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Author Topic: The 706nm TiO Filter  (Read 5274 times)

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Offline JohnM

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The 706nm TiO Filter
« on: 16:11:47, 19 April, 2011 »
Would any of you who have used this filter care to explain just what it is?
Ever since I heard about using this filter in WL imaging I've been searching around for information about it,
but still don't really understand what it does.
It's a very narrow band cut filter in the near IR?

Offline riklaunim

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Re: The 706nm TiO Filter
« Reply #1 on: 16:25:57, 19 April, 2011 »
706 nm narrowband filter like this one: http://cgi.ebay.co.uk/ws/eBayISAPI.dll?ViewItem&item=170175389328 mounted to this: http://cgi.ebay.co.uk/ws/eBayISAPI.dll?ViewItem&item=310260067802

It works similar to Baader Solar Continuum filter (or standard H-alpha), but in infrared band which is less affected by seeing than green in Baader filter.
SkyWatcher SCT 11" * Basler Ace, DSI III Pro * HEQ5 * and more
My website - new tutorials :)

Offline JohnM

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Re: The 706nm TiO Filter
« Reply #2 on: 16:37:22, 19 April, 2011 »
I've looked at it at Ebay. It's cheap enough, but I don't use Ebay since they went to requiring Paypal.
Is there someplace else to buy it?

Offline riklaunim

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Re: The 706nm TiO Filter
« Reply #3 on: 18:03:42, 19 April, 2011 »
Directly from the company, or someting in EU. Eureca.de has something similar but their filters are quite expensive. When I'll finaly get my astrosolar film for C11 I'm going to test some IR filters I have.
SkyWatcher SCT 11" * Basler Ace, DSI III Pro * HEQ5 * and more
My website - new tutorials :)

Offline JohnM

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Re: The 706nm TiO Filter
« Reply #4 on: 18:08:20, 19 April, 2011 »
I just read on CN that the filter can't be used with either version of the Baader film.
Only with a Herschel Wedge.
Since I don't have a Solar Wedge I guess I won't even worry about it.

Offline alexthegreek

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Re: The 706nm TiO Filter
« Reply #5 on: 08:15:52, 20 April, 2011 »
This is interesting !

Does anyone haqve any photos with this filter ?
Is there any special reaosn to shoot at 706 nm ?

Offline riklaunim

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Re: The 706nm TiO Filter
« Reply #6 on: 11:24:59, 20 April, 2011 »
It can be used. Is just that Baader astrosolar film is darker at around 700nm (ND5 works as ND5.5 at that spot). If the image won't be to dark - it works :) Why 706nm? As this is one of bands in which details are much clearer (like in Solar Continuum).

Proffesional observatories use such bands like:
Quote
G-band 430 nm, Ha 656 nm, TiO 706 nm, 1083 nm, 1.6 ?m, and 2.2 ?m

Also http://www.bbso.njit.edu/nst_gallery.html
"Amateur" TiO images are common on cloudynights in solar forum. I'm wondering if I could get some benefits of the 1083 nm band with RG1000 or Silicon window filters.
SkyWatcher SCT 11" * Basler Ace, DSI III Pro * HEQ5 * and more
My website - new tutorials :)

Offline JohnM

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Re: The 706nm TiO Filter
« Reply #7 on: 14:46:47, 20 April, 2011 »
I still don't really understand why the Baader films are affected at ~700nm, but I guess it is for some reason.
I have a variety of filters in the 500nm range that work well, so I guess I'll stay with them.

Offline riklaunim

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Re: The 706nm TiO Filter
« Reply #8 on: 15:03:11, 20 April, 2011 »
It looks like so:



The greater ND value the much darker it gets.
SkyWatcher SCT 11" * Basler Ace, DSI III Pro * HEQ5 * and more
My website - new tutorials :)

Offline alexthegreek

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Re: The 706nm TiO Filter
« Reply #9 on: 11:46:12, 21 April, 2011 »
It can be used. Is just that Baader astrosolar film is darker at around 700nm (ND5 works as ND5.5 at that spot). If the image won't be to dark - it works :) Why 706nm? As this is one of bands in which details are much clearer (like in Solar Continuum).

Proffesional observatories use such bands like:
Quote
G-band 430 nm, Ha 656 nm, TiO 706 nm, 1083 nm, 1.6 ?m, and 2.2 ?m

Also http://www.bbso.njit.edu/nst_gallery.html
"Amateur" TiO images are common on cloudynights in solar forum. I'm wondering if I could get some benefits of the 1083 nm band with RG1000 or Silicon window filters.


Thank you for the info .
I might also get one of these filters .I have the Baader ND3 foil .

Greetings from Zielona Góra

Offline alexthegreek

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Re: The 706nm TiO Filter
« Reply #10 on: 11:46:33, 22 April, 2011 »
Have you ised this filter with yor C11 ?

Such an aperure seems too big for Soalr imaging , because of the worse seeing during day .But since this filter is less affected by seeing is there any great benefit in using a 11" or 14" scope instead of a 5" one ?

Offline riklaunim

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Re: The 706nm TiO Filter
« Reply #11 on: 11:52:28, 22 April, 2011 »
I'll be using it with C11. And C11 + Sun is doable: http://www.bcsatellite.net/bao/granul29julqe.jpg
SkyWatcher SCT 11" * Basler Ace, DSI III Pro * HEQ5 * and more
My website - new tutorials :)

Offline alexthegreek

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Re: The 706nm TiO Filter
« Reply #12 on: 17:26:55, 22 April, 2011 »
Thanks a lot :)

Offline michaeloconnell78

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Re: The 706nm TiO Filter
« Reply #13 on: 22:04:26, 24 April, 2011 »
Thanks!
Just ordered one.
Regards,
Michael
www.astroshot.com
Gemini G41 Observatory+ Mount; 16" LX200 SCT, TEC140; Pentax75SDHF; PST CaK, PST Ha.

Offline alexthegreek

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Re: The 706nm TiO Filter
« Reply #14 on: 13:32:50, 05 May, 2011 »
I'll be using it with C11. And C11 + Sun is doable: http://www.bcsatellite.net/bao/granul29julqe.jpg


Hello again !
Have you found a full aperture solar filter for your C11 ?
I'm looking for one for 14" .

Thank you
 Alex

 

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