Search found 305 matches

by allhoest
Sun Aug 23, 2020 6:30 pm
Forum: This is SolarChat !!
Topic: Spot, Granulation, Facula, Pattern in KLine with a T300
Replies: 13
Views: 204

Re: Spot, Granulation, Facula, Pattern in KLine with a T300

Thank you again for the comments. Leo, you would wonder my setup: the mirror is an old mirror from the 80's which has been converted to solar, the truss and other parts are second hand, which I adapted a bit in my garage. The old F6 optic looks to be good and I have a good secondary also. I should g...
by allhoest
Sat Aug 22, 2020 6:55 pm
Forum: This is SolarChat !!
Topic: Surface, Spot, Faculae and Protuberance in CaK with a T300
Replies: 8
Views: 189

Re: Surface, Spot, Faculae and Protuberance in CaK with a T300

Thanks again,

The filter is a Lunt Cak.
The front filters of the Lunt have been replaced by a KLine.
As per the Kline pictures with the same scope, the pictures have been taken from St Véran / France (Alps).

CS
Alex
by allhoest
Fri Aug 21, 2020 7:41 pm
Forum: Solar Scope Modifications
Topic: Solar newton - An open support for the primary mirror
Replies: 0
Views: 113

Solar newton - An open support for the primary mirror

With a solar newton, the primary is dealuminated and the 96% of the main unreflected flux must be evacuated backwards. The primary support must leave a field open to the maximum. http://www.presencenet.be/nucleus2.0/media/13/20200821-01_20200812_094557_crs.jpg In the first version of the primary mir...
by allhoest
Fri Aug 21, 2020 6:20 pm
Forum: This is SolarChat !!
Topic: Spot, Granulation, Facula, Pattern in KLine with a T300
Replies: 13
Views: 204

Re: Spot, Granulation, Facula, Pattern in KLine with a T300

Hi!
Thanks for the comments.
Yes, I used a Baader KLine filter at 396nm (not 296nm!).
CS
Alex.
by allhoest
Thu Aug 20, 2020 6:36 pm
Forum: This is SolarChat !!
Topic: Surface, Spot, Faculae and Protuberance in CaK with a T300
Replies: 8
Views: 189

Surface, Spot, Faculae and Protuberance in CaK with a T300

Finally, here are the pics taken with a CaK rear filter in the train. The protuberances were more challenging, as the light flux is very low and was mixed up with internal reflection. Forgive me for some stronger photoshop intrusions here. http://www.presencenet.be/nucleus2.0/media/13/20200819-20200...
by allhoest
Thu Aug 20, 2020 6:34 pm
Forum: This is SolarChat !!
Topic: Spot, Granulation, Facula, Pattern in KLine with a T300
Replies: 13
Views: 204

Spot, Granulation, Facula, Pattern in KLine with a T300

Hi! Here a first set of pics taken from St Véran (French Alps) with a non aluminized 12" mirror. The pics are taken in KLine (296nm). http://www.presencenet.be/nucleus2.0/media/13/20200819-20200809_02_S01_12_094248_..._Denois.jpg http://www.presencenet.be/nucleus2.0/media/13/20200819-20200814_01_S01...
by allhoest
Thu Aug 20, 2020 6:34 pm
Forum: SPoD Archive
Topic: Spot, Granulation, Facula, Pattern in KLine with a T300
Replies: 7
Views: 66

Spot, Granulation, Facula, Pattern in KLine with a T300

Hi! Here a first set of pics taken from St Véran (French Alps) with a non aluminized 12" mirror. The pics are taken in KLine (296nm). http://www.presencenet.be/nucleus2.0/media/13/20200819-20200809_02_S01_12_094248_..._Denois.jpg http://www.presencenet.be/nucleus2.0/media/13/20200819-20200814_01_S01...
by allhoest
Mon Aug 17, 2020 7:51 pm
Forum: This is SolarChat !!
Topic: CaK and Ha with a T250
Replies: 12
Views: 228

Re: CaK and Ha with a T250

Thanks for the comments. The results are superior than the one I could achieve in my location. But the conditions were difficult at St Véran and I needed to glue my eyes on the screen all time and catch quieter moments. The CaK is a Lunt mod, meaning that the 2 front filters have been removed and re...
by allhoest
Sun Aug 16, 2020 8:05 pm
Forum: This is SolarChat !!
Topic: CaK and Ha with a T250
Replies: 12
Views: 228

CaK and Ha with a T250

Hi! Here under, some pics from St Véran with a 250mm newton having a multilayer treatment. The seeing conditions were the worst over the last 4 observations there. Here, with a CaK filter. http://www.presencenet.be/nucleus2.0/media/13/20200816-20200808_01_S01_12_095307_....jpg http://www.presencenet...
by allhoest
Sun Aug 16, 2020 8:05 pm
Forum: SPoD Archive
Topic: CaK and Ha with a T250
Replies: 8
Views: 95

CaK and Ha with a T250

Hi! Here under, some pics from St Véran with a 250mm newton having a multilayer treatment. The seeing conditions were the worst over the last 4 observations there. Here, with a CaK filter. http://www.presencenet.be/nucleus2.0/media/13/20200816-20200808_01_S01_12_095307_....jpg http://www.presencenet...
by allhoest
Thu Jun 11, 2020 6:41 pm
Forum: Solar Astronomy Shop and Swap
Topic: SSM, SM60 adapter, Powermate, etc.
Replies: 4
Views: 9442

Re: SSM, SM60 adapter, Powermate, etc.

We can consider this ad as closed.

The SSM is sold, sorry.
The SM60 adapter and powermate also.
Most of the deep sky stuff also.

