Thanks to all !
Today was no good. We hope to-morow will be better.
Best wishes

Dear All, Nice seeing condition this morning at St Véran (2930 mm) with the Newton 300 mm. This image was taken with an Andover 396 - 5 nm which appears to give excellent results. More to come in the next days. http://www.astrosurf.com/viladrich/astro/soleil/wl/2019/13August2019-8h16minUT-N300-396-5...

Dear All, Here are two images taken in Ha of one of the very small "active "region visible on August 6. The first one is at F/27 : http://astrosurf.com/viladrich/astro/soleil/wl/2019/Ha-6August2019-8h27minUT-C8-B1920.jpg I tried F/35 for the second one (I was very ambitious ...) with resize 85%. The...

Thanks to all :-)
With the activity so low, I kind of like the polar regions.

Nice to see some activity again, and pretty good images !

It's quite good for 110 mm !

Nice images Mark !

Well done Josef. The resolution is excellent !
Christian

Hello Franck,
You might try to install a thermal probe next to the mirror. You could then check whether this is an issue with tube turbulence.
Best regards
Christian

Nice proms Lou,
You are ready for the big one :-)
Best regards
Christian

Maybe, have a look at Telescope Service, they have a lot of adapters. I have not checked whether they have that one.
Best regards
Christian

Hello Stu,
This is an excellent set of images. The Ca K at full aperture is quie good !
Best regards
Christian

Hello Eric,
This is a beautiful FD image. Incredible what a 40 mm DS can do.
Christian

Dear all, As often said by Valery, aperture gives us access to some details even when there is no detail on the solar disk :-) Here are two images taken this morning (it was so hot ...). Somewhere near the middle of the solar disk : http://astrosurf.com/viladrich/astro/soleil/wl/2019/Ha-4August2019-...

Hello,
I am looking for a Lumicon prominence solar filter.
Thanks !
Christian

Hello Ronnie,
We are still on track for next Christmass :-)
Best regards
Christian

I love these old plates. Well done !

Hello Bart,
I like your filter support system :-)
I have made no progress on my side since I was busy on other things. I've got to get into this in June.
BTW, did you observe any temperature issue with the filter ?
Best regards
Christian

So did you find a significant improvement ?

Thanks guys :-)

The F/35 gives a narrower effective bandpass. The effective bandpass of a 0.3 A filter is about 0.5A at F/27 and 0.4A at F/35 :

I have a test image comparing both F-ratio somewhere on my website.

Excellent indeed !

Beautifull images and processing !

Nice set of images ! You can probably remove the 0.7 reducer next time.

Well done Christophe !
It looks as if the large prominence on the limb has some connection with some of the filaments from the sunspot ?

Well done Bart !
Is it with the change of distance between the lenses ?