Oxydized

Use this section to discuss "standard" Baader/Coronado/ Lunt SolarView/ Daystar, etc… filters, cameras and scopes. No mods, just questions/ answers and reviews.
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rsfoto
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Oxydized

Post by rsfoto » Sat Jul 28, 2012 12:22 am

Hi,

This is my second oxydized BF30 from Coronado.



¿ Is there a way to avoid this oxydizing ?

Glue a Ha or UV/IR filter in front of it ? but looking at the transmission curve I made from the Coronado ERF UV/IR is already blocked ...

BTW, my newest BF 30 is by far not that red when looking at the Sun through it as the one showed in the image ¿?

Thanks for any tips.
regards Rainer

Observatorio Real de 14 San Luis Potosi Mexico

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Re: Oxydized

Post by solarchat » Sat Jul 28, 2012 12:53 am

desiccant caps have kept all 12 of my BFs rust free for years. If you leave it out in he telescope with no protection it rusts.
Stephen W. Ramsden
Atlanta, GA USA
Founder/Director Charlie Bates Solar Astronomy Project
http://www.solarastronomy.org

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Re: Oxydized

Post by colinsk » Sat Jul 28, 2012 1:40 am

It is hard to tell if luck or planning keeps BFs safe. I keep mine open in a 50% humidity place. I have not had problems. However, I have never seen a green blocking filter!
Thank you, Here are some references I have collected.



Etalon Article Part I

Etalon Article Part II

Solar Patents of interest

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Re: Oxydized

Post by rsfoto » Sat Jul 28, 2012 4:42 pm

THank you Stephen and Colin :bow:

The BF 30 is permanently mount on the scope and the scope when not in use is under the roof of the Observatory.

Here where my Obervatory is I have during 80% of the time less then 40% humidity ¿?

The green colour of the oxid is probably due to the cheap camera I used. It has a nice Orange colour when looked at.
regards Rainer

Observatorio Real de 14 San Luis Potosi Mexico

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Re: Oxydized

Post by colinsk » Sun Jul 29, 2012 1:31 am

I have an orange BF-15. I would love to fix it...
Thank you, Here are some references I have collected.



Etalon Article Part I

Etalon Article Part II

Solar Patents of interest

poita
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Re: Oxydized

Post by poita » Tue Jul 31, 2012 6:55 am

The B600 also can have issues. Check this out.

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Re: Oxydized

Post by rsfoto » Tue Jul 31, 2012 4:09 pm

The B600 also can have issues. Check this out.

I'm not happy...

Hi Peter,

What :silly: is that ?
regards Rainer

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Re: Oxydized

Post by poita » Wed Aug 01, 2012 12:53 am

That is the B600 on the 'Working perfectly and giving great views of the sun' Lunt 60 I just purchased. :dry:

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Re: Oxydized

Post by solarchat » Wed Aug 01, 2012 12:55 am

I have heard nothing but bad from people buying used solar scopes.
Stephen W. Ramsden
Atlanta, GA USA
Founder/Director Charlie Bates Solar Astronomy Project
http://www.solarastronomy.org

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Re: Oxydized

Post by rsfoto » Wed Aug 01, 2012 1:11 am

I have heard nothing but bad from people buying used solar scopes.

Hi Stephen,

I do not understand that as all my equipment is purchsed new. First I bought a DS60 and 2 BF30 from Coronado and then already 2 BF30 from Meade/Coronado ...

:?
regards Rainer

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Re: Oxydized

Post by solarchat » Wed Aug 01, 2012 1:14 am

a reply to poita's post

"That is the B600 on the 'Working perfectly and giving great views of the sun' Lunt 60 I just purchased. "
Stephen W. Ramsden
Atlanta, GA USA
Founder/Director Charlie Bates Solar Astronomy Project
http://www.solarastronomy.org

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Re: Oxydized

Post by poita » Wed Aug 01, 2012 1:21 am

I'm hoping the seller will come good with something, I am talking to Lunt as apparently this was a known problem with the coating failing on early B600 filters.
I'm hoping I will get a resolution.

I really want to purchase a B1200 anyway, so I am just hoping the rest of the scope works okay...

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