Search found 886 matches

by krakatoa1883
Mon Feb 01, 2021 6:01 pm
Forum: This is SolarChat !!
Topic: Few January images
Replies: 8
Views: 82

Re: Few January images

Thanks for your comments :)
by krakatoa1883
Mon Feb 01, 2021 6:01 pm
Forum: SPoD Archive
Topic: Few January images
Replies: 7
Views: 46

Re: Few January images

Thanks for your comments :)
by krakatoa1883
Mon Feb 01, 2021 5:56 pm
Forum: Commercial Solar Filters/Cameras/Hardware
Topic: Readily Available Long Focal Length Refractors
Replies: 33
Views: 679

Re: Readily Available Long Focal Length Refractors

Mark, based on my experience - and yours, I understand - a long refractor with an aperture stop will always be better than a refractor with the same focal length and just that aperture. Stopping down means that only the best corrected part of the glass is working and one can also change the stop dia...
by krakatoa1883
Sun Jan 31, 2021 3:47 pm
Forum: SPoD Archive
Topic: Few January images
Replies: 7
Views: 46

Few January images

December 2020 and this January were the worst I remember, I have been able to do only very few images most of them in awful seeing conditions. For most of the time I have been forced to limit my ambitions to the use of the small Lunt50, calcium and WL imaging being impossible. I saved just the four ...
by krakatoa1883
Sun Jan 31, 2021 3:47 pm
Forum: This is SolarChat !!
Topic: Few January images
Replies: 8
Views: 82

Few January images

December 2020 and this January were the worst I remember, I have been able to do only very few images most of them in awful seeing conditions. For most of the time I have been forced to limit my ambitions to the use of the small Lunt50, calcium and WL imaging being impossible. I saved just the four ...
by krakatoa1883
Mon Jan 18, 2021 5:21 pm
Forum: Commercial Solar Filters/Cameras/Hardware
Topic: Camera choice
Replies: 3
Views: 129

Re: Camera choice

Chameleon is a great camera for solar although the sensor is small. The USB 2.0 version seems now discontinued but it may still be found.

With my Lunt 50 I need to attach the camera to the T2 thread by means of a short C-T2 adapter to reach focus, don't know if needed with LS60 too.
by krakatoa1883
Tue Jan 12, 2021 4:00 pm
Forum: Commercial Solar Filters/Cameras/Hardware
Topic: Bubbles
Replies: 7
Views: 290

Re: Bubbles

Hi Mark, it's not rust they are bubbles in the glue between the elements, the external surfaces are perfect.
by krakatoa1883
Mon Jan 11, 2021 4:39 pm
Forum: Commercial Solar Filters/Cameras/Hardware
Topic: Bubbles
Replies: 7
Views: 290

Re: Bubbles

Thanks for your answers, I just wanted to explore a different solution than sending the item to Bresser, however I thinks that this is still the best thing to do.
by krakatoa1883
Sun Jan 10, 2021 4:43 pm
Forum: Commercial Solar Filters/Cameras/Hardware
Topic: Bubbles
Replies: 7
Views: 290

Bubbles

After only one year of use my Lunt B1200 BF developed bubbles and other defects in the cement between the elements, they are visibile as superimposed on the solar images and are very annoying. I am very disappointed because I always treated the filter with great care and my other B600 which is four ...
by krakatoa1883
Sun Jan 03, 2021 9:13 am
Forum: This is SolarChat !!
Topic: Sol from the last days of year 2020.
Replies: 11
Views: 151

Re: Sol from the last days of year 2020.

Wonderful images, Eric, absolutely great. May you share some infos about your old Daystar filter ?
by krakatoa1883
Sun Jan 03, 2021 9:05 am
Forum: This is SolarChat !!
Topic: Full disk 02-01-2021
Replies: 9
Views: 152

Re: Full disk 02-01-2021

Great discs, Rainer, Sun is very busy in Halpha light.
by krakatoa1883
Sun Dec 20, 2020 1:34 pm
Forum: This is SolarChat !!
Topic: Saturday sunshine 19th December 2020
Replies: 12
Views: 222

Re: Saturday sunshine 19th December 2020

Lovely images, Alexandra.

