera will run faster in Raw mode than in Monoxx mode. Raw bypasses the FPGA, the Mono goes through it. Note that gamma is provided by the FPGA. So I added a setting, just below the one Alexandra has kin...
by fjabet
Sat Apr 23, 2016 7:58 am
Forum: Solar Scope Modifications
Topic: Can a good quark replace blocking filters?
Replies: 1
Views: 2546

Re: Can a good quark replace blocking filters?

But it doesn't work the other way around, ie you can't use the Andover blocker for Coronado or Lunt as there finesse is lower and the comb frequency distribution is narrower on air spaced etalon.
by fjabet
Thu Apr 21, 2016 5:15 pm
Forum: This is SolarChat !!
Topic: Some Closeup Shots From Sunday - Playing Catchup 17th April
Replies: 24
Views: 1167

Re: Some Closeup Shots From Sunday - Playing Catchup 17th Ap

You should try to recontact your SM40, it is not very difficult. Try to pry on the spacers first as mentionned, don't be shy. If you have the Van der Vaals bonding, you'll hear a snap, and the reflections of the spacers will disappear. If that doesn't work, dissociate both element, clean with aceton...
by fjabet
Wed Apr 13, 2016 5:45 am
Forum: This is SolarChat !!
Topic: AR2529 C11 280mm + ARIES 295mm D-ERF
Replies: 39
Views: 3824

Re: AR2529 C11 280mm + ARIES 295mm D-ERF

I come back on your amazing image, I'm wondering if I should put back the coated corrector on my C11 :)

What processing did you use if you agree to share ? I find that processing high sampling (<0,2"/pixel) very difficult.
Did you use inPPG ?
by fjabet
Wed Apr 13, 2016 5:42 am
Forum: This is SolarChat !!
Topic: First solar session of the year: AR2529 in hires with 356mm
Replies: 18
Views: 1303

Re: First solar session of the year: AR2529 in hires with 35

Nice shot Alessandro :)
Still using Genika ?
by fjabet
Wed Apr 13, 2016 5:39 am
Forum: This is SolarChat !!
Topic: NOAA 12529, WL, H-alpha and gif from Sicily April 11, 2016
Replies: 18
Views: 1505

Re: NOAA 12529, WL, H-alpha and gif from Sicily April 11,

Nice result, I think you are at the resolution limit here :)
by fjabet
Wed Apr 13, 2016 5:37 am
Forum: This is SolarChat !!
Topic: Better sunshine today
Replies: 29
Views: 2283

Re: Better sunshine today

Very nice animation Alexandra ! This filament is really flying !
by fjabet
Wed Apr 13, 2016 5:34 am
Forum: This is SolarChat !!
Topic: AR2529, new setup, good seeing
Replies: 10
Views: 781

Re: AR2529, new setup, good seeing

Thanks you all for your kindness :)
by fjabet
Tue Apr 12, 2016 9:09 pm
Forum: This is SolarChat !!
Topic: AR2529 C11 280mm + ARIES 295mm D-ERF
Replies: 39
Views: 3824

Re: AR2529 C11 280mm + ARIES 295mm D-ERF

Amazing result Valery, your seeing was extraordinary !