Thanks Terry, thanks Stu.

it is not normal or acceptable for such an expensive product Hi Victor, It's not normal, neither is it acceptable, sadly it is all too common (poor performance) from solar manufacturers in general :( Based on what you've said so far and how much you've persevered with getting the double stack right...

DeepSolar64 wrote: ↑

Tue Nov 24, 2020 9:51 pm

Mark, have you a link to it on YouTube yet?

https://www.youtube.com/watch?v=9f8ULLN ... c6JAAE4dOA

By a stroke of good luck a beautiful 130mm TMB refractor has come up that I can buy for a really good price. I’m a refractor addict. I’m tempted to purchase this and combine it with an ERF (Baader) and a H filter at the back. This way, if I wished, I could also use it at night (although that wouldn...

SimonWalsh wrote: ↑

Tue Nov 24, 2020 9:04 pm

100mm Tak.

I have a 100mm Tal Simon. With a decent focuser and tube rings on it is an excellent solar scope.

Mark

That's a cracking disk Rainer, thanks for sharing!

Superb images Franco! I get images like that with my HaT rarely, your seeing is better than mine.

Nice report James. The new active region is the largest since April 2019, cloud here today and work but hoping can get a look at it over the weekend.

That's a really nice collection of images Marty. Looks good at the obs.

Thanks Franco and Fabio, here's a shot of the active region and the departing limb.

active-regions-other-side-ha-bw by Mark Townley, on Flickr

Here's a good paper on G-Band http://articles.adsabs.harvard.edu//ful ... 3.000.html

Thanks Geoff!

Simple answer, no! G-Band imaging to be 'true' G-band needs to be considerably narrower, like Ha or CaK - ultra narrowband. The 430nm filter is effectively only a narrow band filter, where it benefits is the shorter wavelength gives increased resolution over 540nm. Hi Mark, ... where it benefits is...

Very good Marty!

Nice shots John!

Great movie! I love the subtle flow of material.

Very impressive indeed Pedro!

Very nice indeed Eric!

Hi All, Apologies if i'm not as busy on here of late, work is just sapping all my time, meaning while I can find the time for a quick scan of posts I don't have the opportunity to respond to all. So, if I haven't responded to your post don't take offence, i'm just struggling to fit everything in the...

Another thought, would stacking up with a double stack420nm CWL, 25mm Dia., Hard Coated OD 4.0 10nm result in a narrower band of 5nm or am I being really stupid. Simple answer, no! G-Band imaging to be 'true' G-band needs to be considerably narrower, like Ha or CaK - ultra narrowband. The 430nm fil...

Good plan!

Nice disks Alexandra!

Thanks everyone for your kind words and support.

Yes it would work, you might find you need a UV/IR filter with it too. I'd cut your teeth with the 80mm first rather than the c11.

Thanks everyone, i'll pop this in the reference library in a day or so time.