I too use a Chamaleon, what's the pattern suppressor you mentioned ?
by krakatoa1883
Wed Dec 09, 2020 11:46 am
Forum: This is SolarChat !!
Topic: Today's SUN (20201208) | LUNT60 (SS/DS)
Replies: 18
Views: 487

Re: Today's SUN (20201208) | LUNT60 (SS/DS)

Great solar discs, Pedro, a striking diffrence between SS and DS images.
by krakatoa1883
Wed Dec 09, 2020 11:42 am
Forum: This is SolarChat !!
Topic: ED80: do I ever need an ERF for it?
Replies: 7
Views: 254

Re: ED80: do I ever need an ERF for it?

A full aperture ERF is not needed but a good sub-aperture ERF is absolutely necessary. Forget UV/IR cut filters as they are not effective, a H-alpha filter of the type used for deep sky imaging is the minimum requirement to avoid long term degradation of the in-built BF. A 35nm Baader filter would w...
by krakatoa1883
Wed Dec 09, 2020 8:34 am
Forum: Solar Scope Modifications
Topic: G band instead of Ca-k filter
Replies: 48
Views: 1545

Re: G band instead of Ca-k filter

Sorry for being a pain. Would this work, can't find an exact 430nm. Andover Center Wavelength 430.7+0.4/-0.0 nm Bandwidth 2.0+0.5/-0.5 nm Transmission 45% Blocking 1x10-4 avg. X-Ray to FIR Size +0/-0.25mm Thickness 9.5 +0/-nom mm I have one purchased from the Andover dealer in Italy. It works fine,...
by krakatoa1883
Wed Nov 25, 2020 8:38 pm
Forum: This is SolarChat !!
Topic: Very active Sun of Nov 25
Replies: 14
Views: 324

Re: Very active Sun of Nov 25

Thanks for your comments.

Franco, I never observed the Sun so often as during the pandemic, working at home has some advantages indeed...
by krakatoa1883
Wed Nov 25, 2020 2:57 pm
Forum: This is SolarChat !!
Topic: Very active Sun of Nov 25
Replies: 14
Views: 324

Very active Sun of Nov 25

A clear and sunny day over Milan allowed me to image our star in fair seeing conditions. How long has it been since the last time we have been able to see so much activity on the Sun ? I can't remember, it seems that centuries have passed since then :lol: But further activity is expected in the next...
by krakatoa1883
Mon Nov 23, 2020 8:38 am
Forum: This is SolarChat !!
Topic: AR2783 November 21, 2020
Replies: 10
Views: 235

Re: AR2783 November 21, 2020

Fine images indeed, Franco, your Combo works really fine.
by krakatoa1883
Mon Nov 23, 2020 8:36 am
Forum: This is SolarChat !!
Topic: Sunday Sun 22nd November 2020 - AR2783 & FD
Replies: 14
Views: 293

Re: Sunday Sun 22nd November 2020 - AR2783 & FD

Great images, Stu, excellent work.
by krakatoa1883
Mon Nov 23, 2020 8:31 am
Forum: This is SolarChat !!
Topic: Today's SUN (20201122) | New AR
Replies: 5
Views: 262

Re: Today's SUN (20201122) | New AR

Great images, Pedro, very detailed. A large spot is approaching from E limb.
by krakatoa1883
Tue Nov 10, 2020 12:28 pm
Forum: This is SolarChat !!
Topic: New groups rotating from the SE limb
Replies: 5
Views: 207

New groups rotating from the SE limb

Spotted this morning, a white facular streak and a double spot, just on the limb.
by krakatoa1883
Tue Nov 10, 2020 12:01 pm
Forum: This is SolarChat !!
Topic: h-alpha disk, November 8th, 2020
Replies: 6
Views: 215

Re: h-alpha disk, November 8th, 2020

Great disc, very well processed