Search found 969 matches

by krakatoa1883
Sat Apr 17, 2021 4:13 pm
Forum: This is SolarChat !!
Topic: Today's SUN (20210417) | FD images (3 lights)
Replies: 6
Views: 100

Re: Today's SUN (20210417) | FD images (3 lights)

Excellent work, Pedro, very sharp discs.
by krakatoa1883
Sat Apr 17, 2021 4:08 pm
Forum: This is SolarChat !!
Topic: HA and Cak from yesterday 15th April.
Replies: 12
Views: 89

Re: HA and Cak from yesterday 15th April.

Fine images, Nigella, CaK proms have been captured really well!
by krakatoa1883
Fri Apr 16, 2021 4:52 pm
Forum: This is SolarChat !!
Topic: A tall flame and AR12814
Replies: 15
Views: 159

Re: A tall flame and AR12814

Simply go on ebay.com or Amazon and type "eyepiece focal reducer" in the search bar, otherwise you can find them from the usual dealers of eyepieces.
by krakatoa1883
Fri Apr 16, 2021 2:28 pm
Forum: This is SolarChat !!
Topic: A tall flame and AR12814
Replies: 15
Views: 159

Re: A tall flame and AR12814

Thanks for comments, much appreciated :) I wish I could figure out how to get full discs with my Coronado SMII 90. Doesn't anyone make an optical element to half the focal length hence the magnification? James, you can make use of a reducer like these below 05x.jpg screwed on the standard nose of my...
by krakatoa1883
Fri Apr 16, 2021 2:16 pm
Forum: This is SolarChat !!
Topic: Fridays Hi-Res Smorgasbord -16th April
Replies: 15
Views: 144

Re: Fridays Hi-Res Smorgasbord -16th April

I am really impressed by your Ca-K images, Mark, a very good result :bow It have the impression, however, that those taken through your TAL are more sharp than these.
by krakatoa1883
Thu Apr 15, 2021 9:48 am
Forum: This is SolarChat !!
Topic: A tall flame and AR12814
Replies: 15
Views: 159

Re: A tall flame and AR12814

Thanks for your comments. ) Did you upgrade the focuser on your Evoguide 50mm, as I understand it is a helical focuser. 2) Also the ASI178mm, I have not seen that used so much. It has small 2.4 um pixels. Did you focal reduce this to get to critical sampling as of : Hi Magnus, you can see the setup ...
by krakatoa1883
Wed Apr 14, 2021 3:00 pm
Forum: This is SolarChat !!
Topic: April 14 Evolution ...
Replies: 20
Views: 171

Re: April 14 Evolution ...

Very good images with much details in the spicule carpet, my Quark Chromo is not so good. Is the interference eliminator needed with the 174 ?
by krakatoa1883
Wed Apr 14, 2021 2:57 pm
Forum: This is SolarChat !!
Topic: a few minutes of happiness April 13
Replies: 12
Views: 143

Re: a few minutes of happiness April 13

Fantastic, Paul, great work!
by krakatoa1883
Wed Apr 14, 2021 2:55 pm
Forum: This is SolarChat !!
Topic: A tall flame and AR12814
Replies: 15
Views: 159

A tall flame and AR12814

Today a tall flame prominence is visible on the E limb, those who can shouldn't miss the view 2021-04-14-1026-Halpha-fulldisc proms.jpg AR12814 in the southern hemisphere is growing although it is still of class B, it's more interesting in H-alpha than in visible light. Another small region is devel...
by krakatoa1883
Sun Apr 11, 2021 1:18 pm
Forum: This is SolarChat !!
Topic: AR12814 in CaK - 11th April
Replies: 29
Views: 264

Re: AR12814 in CaK - 11th April

Fantastic CaK, Mark, the spicule layer and the proms are really impressive, do you process them separately from the disc ?
by krakatoa1883
Sun Apr 11, 2021 1:15 pm
Forum: This is SolarChat !!
Topic: Ca II K and Ha FDs 9th April 2021
Replies: 8
Views: 117

Re: Ca II K and Ha FDs 9th April 2021

Great discs, Stu, well captured filament.
by krakatoa1883
Sun Apr 11, 2021 11:53 am
Forum: Solar Scope Modifications
Topic: Red glass inside Lunt LS50THa
Replies: 7
Views: 163

Re: Red glass inside Lunt LS50THa

Agree, want to remove it because is mounted in a barrel slightly larger than 2" that can't be inserted in the 2" focuser of the receiving scope and therefore requires an extension, this put the etalon in the wrong position. If I remove the barrel I can solve the problem.
by krakatoa1883
Sat Apr 10, 2021 5:06 pm
Forum: Solar Scope Modifications
Topic: Red glass inside Lunt LS50THa
Replies: 7
Views: 163

