25th March 2020 First light

this is the main message area for anything solar :)
Post Reply
User avatar
Montana
Librarian
Librarian
Posts: 21648
Joined: Mon Oct 17, 2011 5:25 pm
Location: Cheshire, UK

25th March 2020 First light

Post by Montana » Wed Mar 25, 2020 3:11 pm

Well, this morning dawned clear blue sky so I was set up and waiting ready for the Sun to hit the telescope. I did the usual three lights looking for polar faculae, this may take me days to analyse again but the seeing was good, not marvellous but good. So from 11am I had a play with the Celestron C11 and my PST mod. I had no idea what I was doing and didn't expect to see anything at all because first lights are usually disasters.

ImageCelestron C11 Halpha by Alexandra Hart, on Flickr

ImageCelestron C11 Halpha by Alexandra Hart, on Flickr

ImageCelestron C11 Halpha by Alexandra Hart, on Flickr

This is the view at native, is this normal?
Sun_112825_25_03_2020_lapl4_ap4379 a.jpg
Sun_112825_25_03_2020_lapl4_ap4379 a.jpg (522.05 KiB) Viewed 346 times
Anyway, the view through a 2.5x Powermate was much more like what I see from you guys and this gave me encouragement. I didn't even think I would find the Sun, let alone focus it so I was very pleased with myself. Obviously seeing wasn't the best over lunch time but this gives me some hope so I am pleased to bits.

ImageSun_115953_25_03_2020 by Alexandra Hart, on Flickr

ImageSun_115953_25_03_2020 f colour by Alexandra Hart, on Flickr

ImageSun_122842_25_03_2020 by Alexandra Hart, on Flickr

ImageSun_122842_25_03_2020 f colour by Alexandra Hart, on Flickr

Equipment: Celestron C11 / Aries full aperture ERF / 2.5x Powermate / PST etalon / ASI174

Alexandra

User avatar
rsfoto
Way More Fun to Share It!!
Way More Fun to Share It!!
Posts: 1484
Joined: Mon Jun 18, 2012 8:30 pm
Location: San Luis Potosi, México

Re: 25th March 2020 First light

Post by rsfoto » Wed Mar 25, 2020 3:14 pm

Hi,

Very good and yes it takes time to get adjusted a new set up.

I was astonished how long that optical train is behind the scope :shock:
regards Rainer

Observatorio Real de 14 San Luis Potosi Mexico

User avatar
marktownley
Librarian
Librarian
Posts: 27239
Joined: Tue Oct 18, 2011 5:27 pm
Location: Brierley Hills, UK
Contact:

Re: 25th March 2020 First light

Post by marktownley » Wed Mar 25, 2020 3:49 pm

Weird, my seeing was pants today. The native view is showing the PST sweetspot, looks like in that view you've got it tuned as an annulus instead of a central spot, you can see how it goes off band at the edges of the fov. Barlowing / powermating into this centre of this is normal fodder on a pst mod. Glad you got a result, did you manage to do a comparison with the SF100?
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
Montana
Librarian
Librarian
Posts: 21648
Joined: Mon Oct 17, 2011 5:25 pm
Location: Cheshire, UK

Re: 25th March 2020 First light

Post by Montana » Wed Mar 25, 2020 4:31 pm

Thanks guys :)

Mark, yes, those are coming slowly :)
Alexandra

Starry Jack
Im an EXPERT!
Im an EXPERT!
Posts: 429
Joined: Tue Feb 03, 2015 3:44 pm

Re: 25th March 2020 First light

Post by Starry Jack » Wed Mar 25, 2020 4:38 pm

There is going to be some gorgeous images coming from you soon! I can hunts of some really lovely high res features.
Explore Scientific 152mm f6.5 achromat
Aeries D-ERF
Quark Chromosphere f27 native, (f14 when focal reduced)
Mallincam .5x focal reducer (large format)
ZWO174 (IMX249 chip 5um)
Huge Sense of Adventure Viewing Creation

User avatar
JochenM
Almost There...
Almost There...
Posts: 589
Joined: Tue Dec 10, 2019 2:26 pm
Location: Belgium

Re: 25th March 2020 First light

Post by JochenM » Wed Mar 25, 2020 4:55 pm

Impressive looking setup there, Alexandra. And nice results as well!

