Monday Sun 21st May

this is the main message area for anything solar :)
Post Reply
User avatar
Carbon60
Way More Fun to Share It!!
Way More Fun to Share It!!
Posts: 5465
Joined: Wed Mar 07, 2012 12:33 pm
Location: Lancashire, UK

Monday Sun 21st May

Post by Carbon60 » Mon May 21, 2018 6:10 pm

A few from this morning. The conditions weren't ideal and rapidly deteriorated during the session with variable seeing and clarity. Haze built pretty quickly, deteriorating image quality.

First up a hydrogen alpha FD. DS Lunt 60/2.5x Televue Powermate/acA1920-155um. Four pane mosaic.

Image20180521_Ha1_FD by Stuart Green, on Flickr

Then over to the blue end. CaK FD 72mm f6 refractor with Lunt B600 Cak module and 2.5x Powermate, same camera. Two panes.

Image20180521_CaK_FD_Mono by Stuart Green, on Flickr

Image20180521_CaK_FD_Colour by Stuart Green, on Flickr

Finally back to the red. 150mm/DS Lunt 35 mod. 2.5x Powermate. Close view of a little magnetic activity in the chromosphere.

Image20180521_Ha_150_35_1 by Stuart Green, on Flickr

Finally a prom shot using the same setup.

Image20180521_Prom1 by Stuart Green, on Flickr


Thanks for looking.

Stu.
Lunt LS60THa B1200 PTFT
150mm H-alpha Solar telescope with Lunt35 mod
DMK41, Basler acA1920-155
NEQ6 Pro-mount
Fluxgate Magnetometers (1s and 150s Cadence)
More images at http://www.flickr.com/photos/solarcarbon60/

User avatar
ffellah
Way More Fun to Share It!!
Way More Fun to Share It!!
Posts: 2166
Joined: Mon Oct 27, 2014 6:46 pm
Location: Westport, CT USA

Re: Monday Sun 21st May

Post by ffellah » Mon May 21, 2018 7:15 pm

All good but the last two are my favorites. Particularly the one before the last, the close-up of the surface. Beautiful detail and chromosphere drama....

Franco

User avatar
marktownley
Librarian
Librarian
Posts: 24476
Joined: Tue Oct 18, 2011 5:27 pm
Location: Brierley Hills, UK
Contact:

Re: Monday Sun 21st May

Post by marktownley » Mon May 21, 2018 8:18 pm

Great outcomes Stu!
Image
http://brierleyhillsolar.blogspot.co.uk/
Solar images, a collection of all the most up to date live solar data on the web, imaging & processing tutorials - please take a look!

User avatar
Carbon60
Way More Fun to Share It!!
Way More Fun to Share It!!
Posts: 5465
Joined: Wed Mar 07, 2012 12:33 pm
Location: Lancashire, UK

Re: Monday Sun 21st May

Post by Carbon60 » Tue May 22, 2018 5:49 am

Many thanks, Franco & Mark.

Stu.
Lunt LS60THa B1200 PTFT
150mm H-alpha Solar telescope with Lunt35 mod
DMK41, Basler acA1920-155
NEQ6 Pro-mount
Fluxgate Magnetometers (1s and 150s Cadence)
More images at http://www.flickr.com/photos/solarcarbon60/

User avatar
mattwastell
Way More Fun to Share It!!
Way More Fun to Share It!!
Posts: 4833
Joined: Tue Feb 14, 2012 9:35 am
Contact:

Re: Monday Sun 21st May

Post by mattwastell » Tue May 22, 2018 7:50 am

Super collection Stu - the mod close ups are really pleasing!
Matt Wastell



Look up, look good!



http://www.pbase.com/mattwastell

User avatar
Carbon60
Way More Fun to Share It!!
Way More Fun to Share It!!
Posts: 5465
Joined: Wed Mar 07, 2012 12:33 pm
Location: Lancashire, UK

Re: Monday Sun 21st May

Post by Carbon60 » Wed May 23, 2018 5:48 am

Many thanks, Matt.

Stu.
Lunt LS60THa B1200 PTFT
150mm H-alpha Solar telescope with Lunt35 mod
DMK41, Basler acA1920-155
NEQ6 Pro-mount
Fluxgate Magnetometers (1s and 150s Cadence)
More images at http://www.flickr.com/photos/solarcarbon60/

User avatar
Montana
Way More Fun to Share It!!
Way More Fun to Share It!!
Posts: 19754
Joined: Mon Oct 17, 2011 5:25 pm
Location: Cheshire, UK

Re: Monday Sun 21st May

Post by Montana » Thu May 24, 2018 6:41 am

Nice to see a hot spot on the disc, my favourite is the prom at the end :bow

Alexandra

User avatar
Carbon60
Way More Fun to Share It!!
Way More Fun to Share It!!
Posts: 5465
Joined: Wed Mar 07, 2012 12:33 pm
Location: Lancashire, UK

Re: Monday Sun 21st May

Post by Carbon60 » Fri May 25, 2018 6:44 am

Thanks, Alexandra. Hopefully more to come over the weekend.

