walk on the surface of the sun on October 4th.

banjo · Post by **banjo** » Wed Oct 04, 2017 12:49 pm

Hello everyone,
a small walk on the surface of the sun on October 4th.
the clouds too quickly arrived to make the whole surface.
Paul
click on the link for video
https://vimeo.com/236737079

ffellah · Post by **ffellah** » Wed Oct 04, 2017 2:15 pm

A very nice surface image, Paul ! Great detail....

Franco

Carbon60 · Post by **Carbon60** » Wed Oct 04, 2017 7:43 pm

Nice swirling patterns with fine structures beautifully captured, Paul.

Stu.

bart1805 · Post by **bart1805** » Wed Oct 04, 2017 10:38 pm

Nice one Paul. I checked out your site to look at your Mod. What kind of Glasspath are you using?
Bart.

MapleRidge · Post by **MapleRidge** » Wed Oct 04, 2017 11:41 pm

Beautiful image Paul...well done

Brian

Post by **Montana** » Thu Oct 05, 2017 10:07 am

Very nice picture and I enjoyed the walk around on the video

Alexandra

banjo · Post by **banjo** » Fri Oct 06, 2017 7:49 am

Hello to all
thank you for your nice messages.
Bart. It's This one http://laclefdesetoiles.com/applanisseu ... ark-v.html

Paul

bart1805 · Post by **bart1805** » Fri Oct 06, 2017 1:39 pm

Thanks Paul! I just noticed that a 150 mm f8 Skywatcher is just a fraction heavier than my127 mm Bresser. So if I can catch one second hand I might give it a try.
Where did you mount the glass path? In the 2 inch nosepiece you screw in the etalon?
Thanks again, Bart.

banjo · Post by **banjo** » Fri Oct 06, 2017 3:39 pm

just before etalon

in connection 2 "Focuser --- >> etalon Pst
view towards the lens (150mm)

circlips house (bof)
view against the etalon Pst

Paul

bart1805 · Post by **bart1805** » Fri Oct 06, 2017 9:02 pm

Thanks Paul, hope I can ask you some other questions.
How did you calculate the distance between the glasspath and the etalon?
And how did you calculate the exact position of where in the light path the glasspath had to be positioned?
CS, Bart.

MapleRidge · Post by **MapleRidge** » Sat Oct 07, 2017 12:13 am

Hi Bart...

I am not that familiar with these correctors, and have read the detail on the Baader site.

I was wondering if they are serving as telecentric lens, or used to extend the focus to permit the modded filter to reach focus?

Thanks for the information on your system,
Brian

bart1805 · Post by **bart1805** » Sat Oct 07, 2017 10:04 am

Hi Brian,
I would use the 1,25x glass path to make the beam a f10 beam instead of a f8 beam. The front lens of the etalon provides a parallel collimated beam to the etalon. But it works when the light that enters the etalon is f10. So you have to go from f8 to f10. The difficult part for me is where to put the glasspath so that it does not work as an aperture stop. But Paul is the one who is definitely more of the expert here, it is his system.
Another way would be to remove the front lens of the etalon and put a 4x telecentric before it. But I have learned here that airspace etalons don't work that well in a telecentric beam.
Bart.

MapleRidge · Post by **MapleRidge** » Sat Oct 07, 2017 5:20 pm

Hi Bart and Paul...

The use to get to f10 makes sense for the PST etalon. Thanks for the update.

I wasn't paying attention to who made the posts on the thread, so I best thanks you both

Brian

Post by **marktownley** » Sun Oct 08, 2017 9:15 am

Looks good!

banjo · Post by **banjo** » Mon Oct 09, 2017 7:03 am

Hello everyone ,
I put the glasspath here because I did not see better results by sticking it against the front lens of the etalon.
this solution has been used for a long time by other astam here.
have a good day
Paul
sorry for my English

allhoest · Post by **allhoest** » Wed Oct 18, 2017 7:29 pm

I used this glasspath in front of my telecentric x4, to have a total equivalent of x5. Works well.
CS
Alex

bart1805 · Post by **bart1805** » Wed Oct 18, 2017 8:58 pm

Hi Paul, I allready found a relatively cheap 150mm F8 Skywatcher. So at the moment I am rebuilding it into a 150mm PST mod. And will use the same setup you described, so with the 1,25x Baader Glasspath. Thanks for showing me the way!
Bart.

walk on the surface of the sun on October 4th.

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