My New BinChannel ERF

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ThomasHu
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My New BinChannel ERF

Post by ThomasHu » Mon Oct 29, 2018 2:46 pm

I booked a binchannel ERF from an optical engineer friend about 4 months ago.
And I got my new ERF's picture this morning.It's really beautiful.
The ERF was designed by 80% and above transmission near 393nm and 656nm.
BinChannelERF.jpg
BinChannelERF.jpg (87.64 KiB) Viewed 412 times
I'm preparing to use it with a C925HD and Quark(CaH and Ha) and hope to get some more suggestion from friends in this forum :)

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Re: My New BinChannel ERF

Post by TheSkyBurner » Mon Oct 29, 2018 4:26 pm

looks great !

christian viladrich
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Re: My New BinChannel ERF

Post by christian viladrich » Mon Oct 29, 2018 9:28 pm

Looks good !
Any idea of the optical quality ? Any transmission curve available ?
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Co-author of "Astronomie Solaire"
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ThomasHu
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Re: My New BinChannel ERF

Post by ThomasHu » Tue Oct 30, 2018 1:14 am

christian viladrich wrote:
Mon Oct 29, 2018 9:28 pm
Looks good !
Any idea of the optical quality ? Any transmission curve available ?
My friend told me that they choose 5 points for testing.
The report shows that the coating is well-distributed.The Ha channel is about 87~90% transmission and the Ca-K/H channel about 84~85%.
They made Ha-ERF for the research institutes in China but the first time to made a BinChannel ERF(maybe used by the school/club or personal more often)
Last edited by ThomasHu on Tue Oct 30, 2018 1:18 am, edited 1 time in total.

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Re: My New BinChannel ERF

Post by ThomasHu » Tue Oct 30, 2018 1:17 am

The diameter of this ERF is 8.5 inch. It may get f/11 with my C925HD,and with a 2x barlow to use the Combo Quark.
Maybe I need to get a focal reducer with them.

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Re: My New BinChannel ERF

Post by marktownley » Tue Oct 30, 2018 8:52 am

Looks good
Image
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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Valery
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Re: My New BinChannel ERF

Post by Valery » Tue Oct 30, 2018 12:03 pm

What is the thickness of the filter?
"Solar H alpha activity is the most dynamic and compelling thing you can see in a telescope, so spend accordingly." (c) Bob Yoesle.

Largest full size 185 - 356mm Dielectric Energy Rejection Filters (D-ERF) by ARIES Instruments.

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Re: My New BinChannel ERF

Post by ThomasHu » Tue Oct 30, 2018 12:59 pm

Valery wrote:
Tue Oct 30, 2018 12:03 pm
What is the thickness of the filter?

It's designed for 40nm FWHM~

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Re: My New BinChannel ERF

Post by Valery » Tue Oct 30, 2018 3:16 pm

ThomasHu wrote:
Tue Oct 30, 2018 12:59 pm
Valery wrote:
Tue Oct 30, 2018 12:03 pm
What is the thickness of the filter?

It's designed for 40nm FWHM~
You do mean it's spectal bandwidth. I asked the thickness of the glass itself. 6mm, 10mm or 12mm ?


Valery
"Solar H alpha activity is the most dynamic and compelling thing you can see in a telescope, so spend accordingly." (c) Bob Yoesle.

Largest full size 185 - 356mm Dielectric Energy Rejection Filters (D-ERF) by ARIES Instruments.

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Re: My New BinChannel ERF

Post by christian viladrich » Tue Oct 30, 2018 7:22 pm

40 nm FWHM in both Ca K and Ha is amazing. What far goes the blockage in IR ? 1000 nm ? 1200 nm ?

Any idea of the optical quality (P-V or rms wavefront) ?
Christian Viladrich
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http://www.astroplanetes.com/
Co-author of "Astronomie Solaire"
http://www.astronomiesolaire.com/

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Re: My New BinChannel ERF

Post by ThomasHu » Wed Oct 31, 2018 12:21 am

christian viladrich wrote:
Tue Oct 30, 2018 7:22 pm
40 nm FWHM in both Ca K and Ha is amazing. What far goes the blockage in IR ? 1000 nm ? 1200 nm ?

Any idea of the optical quality (P-V or rms wavefront) ?
2 bands,393nm and 656nm,40nm FWHM for each.
Maybe 1000 nm or 1050nm ,because I did not get any more information above 1050nm
P-V I have not any more information,but I think it's usable enough for me
Last edited by ThomasHu on Wed Oct 31, 2018 12:33 am, edited 3 times in total.

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Re: My New BinChannel ERF

Post by ThomasHu » Wed Oct 31, 2018 12:30 am

Valery wrote:
Tue Oct 30, 2018 3:16 pm
ThomasHu wrote:
Tue Oct 30, 2018 12:59 pm
Valery wrote:
Tue Oct 30, 2018 12:03 pm
What is the thickness of the filter?

It's designed for 40nm FWHM~
You do mean it's spectal bandwidth. I asked the thickness of the glass itself. 6mm, 10mm or 12mm ?


Valery
I'm sorry I don't use English very often and misunderstand your question.
I need to ask another friend who will make the extension ring for it.

ThomasHu
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Re: My New BinChannel ERF

Post by ThomasHu » Wed Oct 31, 2018 12:43 am

Valery wrote:
Tue Oct 30, 2018 3:16 pm
ThomasHu wrote:
Tue Oct 30, 2018 12:59 pm
Valery wrote:
Tue Oct 30, 2018 12:03 pm
What is the thickness of the filter?

It's designed for 40nm FWHM~
You do mean it's spectal bandwidth. I asked the thickness of the glass itself. 6mm, 10mm or 12mm ?


Valery
My friend replied me. It's 4.5mm

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Valery
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Re: My New BinChannel ERF

Post by Valery » Wed Oct 31, 2018 2:38 am

ThomasHu wrote:
Wed Oct 31, 2018 12:43 am
Valery wrote:
Tue Oct 30, 2018 3:16 pm
ThomasHu wrote:
Tue Oct 30, 2018 12:59 pm



It's designed for 40nm FWHM~
You do mean it's spectal bandwidth. I asked the thickness of the glass itself. 6mm, 10mm or 12mm ?


Valery
My friend replied me. It's 4.5mm
Thanks.
"Solar H alpha activity is the most dynamic and compelling thing you can see in a telescope, so spend accordingly." (c) Bob Yoesle.

Largest full size 185 - 356mm Dielectric Energy Rejection Filters (D-ERF) by ARIES Instruments.

ThomasHu
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Re: My New BinChannel ERF

Post by ThomasHu » Thu Nov 01, 2018 12:40 am

A Photo of the test report
20181101083850.jpg
20181101083850.jpg (11.54 KiB) Viewed 219 times

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