CS
Alex
by allhoest
Sun Jun 07, 2020 8:33 pm
Forum: This is SolarChat !!
Topic: ASI ZWO 1600MM vs ASI ZWO 1600MM Pro
Replies: 13
Views: 453

Re: ASI ZWO 1600MM vs ASI ZWO 1600MM Pro

The "classic" for solar imaging is the ASI174MM. It supports 1936X1216@164FPS Full well: 32ke- It is a global shutter camera. The 1600 supports "only" 1920×1680 57.7fps Full well: 20ke- It is a rolling shutter camera. But the 1600 has about twice less read noise which is a + factor. From the numbers...
by allhoest
Sun May 31, 2020 6:14 pm
Forum: Solar Astronomy Shop and Swap
Topic: Baader Coronagraph IV
Replies: 0
Views: 416

Baader Coronagraph IV

Hello again :-) Here, a rare instrument for sale: A Baader Mark IV Coronagraph + the passing optic. + ERF 60mm + X-Y excentrer The optic a Zeiss D63mm F840mm. Here some pics. Feel free to ask more. 1000Eur + shipping Payment in Eur over bank transfer (IBAN). Contact per e-mail: allhoest@scarlet.be I...
by allhoest
Sun May 31, 2020 6:08 pm
Forum: Solar Astronomy Shop and Swap
Topic: PST Nr 97691 Made in the USA
Replies: 0
Views: 278

PST Nr 97691 Made in the USA

04_20200428_180955_crs 111.jpg Hi, I have a PST for sale. Here some pics. Feel free to ask more. 400Eur + shipping Payment in Eur over bank transfer (IBAN). Contact per e-mail: allhoest@scarlet.be It looks that the borders are slowly opening. If so, I'll then ship from Germany, which is normally ch...
by allhoest
Sun Apr 12, 2020 2:21 pm
Forum: This is SolarChat !!
Topic: 2020-04-11 - First try at a prominence animation
Replies: 15
Views: 2864

Re: 2020-04-11 - First try at a prominence animation

I LOVE prom animations.
This one is very dynamic; great job!
Yes, it time consuming.
CS
Alex
by allhoest
Sun Apr 12, 2020 2:18 pm
Forum: This is SolarChat !!
Topic: Today's SUN (20200412) | DS SM60/SM40
Replies: 14
Views: 3337

Re: Today's SUN (20200412) | DS SM60/SM40

Your Ha double stack is very uniform and also your SM40 and SM60+SM40 provide outstandingly fine results.
CS
Alex
by allhoest
Sun Apr 12, 2020 2:08 pm
Forum: This is SolarChat !!
Topic: WL from 11th April
Replies: 14
Views: 3140

Re: WL from 11th April

Excellent Freddie.
I come with the same question: can you provide details about your setup.
Thank you.
CS
Alex
by allhoest
Sun Apr 12, 2020 2:07 pm
Forum: This is SolarChat !!
Topic: following day of April 10 + NEW Animation
Replies: 9
Views: 2620

Re: following day of April 10 + NEW Animation

Beautiful
CS
Alex
by allhoest
Sat Apr 11, 2020 9:51 pm
Forum: This is SolarChat !!
Topic: Today with a Baader Coronograph IV
Replies: 13
Views: 2982

Re: Today with a Baader Coronograph IV

Hello Alfred,
Here, some pics.
CS
Alex
S02_20200408_123511_rot-crs.jpg
S02_20200408_123511_rot-crs.jpg (65.99 KiB) Viewed 2893 times
S02_20200408_123516_crs.jpg
S02_20200408_123516_crs.jpg (233.64 KiB) Viewed 2893 times
by allhoest
Sat Apr 11, 2020 9:14 am
Forum: This is SolarChat !!
Topic: April 7, 2020 AR and Prom
Replies: 17
Views: 3815

Re: April 7, 2020 AR and Prom

Stunning shots!
CS
Alex
by allhoest
Sat Apr 11, 2020 9:08 am
Forum: This is SolarChat !!
Topic: 2020-04-09 AR12759 + new bright spot (HA)
Replies: 14
Views: 3185

Re: 2020-04-09 AR12759 + new bright spot (HA)

I see more and more images with some activity.
I'm looking forward for the new cycle.
Very fine pics.
CS
Alex
by allhoest
Sat Apr 11, 2020 9:04 am
Forum: This is SolarChat !!
Topic: April 8 Observations and new Altair wedge!
Replies: 17
Views: 3533

Re: April 8 Observations and new Altair wedge!

A solar wedge gives much better/contrasted view(image) than a regular front astrosolar (or any other make) filter. The solar continuum filter is passing above 800nm, at least mine. I would strongly recommend to use an IR cut or an UV/IR. The polarizing filters are also generally passing in IR. Care ...
by allhoest
Sat Apr 11, 2020 8:51 am
Forum: This is SolarChat !!
Topic: Double stack Coronado SM (UPDATED)
Replies: 30
Views: 4532

Re: Double stack Coronado SM

Very interesting this idea of having the SM60 almost "inside" of the SM90. The SM90 has probably a bigger central spot than the one of the SM60. Here is my experience about stacking 2 old fashion SM60. Stupidly, the treat of the front and rear of the SM are not the same, so an adapter is needed. Tun...
by allhoest
Sat Apr 11, 2020 8:33 am
Forum: This is SolarChat !!
Topic: animation of the day of April 9
Replies: 12
Views: 3026

Re: animation of the day of April 9

Very patient job. Congrats.
I wish I could once image one.

When editing your post, there is a button "media" just above the edition field.
You give a try.

CS
Alex