Stu.
Lunt LS60THa B1200 PTFT
150mm H-alpha Solar telescope with Lunt35 mod
DMK41, Basler acA1920-155
NEQ6 Pro-mount
Fluxgate Magnetometers (1s and 150s Cadence)
More images at http://www.flickr.com/photos/solarcarbon60/

User avatar
Valery
Way More Fun to Share It!!
Way More Fun to Share It!!
Posts: 3045
Joined: Sun Nov 18, 2012 3:13 pm

Re: Monday Sun 21st May

Post by Valery » Sat May 26, 2018 2:54 am

Very nice series of images, Stu.

The images with the DS Lunt 35 is the most impressive.

BTW Do you plan to use this LS35 based filtering system with your 10" RC scope?

BTW. I am going to make LS35 mod myself. Can you please show the actual mechanical solution of this DS LS35?


Thanks,

Valery
"Solar H alpha activity is the most dynamic and compelling thing you can see in a telescope, so spend accordingly." (c) Bob Yoesle.

Largest full size 185 - 356mm Dielectric Energy Rejection Filters (D-ERF) by ARIES Instruments.

allhoest
Im an EXPERT!
Im an EXPERT!
Posts: 207
Joined: Sun Mar 22, 2015 7:48 pm

Re: Monday Sun 21st May

Post by allhoest » Sun May 27, 2018 9:24 am

Fine pics!
CS
Alex

User avatar
Carbon60
Way More Fun to Share It!!
Way More Fun to Share It!!
Posts: 5465
Joined: Wed Mar 07, 2012 12:33 pm
Location: Lancashire, UK

Re: Monday Sun 21st May

Post by Carbon60 » Sun May 27, 2018 7:52 pm

Many thanks, Alex.
Lunt LS60THa B1200 PTFT
150mm H-alpha Solar telescope with Lunt35 mod
DMK41, Basler acA1920-155
NEQ6 Pro-mount
Fluxgate Magnetometers (1s and 150s Cadence)
More images at http://www.flickr.com/photos/solarcarbon60/

User avatar
Carbon60
Way More Fun to Share It!!
Way More Fun to Share It!!
Posts: 5465
Joined: Wed Mar 07, 2012 12:33 pm
Location: Lancashire, UK

Re: Monday Sun 21st May

Post by Carbon60 » Sun May 27, 2018 8:08 pm

Valery wrote:
Sat May 26, 2018 2:54 am
Very nice series of images, Stu.

The images with the DS Lunt 35 is the most impressive.

BTW Do you plan to use this LS35 based filtering system with your 10" RC scope?

BTW. I am going to make LS35 mod myself. Can you please show the actual mechanical solution of this DS LS35?


Thanks,

Valery
Hi Valery,

For the 10" RCT I'm using a single stacked Lunt 35. The mechanism for holding this on the back end of the scope is shown below. The black tube houses the collimating lens (negative 300mm bi-concave, which I want to change for a plano-concave) which is inserted into the back of the RCT. The aluminium tube houses the Lunt35 using sets of retaining screws so that I can position it and align it accurately with the optical axis. Slots within the tube provide access to the thumb screw to tune the etalon. The front of this tube is threaded to match the rear of the RCT when the 2" holder is removed.
IMG_3686 (2).JPG
IMG_3686 (2).JPG (93.82 KiB) Viewed 604 times
For the 150mm/Lunt 35 mod, I mount the Lunt on the end of my refractor using rings mounted on a long dovetail bar which I've drilled and bolted to the focuser (this is from a Vixen 80mm refractor that was cannibalised for my original PST mod) The vixen focuser already had the receiving threaded bolt holes from new. The ring mounts again allow me to align the Lunt. Both etalons on the front of the Lunt are easily accessible in this configuration and can be 'clocked' relative to one another and tuned to achieve the best, most uniform, image. The red 'cup' shields the front etalon, but is not necessary and I'm planning to machine this off. However, as with the RCT, there is a tube attached to the red 'cup' which holds the collimating lens (negative 250mm plano-concave).
IMG_3685 (2).JPG
IMG_3685 (2).JPG (337.55 KiB) Viewed 604 times
I hope this helps.

BTW, I use a circular polarising filter between the two etalons to reduce reflections.