Re: Red glass inside Lunt LS50THa

Thank you very much for your answers, my concern was about not to damage the etalon.
by krakatoa1883
Fri Apr 09, 2021 3:44 pm
Forum: Solar Scope Modifications
Topic: Red glass inside Lunt LS50THa
Replies: 7
Views: 163

Red glass inside Lunt LS50THa

I am looking for the transmission characteristics of the red glass which is in front of the etalon assembly of my Lunt 50 pressure tuning module but I couldn't find anything, I suppose it is an internal ERF or something like that. I wonder if I can use the PT module without this red glass when there...
by krakatoa1883
Fri Apr 09, 2021 10:18 am
Forum: This is SolarChat !!
Topic: Dark filament on the NE
Replies: 12
Views: 130

Re: Dark filament on the NE

Thanks. That's an excellent image Raf, almost has a double stack look to it. The behaviour of my PT is very erratic, sometimes is disappointing sometimes is similar to having a DS. Surely it is temperature-dependent and I noted also that between the original B600 and the the B1200 I purchased later ...
by krakatoa1883
Fri Apr 09, 2021 7:25 am
Forum: This is SolarChat !!
Topic: Sun in Ha and CaK 7th April 2021
Replies: 12
Views: 143

Re: Sun in Ha and CaK 7th April 2021

Great images, Stu. Side reflections are an annoying problem with most filters, better to leave them, however, than sacrifice the detail.
by krakatoa1883
Fri Apr 09, 2021 7:22 am
Forum: This is SolarChat !!
Topic: halpha sun on 8 April
Replies: 13
Views: 144

Re: halpha sun on 8 April

Great discs, very sharp indeed!
by krakatoa1883
Fri Apr 09, 2021 7:21 am
Forum: This is SolarChat !!
Topic: Dark filament on the NE
Replies: 12
Views: 130

Re: Dark filament on the NE

Thanks for your kind comments :)
by krakatoa1883
Thu Apr 08, 2021 3:03 pm
Forum: This is SolarChat !!
Topic: April 6 2021 Observations
Replies: 9
Views: 95

Re: April 6 2021 Observations

Thanks for your detailed observing notes, James, what a lovely iPhone capture!
by krakatoa1883
Thu Apr 08, 2021 2:56 pm
Forum: This is SolarChat !!
Topic: 6th April 2021 Ca-K line
Replies: 22
Views: 189

Re: 6th April 2021 Ca-K line

Great images, Nigella, lovely colour!
by krakatoa1883
Thu Apr 08, 2021 2:40 pm
Forum: This is SolarChat !!
Topic: animation of April 7 one of my best
Replies: 12
Views: 144

Re: animation of April 7 one of my best

Great animation, banjo!
by krakatoa1883
Thu Apr 08, 2021 2:38 pm
Forum: This is SolarChat !!
Topic: Dark filament on the NE
Replies: 12
Views: 130

Dark filament on the NE

Still no spots today, and few faculae only. Looking through my Lunt 50 I noted a dark filament close to the NE limb so I decided to take a closer view. This time I used a Celestron XLT 100ED scope modified with the Lunt PT module, seeing was only slightly less than awful nevertheless it was worth of...
by krakatoa1883
Wed Apr 07, 2021 3:02 pm
Forum: Commercial Solar Filters/Cameras/Hardware
Topic: IS MY PRESSER TUNER OK
Replies: 23
Views: 200

Re: IS MY PRESSER TUNER OK

EGRAY_OBSERVATORY wrote: Wed Apr 07, 2021 10:45 amwhat does cold/mild/warm weather really mean ??
In my location at 45°N and 120m a.s.l. "cold" means 5°C or lower, I actually avoid using the scope when air is close to 0°C, I prefer to use a Quark wrapped in a dew heater instead.
by krakatoa1883
Wed Apr 07, 2021 2:56 pm
Forum: This is SolarChat !!
Topic: Calcium Sun - 6th April
Replies: 14
Views: 175

Re: Calcium Sun - 6th April

Great images, Mark. Which scope,TAL or Bresser ?
by krakatoa1883
Wed Apr 07, 2021 10:35 am
Forum: Commercial Solar Filters/Cameras/Hardware
Topic: IS MY PRESSER TUNER OK
Replies: 23
Views: 200

Re: IS MY PRESSER TUNER OK

In cold weather the o-rings shrink and become stiff therefore the PT system becomes less efficient, the BF also doesn't work properly. I always see this happening on my Lunt scope which performs best in mild and warm weather.