The Charlie Bates Solar Astronomy Project is proudly sponsored by the following fine companies:
ImageImageImageImage
Image
Image
Transit of Mercury in the Spicule Layer. Phil took this great image with his Quantum 6 Scope, Solar Spectrum etalon and PGR Camera.

Welcome to Solar Chat! The best forum for Solar Astronomy
Moving forward from solar cycle 24 to 25

Two photos of the same group 0.7A and 0.5A. 150mm scope.

this is the main message area for anything solar :)
Post Reply
User avatar
Valery
Way More Fun to Share It!!
Way More Fun to Share It!!
Posts: 3350
Joined: Sun Nov 18, 2012 3:13 pm

Two photos of the same group 0.7A and 0.5A. 150mm scope.

Post by Valery » Sat Mar 29, 2014 6:49 am

March 24 I decided to compare how the solar surface will be seen through the same 150mm telescope equipped with
single stack 0,7A and double stack 0,5A.

Here are two these photos. 0,7A ones looks consisted more fine details, while 0,5A looks more relief defined.
Two reasons 0,7A has finer details: this bandwide has leak from the continuum and we can see some surface
details and exposure time is much shorter - better atmosphere freezing.
To improve details in 0,5A I need to remove one or both pre-filters on etalons.

Thanks for looking.

Valery Deryuzhin.
Attachments
24-03-14-11h-07-zv.jpg
"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
Valery
Way More Fun to Share It!!
Way More Fun to Share It!!
Posts: 3350
Joined: Sun Nov 18, 2012 3:13 pm

Re: Two photos of the same group 0.7A and 0.5A. 150mm scope.

Post by Valery » Sat Mar 29, 2014 6:50 am

Here is 0,7A
Attachments
24-03-14-12h-24-ss_zv.jpg
"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: 26434
Joined: Tue Oct 18, 2011 5:27 pm
Location: Brierley Hills, UK
Contact:

Re: Two photos of the same group 0.7A and 0.5A. 150mm scope.

Post by marktownley » Sat Mar 29, 2014 9:02 am

An excellent pair of comparison images valery, always a pleasure to see your shots. Definitely remove the pre filters on these etalons, what ERF do you use - front end full aperture or a sub aperture ERF in the tube?
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
Valery
Way More Fun to Share It!!
Way More Fun to Share It!!
Posts: 3350
Joined: Sun Nov 18, 2012 3:13 pm

Re: Two photos of the same group 0.7A and 0.5A. 150mm scope.

Post by Valery » Sat Mar 29, 2014 11:20 am

marktownley wrote:An excellent pair of comparison images valery, always a pleasure to see your shots. Definitely remove the pre filters on these etalons, what ERF do you use - front end full aperture or a sub aperture ERF in the tube?
Thaks Mark, I do use subaperture D-ERF applied on the front collimation lens.
"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.


Derek Klepp
Way More Fun to Share It!!
Way More Fun to Share It!!
Posts: 12685
Joined: Wed Oct 19, 2011 10:02 am

Re: Two photos of the same group 0.7A and 0.5A. 150mm scope.

Post by Derek Klepp » Sat Mar 29, 2014 9:39 pm

An interesting comparison

User avatar
sullij1
Way More Fun to Share It!!
Way More Fun to Share It!!
Posts: 2249
Joined: Wed Mar 28, 2012 4:29 am

Re: Two photos of the same group 0.7A and 0.5A. 150mm scope.

Post by sullij1 » Sat Mar 29, 2014 11:46 pm

Valery, beautiful details! Just a Photoshop suggestion, with such detail in the umbra in the .7 image, try masking in the umbra details from the .7 into the .5. This will get the best detail from both images. just a suggestion to make gorgeous images even better.
Look Up!

User avatar
Valery
Way More Fun to Share It!!
Way More Fun to Share It!!
Posts: 3350
Joined: Sun Nov 18, 2012 3:13 pm

Re: Two photos of the same group 0.7A and 0.5A. 150mm scope.

Post by Valery » Sun Mar 30, 2014 6:15 am

sullij1 wrote:Valery, beautiful details! Just a Photoshop suggestion, with such detail in the umbra in the .7 image, try masking in the umbra details from the .7 into the .5. This will get the best detail from both images. just a suggestion to make gorgeous images even better.
Joe, I am not familiar with all these PS tricks and, honestly, have not enough time to spend it for such images improvements. :^)

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
Pragmatist
The Sun?
The Sun?
Posts: 13
Joined: Fri Mar 28, 2014 6:42 pm
Location: Suffolk, UK

Re: Two photos of the same group 0.7A and 0.5A. 150mm scope.

Post by Pragmatist » Sun Mar 30, 2014 6:21 am

Wow, impressive images.
Lunt LS60THa. B1200. Pressure tuner. Solar searcher. Various eyepieces.

User avatar
solar
Way More Fun to Share It!!
Way More Fun to Share It!!
Posts: 2251
Joined: Sun Mar 24, 2013 7:13 pm

Re: Two photos of the same group 0.7A and 0.5A. 150mm scope.

Post by solar » Sun Mar 30, 2014 6:56 am

:bow :bow :bow
Vixen 130ss SolarMax 90 BF30 EQ6 Pro, LX200 12", C8 CG5, Megrez80, SBIG2000 MXC,

PGR 2.8 Grasshopper PGR Flea3, DMK21 ASI 120mm Lunt B1800 Cal-K + other stuff.

Skywatcher 150mm PST Mod2

User avatar
Montana
Way More Fun to Share It!!
Way More Fun to Share It!!
Posts: 21004
Joined: Mon Oct 17, 2011 5:25 pm
Location: Cheshire, UK

Re: Two photos of the same group 0.7A and 0.5A. 150mm scope.

Post by Montana » Sun Mar 30, 2014 5:30 pm

My ...! these are good :bow :bow :bow

Alexandra

User avatar
p_zetner
Almost There...
Almost There...
Posts: 959
Joined: Sun Mar 18, 2012 4:59 pm
Location: Winnipeg, Manitoba, Canada

Re: Two photos of the same group 0.7A and 0.5A. 150mm scope.

Post by p_zetner » Sun Mar 30, 2014 5:46 pm

Very beautiful and informative comparison, Valery.

What would (slightly) off-band imaging look like with the double stack (0.5 A)? High contrast with more photospheric detail?

Cheers.
Peter.

User avatar
swisswalter
Way More Fun to Share It!!
Way More Fun to Share It!!
Posts: 17951
Joined: Thu Feb 06, 2014 4:28 am
Location: Switzerland
Contact:

Re: Two photos of the same group 0.7A and 0.5A. 150mm scope.

Post by swisswalter » Mon Apr 07, 2014 4:35 am

Hi Valery


fantastic job. Thanks for sharing and explaining
Only stardust in the wind, some fine and some less fine scopes, filters and adapters as well. Switzerland 47 N, 9 E, in the heart of EUROPE :)

from 7 am - 7 pm http://www.nanosys.ch

from 7.01 pm - 6.59 am http://www.wastronomiko.com some times vice versa ;)

Post Reply