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

Posted: Sat Mar 29, 2014 6:49 am
by Valery
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.

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

Posted: Sat Mar 29, 2014 6:50 am
by Valery
Here is 0,7A

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

Posted: Sat Mar 29, 2014 9:02 am
by marktownley
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?

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

Posted: Sat Mar 29, 2014 11:20 am
by Valery
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.

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

Posted: Sat Mar 29, 2014 5:22 pm
by pedro
Beautiful HR Ha images Valery

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

Posted: Sat Mar 29, 2014 9:39 pm
by Derek Klepp
An interesting comparison

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

Posted: Sat Mar 29, 2014 11:46 pm
by sullij1
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.

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

Posted: Sun Mar 30, 2014 6:15 am
by Valery
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.

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

Posted: Sun Mar 30, 2014 6:21 am
by Pragmatist
Wow, impressive images.

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

Posted: Sun Mar 30, 2014 6:56 am
by solar
:bow :bow :bow

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

Posted: Sun Mar 30, 2014 5:30 pm
by Montana
My ...! these are good :bow :bow :bow

Alexandra

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

Posted: Sun Mar 30, 2014 5:46 pm
by p_zetner
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.

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

Posted: Mon Apr 07, 2014 4:35 am
by swisswalter
Hi Valery


fantastic job. Thanks for sharing and explaining