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Screen Shot 2019-12-06 at 8.18.28 PM.png Welcome to the repository for all of the Yahoo List posts on the ASTRO IIDC forum Click here http://www.stephenramsden.com/AstroIIDCYahooRepositoryFolder/AstroIIDCYahooRepository.html to go to a searchable web page where you can look up anything from past po...

Tuning the etalon moves the filter centerline wavelength to compensate for the refractive index of the air in your locale at different air pressures. It will not change the color. It may change the brightness a bit. If you saw something on youtube that changed color, it was because they were trying ...

Thanks to last minute donations to our STEM nonprofit-including one massive anonymous donation from the UK-:)--we made our goal and the grand prize will be awarded today! Thank you to anonymous, Peter Scherff, Matt Harbison, Bojan Scepanovic, Christine Woods, Shawn Johnson, Margaret Carden, Ginie Ab...

paypal.me/CBSAP


We are at $8,700 of our $10,000 goal. Please consider a donation to help support this forum and our global nonprofit.

Welcome to the group! Whenever you add a second etalon to a hydrogen alpha scope, you reduce the brightness by 40% as you narrow the passband of the scope.
While the ERf may be removed, it won’t make any noticeable difference.

4 days left in our Fall fundraiser for Sunlit Earth!/CBSAP. We are at $8,450 of our $10,000 goal for funding the STEM nonprofit for 6 months.
Please consider a one time or monthly donation at paypal.me/CBSAP!

We spread science and art opportunities to a starving public. thanks!!

With one week left in the Fall fundraiser for Sunlit Earth!/CBSAP, we are at $7800!! of our $10k goal to support Solar science through our global nonprofit. You might even win a full astronomy/astrophotography telescope and mount setup from Skywatcher USA! Please consider supporting us by a one time...

Half way through the Fall fundraiser and we are at $7200 of the $10k goal! The Grand Prize Skywatcher USA EQM mount/100mm ED APO scope arrived today from our great friends at Skywatcher USA and will be awarded to one lucky donor if we reach our goal by Oct 30th! donate directly to info@charliebates....

Okay, the first week is in the books and we are at $3200 in the Charlie Bates Solar Astronomy Project/Sunlit Earth! fundraiser. The goal is $10,000 by the end of October. Thank you so much Earl Foster, Filip Szcerek, Bojan Scepanovic, Prof. Pedro Re, James W. Ambrister, Lissie Stahlman, Ben Kennedy,...

Thanks Frank!

Welcome to our 2019 Fall Fundraiser for the Charlie Bates Solar Astronomy Project/Sunlit Earth! . Our goal this year is $10,000(US) to be used to run our various internet forums, pay the <4% admin expenses of running the nonprofit, purchase and distribute equipment sponsorships around the world, mai...

Since donations to Sunlit Earth /CBSAP have been flat and are down about 60% from years previous, ill probably be selling the following items and donating the proceeds to the nonprofit. All of these items have scuffs, all work perfectly and some don’t have cases. Serious inquiries only. Prices are s...

Thanks to the 15 donors from Solarchat during our recent fundraiser we have been able to pay the $1900 required to extend the web hosting, domain name, and SSL certificate for three years. Now, as long as there are no problems from the hundreds of thousands of daily hackers attempting to get in, we ...

I love the design and the innovation of these quarks. I had one in magnesium, one in CaH, one in sodium and two in hydrogen alpha but I could never get any of them to really show a decent view. I still have a camera Quark that I really want to work hut it never shows much except a red solid ball. I ...

This sales forum is not regulated in any way by any of the moderators. If you decide to buy something on this forum from another member it is solely your responsibility to make sure you are getting the product advertised and all needed accessories. Unfortunately, there are a couple unscrupulous peop...

Well, two days left in our fundraiser for Sunlit Earth! and CBSAP and we are just under $6000 of our $15,000 goal. This will probably be the third year in a row we have not met the goal after 4 years of exceeding much higher goals. Sign if the times I guess. Anyway, We shall continue in helping peop...

We are just under $5,000 on our way to the goal of $15,000 for the Charlie Bates Solar Astronomy Project 2019 fundraiser. There are 8 days to go. It ends on April 30th. The SolarChat Forum (largest solar astronomy forum on the internet), Sunlit Earth!, Charlie Bates Solar Astronomy Project, live ast...

Please contribute to our nonprofit STEM fundraiser for the Charlie Bates Solar Astronomy Project/Sunlit Earth at PayPal.me/CBSAP Thank you NEAF!!, Bluebell Internet Services, Michelle Hamner, Dale Thieme, Tom Bramwell, Eric Roel, and Christopher Ball, Rainer Elhert, Dale Thieme, and of course, Alexa...

Thanks for all the friendly Solarchat! members that came up and said hello! What a wonderful weekend for solar.

this is the scope I donated to Rob Black, btw. I cant control what people do with the opportunities we give them, unforunately

Thank you to the 3 donors to the fundraiser so far. !

Lets get the ball rolling here folks. Thousands of users.

Okay, here we go! 2019 CBSAP/SUNLIT EARTH FUNDRAISER!! Beginning today, we start a fundraiser to continue the international efforts of the Charlie Bates Solar Astronomy Project and the local and national efforts of Sunlit Earth. When I stopped, post great American eclipse, doing public schools after...

That all looks set up correctly to me. Of course, as others have said there are no features of significance to view on the sun and you would never see granulation in the Sun’s chromosphere, only in the photosphere with white light. I’ve only used a quark a few times but to be honest I have never got...

I have a little different take on that. I would say if you were going to be imaging the sun and CaK or H-alpha with the scope, there is no need for a triplet and in my experience a much less expensive doublet performs identically since there is only one wavelength of light to focus. Of course, if yo...