PS: I can imagine that actually finding the sun with that thing is not that straightforward.

User avatar
DeepSolar64
Almost There...
Almost There...
Posts: 665
Joined: Thu Sep 05, 2019 12:19 am
Location: Edneyville North Carolina U.S.A.

Re: 25th March 2020 First light

Post by DeepSolar64 » Wed Mar 25, 2020 5:33 pm

Nice setup Alexandra!
Lunt 8x32 SUNoculars
Orion 70mm Solar Telescope
Celestron AstroMaster Alt/Az Mount
Meade Coronado SolarMax II 60 DS
Meade Coronado AZS Alt/Az Mount
Astro-Tech AT72EDII with Altair solar wedge
Celestron NexStar 102GT with Altair solar wedge
Losmandy AZ8 Alt/Az Mount
Traq 60mm with Baader AstroSolar film
Lunt, Coronado, TeleVue, Orion, Celestron and Sears eyepieces

Astrophil
Almost There...
Almost There...
Posts: 512
Joined: Thu Dec 20, 2018 2:00 am

Re: 25th March 2020 First light

Post by Astrophil » Wed Mar 25, 2020 6:06 pm

Coming along nicely, Alexandra. Fun and exciting times await you when the seeing improves. It only takes one great day to make it all worthwhile. You'll be ready.

Phil

User avatar
ffellah
Way More Fun to Share It!!
Way More Fun to Share It!!
Posts: 3259
Joined: Mon Oct 27, 2014 6:46 pm
Location: Westport, CT USA

Re: 25th March 2020 First light

Post by ffellah » Wed Mar 25, 2020 6:29 pm

Good first light, Alexandra. You will get great results soon with this set up.

Franco

User avatar
eroel
Way More Fun to Share It!!
Way More Fun to Share It!!
Posts: 5169
Joined: Mon Dec 19, 2011 10:45 pm
Location: México D.F.

Re: 25th March 2020 First light

Post by eroel » Thu Mar 26, 2020 2:50 am

Alexandra:
Beautiful setup, it takes time to tame it, so do not become impatient you will soon see spectacular results.
Best regards and keep healthy.
Eric.

User avatar
Carbon60
Way More Fun to Share It!!
Way More Fun to Share It!!
Posts: 6676
Joined: Wed Mar 07, 2012 12:33 pm
Location: Lancashire, UK

Re: 25th March 2020 First light

Post by Carbon60 » Thu Mar 26, 2020 6:49 am

Hi Alexandra,

When the seeing conditions improve you’ll get some fantastic images with this set up. I’ve found with mine if I add a red filter on the camera the contrast improves (I don’t know if this is an issue in your case). I alway use a PowerMate (2.5x or 5x depending on the conditions) as natural focal ratio imaging does not work so well. But then the idea is to use this for hi-res close views anyhow.

I always take and apply flats to eliminate dust bunnies, but then I also often apply a false flat during final processing to even out any gradients. Of course ‘seeing’ is the real killer, or maker, of excellent images. Some incredible sunspots wouldn’t go amiss either. :)

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: 3411
Joined: Sun Nov 18, 2012 3:13 pm

Re: 25th March 2020 First light

Post by Valery » Thu Mar 26, 2020 7:18 am

Hello Alexandra,

This is a good start. You can do this much easier and better if you will simplificate the etalon-filter-camera train.

See here how short and simple it can be.

adapter from PST etalon to telescope 2" visual back - adapter #1.

adapter 1 --> PST etalon with it's native lenses --> tube 140mm --> BF10 or BF15 --> barlow --> camera.

Total length is about 220mm only. Barlow magnification is depends of the camera pixel size and seeing. Not necessary to use too large focal length when you just trying to practice.
2x barlow shortened to screw-in in the nose of ASI174 camera is OK. It will give about 1,5-1,7x magnification and F/D=15-17 - absolutely enough for first experiments.

To adjust PST etalon for Ha better to make scale even smaller by binning 2x2. As Mark said already, you need to adjust PST etalon so that it will show a sweet spot of dark center with slow brightening of the sweet spot towards the outer edge.

This basically all.


Hope this helps.


Valery
Attachments
__Alexandra C14 example2.jpg
__Alexandra C14 example2.jpg (193.71 KiB) Viewed 271 times
"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.

Post Reply