Any Bob Ebay ERF filters for CaK?

Frankenscope? Let's see it!***be advised that NOTHING in this forum has been safety tested and you are reading and using these posts at your own peril. blah, blah, blah... dont mess around with your eyesight when it comes to solar astronomy. Use appropriate filtration at all times...
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Brett
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Any Bob Ebay ERF filters for CaK?

Post by Brett » Sun Jul 26, 2015 7:22 pm

I have a Bob 2A CaK filter. I also have a broadband CaK filter that Mark here from SolarChat was kind enough to post to me. I have not had a chance to try them, but I was wondering if there are any ERF's on Bob's site for CaK.

I do realise that if I use with a small refractor (I will use with refractors less than 80mm), that an ERF probably would not be necessary. But I would like to play around with a couple of "cheaper" filters (Less than the Baader blue CCD filter) that do not cost an arm and leg. Will only be using with imaging, and don't get me wrong, by cheap I don't mean I'm planning on not to be safe.

Just wondering what is out there that I am not up to date with?

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Merlin66
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Re: Any Bob Ebay ERF filters for CaK?

Post by Merlin66 » Sun Jul 26, 2015 11:27 pm

Brett,
I found Bob's offerings were all 25mm diameter.....
When Oliver gets his next stock of the TriErf, that would be an option.
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marktownley
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Re: Any Bob Ebay ERF filters for CaK?

Post by marktownley » Mon Jul 27, 2015 5:29 am

Hi Brett, What sort of diameter are you looking at?
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http://brierleyhillsolar.blogspot.co.uk/
Solar images, a collection of all the most up to date live solar data on the web, imaging & processing tutorials - please take a look!

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DSobserver
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Re: Any Bob Ebay ERF filters for CaK?

Post by DSobserver » Mon Jul 27, 2015 10:38 pm

Merlin66 wrote: When Oliver gets his next stock of the TriErf, that would be an option.
Any idea when oliver will get them?

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Merlin66
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Re: Any Bob Ebay ERF filters for CaK?

Post by Merlin66 » Mon Jul 27, 2015 10:45 pm

No conformation as yet - hopefully soon.........
"Astronomical Spectroscopy - The Final Frontier" - to boldly go where few amateurs have gone before
https://groups.yahoo.com/neo/groups/ast ... scopy/info
"Astronomical Spectroscopy for Amateurs" and
"Imaging Sunlight - using a digital spectroheliograph" - Springer

Brett
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Re: Any Bob Ebay ERF filters for CaK?

Post by Brett » Tue Jul 28, 2015 1:55 pm

Mark, I am planning on a dedicated 60mm f/15 telescope for CaK. But it would be nice to use it now and then in the 127mm f/7.5 refractor as well.

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