1.25" Baader UV/IR on Quark as ERF?

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Brett
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1.25" Baader UV/IR on Quark as ERF?

Post by Brett » Sun May 22, 2016 12:33 pm

I have a Baader D Erf which I need to install internally into my 127mm refractor somehow and sometime. But was thinking of using my 1.25 inch Baader UV/IR filter with this refractor in the meantime. I cannot see how this would not work when screwed onto the Quark nosepiece. But everyone uses 2 inch UV/IR filters on the diagonal as ERF's.

Can I continue with my 1.25" filter or is there a problem that I will run into?

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marktownley
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Re: 1.25" Baader UV/IR on Quark as ERF?

Post by marktownley » Sun May 22, 2016 2:05 pm

It will work, it just means the energy in concentrated onto a much smaller spot than when a 2" is used on the nose of the star diagonal.
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Re: 1.25" Baader UV/IR on Quark as ERF?

Post by Brett » Sun May 22, 2016 4:12 pm

Thanks Mark. This is exactly what I thought. What do you propose the risks are? The baader UV is a reflection filter. So I'm assuming that it should easily handle the smaller focus point of heat by reflecting? The other consideration being the smaller focus point back to the objective. This may be a problem. Don't know...

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Re: 1.25" Baader UV/IR on Quark as ERF?

Post by marktownley » Sun May 22, 2016 7:05 pm

If you can put it on an extension nosepiece on the end of the quark it will handle things better.
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Re: 1.25" Baader UV/IR on Quark as ERF?

Post by Brett » Tue May 24, 2016 7:24 pm

Thanks Mark, I will do that.

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Re: 1.25" Baader UV/IR on Quark as ERF?

Post by GuillermoBarrancos » Thu May 26, 2016 7:45 pm

marktownley wrote:If you can put it on an extension nosepiece on the end of the quark it will handle things better.
But without using a diagonal I hope? :roll:

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Re: 1.25" Baader UV/IR on Quark as ERF?

Post by marktownley » Fri May 27, 2016 10:50 am

put the extension on the end of the diagonal, and then the filter on the extension.
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