Stu.
Lunt LS60THa B1200 PTFT
150mm H-alpha Solar telescope with Lunt35 mod
DMK41, Basler acA1920-155
NEQ6 Pro-mount
Fluxgate Magnetometers (1s and 150s Cadence)
More images at http://www.flickr.com/photos/solarcarbon60/

User avatar
Valery
Way More Fun to Share It!!
Way More Fun to Share It!!
Posts: 3045
Joined: Sun Nov 18, 2012 3:13 pm

Re: Monday Sun 21st May

Post by Valery » Sun May 27, 2018 10:31 pm

Thanks a lot, Stu. This really helps.

Some more questions if I may.

1. When your native LS35THa etalon is tuned to the center of the H-a what is the gap between the
base and the etalon back plate at the thumb screw place ?

In my native LS35THa etalon the gap is zero. The etalon stays perfectly perpendicularly to the collimated beam.
I am wonder - at any weather and at the atmosphere pressure around 30" (760mm mercury column) the etalon stays at the CWL.
This makes sweet spot round and centered. My double stack LS35F has about 0,65mm to 0,7mm gap at thumb screw when tuned
to the CWL.

2. Which of your etalons is more contrasty and which is more bright?

My double stack etalon is more contrasty and more bright. Too bad it requires such a tilt to come to CWL.


Thanks,


Valery
"Solar H alpha activity is the most dynamic and compelling thing you can see in a telescope, so spend accordingly." (c) Bob Yoesle.

Largest full size 185 - 356mm Dielectric Energy Rejection Filters (D-ERF) by ARIES Instruments.

User avatar
marktownley
Librarian
Librarian
Posts: 24476
Joined: Tue Oct 18, 2011 5:27 pm
Location: Brierley Hills, UK
Contact:

Re: Monday Sun 21st May

Post by marktownley » Mon May 28, 2018 4:25 pm

Nice pics of the equipment stu
Image
http://brierleyhillsolar.blogspot.co.uk/
Solar images, a collection of all the most up to date live solar data on the web, imaging & processing tutorials - please take a look!

User avatar
Carbon60
Way More Fun to Share It!!
Way More Fun to Share It!!
Posts: 5465
Joined: Wed Mar 07, 2012 12:33 pm
Location: Lancashire, UK

Re: Monday Sun 21st May

Post by Carbon60 » Tue May 29, 2018 5:46 am

Hi Valery,

I'm not sure that I have sufficient experience with either setup at the moment to give you a definitive answer. I'm still tweaking the alignment and positioning of the Lunts which changes the tuning.

I'll keep an eye on things and get back to you once the equipment has settled down.

Stu.
Lunt LS60THa B1200 PTFT
150mm H-alpha Solar telescope with Lunt35 mod
DMK41, Basler acA1920-155
NEQ6 Pro-mount
Fluxgate Magnetometers (1s and 150s Cadence)
More images at http://www.flickr.com/photos/solarcarbon60/

User avatar
TheSkyBurner
Almost There...
Almost There...
Posts: 812
Joined: Sat May 05, 2018 7:55 pm
Contact:

Re: Monday Sun 21st May

Post by TheSkyBurner » Thu Nov 01, 2018 5:55 am

Carbon60 wrote:
Sun May 27, 2018 8:08 pm
Valery wrote:
Sat May 26, 2018 2:54 am
Very nice series of images, Stu.

The images with the DS Lunt 35 is the most impressive.

Thanks,

Valery
Hi Valery,

For the 10" RCT I'm using a single stacked Lunt 35. The mechanism for holding this on the back end of the scope is shown below. The black tube houses the collimating lens (negative 300mm bi-concave, which I want to change for a plano-concave) which is inserted into the back of the RCT. The aluminium tube houses the Lunt35 using sets of retaining screws so that I can position it and align it accurately with the optical axis. Slots within the tube provide access to the thumb screw to tune the etalon. The front of this tube is threaded to match the rear of the RCT when the 2" holder is removed.

IMG_3686 (2).JPG

For the 150mm/Lunt 35 mod, I mount the Lunt on the end of my refractor using rings mounted on a long dovetail bar which I've drilled and bolted to the focuser (this is from a Vixen 80mm refractor that was cannibalised for my original PST mod) The vixen focuser already had the receiving threaded bolt holes from new. The ring mounts again allow me to align the Lunt. Both etalons on the front of the Lunt are easily accessible in this configuration and can be 'clocked' relative to one another and tuned to achieve the best, most uniform, image. The red 'cup' shields the front etalon, but is not necessary and I'm planning to machine this off. However, as with the RCT, there is a tube attached to the red 'cup' which holds the collimating lens (negative 250mm plano-concave).

IMG_3685 (2).JPG

I hope this helps.

BTW, I use a circular polarising filter between the two etalons to reduce reflections.

Stu.
dude you have the exact information im looking for, thank you!

I have adapters for the ls50C etalon being manufactured for a mod just like this. Your result is totally stunning, many more thanks to you, STU!

:bow

Post Reply

Who is online

Users browsing this forum: No registered users and 12 guests