Want to buy CaK PST mod or original PST CaK

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Valery
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Want to buy CaK PST mod or original PST CaK

Post by Valery » Thu May 15, 2014 2:36 pm

Hi the solar friends,

I want to buy one of the following:

1. Main filter from the old PST CaK (this is the first of four filters in the PST CaK - so called "yellowing" glass. This one is the first filter in count from the
objective side.

2. Ready PST CaK mod.

3. Native PST CaK can be damaged. The only condition I assept is that the main "yellowing" filter (see 1.) is untouched and undamaged.

If you have something to offer, let me know what and how much.

Thanks in advance.


Valery.
Last edited by Valery on Sun May 18, 2014 1:47 am, edited 3 times in total.
"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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marktownley
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Re: Want to by CaK PST mod or original PST CaK

Post by marktownley » Thu May 15, 2014 3:31 pm

We all want one of these valery :P
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Valery
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Re: Want to by CaK PST mod or original PST CaK

Post by Valery » Thu May 15, 2014 11:57 pm

marktownley wrote:We all want one of these valery :P
Hah! I believe you already have enough of these filters for DS. Don't you? Or do you plan to go further and dive into even narrower CaK slit? :^)
Triple stack?
"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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swisswalter
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Re: Want to by CaK PST mod or original PST CaK

Post by swisswalter » Fri May 16, 2014 4:19 am

Hi Valery

good luck. If you find 3, please send one over to me
Only stardust in the wind, some fine and some less fine scopes, filters and adapters as well. Switzerland 47 N, 9 E, in the heart of EUROPE :)

from 7 am - 7 pm http://www.nanosys.ch

from 7.01 pm - 6.59 am http://www.wastronomiko.com some times vice versa ;)

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Valery
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Re: Want to by CaK PST mod or original PST CaK

Post by Valery » Fri May 16, 2014 7:10 am

Ok, Walter. I will just send you the link where to buy. :)

If seriously, if this will be too long, I better buy Lunt 18mm CaK wedge and stack it with CaKPST. Time is critical cause
the solar maximum is over or almost over. Better to work now than then just looking at the second CaKPST arrived with
no chances to be used anywhere soon.


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: Want to by CaK PST mod or original PST CaK

Post by solarchat » Fri May 16, 2014 9:47 am

there are plenty of beautiful features to see on the Sun all throughout the solar cycle. The whole premise that there is nothing to see during solar minimum is a "white light" old timers premise.
I wouldn't worry about the solar cycle calming down. its still breathtaking in narrowband every day.
Stephen W. Ramsden
Atlanta, GA USA
Founder/Director Charlie Bates Solar Astronomy Project
http://www.solarastronomy.org

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Re: Want to by CaK PST mod or original PST CaK

Post by marktownley » Fri May 16, 2014 9:55 pm

Valery wrote:
marktownley wrote:We all want one of these valery :P
Hah! I believe you already have enough of these filters for DS. Don't you? Or do you plan to go further and dive into even narrower CaK slit? :^)
Triple stack?
Theoretically, double stacking two 2.2a filters gives a bandwidth of 1.57a, triple stacking should give 1.29a, but, exposure would drop to levels that are not usable by (my) camera.

That is not to say I would not try triple stacking, in fact I this is already planned for the next swiss visit to see Walter ;)
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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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Re: Want to by CaK PST mod or original PST CaK

Post by swisswalter » Sat May 17, 2014 12:17 am

marktownley wrote:
Valery wrote:
marktownley wrote:We all want one of these valery :P
Hah! I believe you already have enough of these filters for DS. Don't you? Or do you plan to go further and dive into even narrower CaK slit? :^)
Triple stack?
Theoretically, double stacking two 2.2a filters gives a bandwidth of 1.57a, triple stacking should give 1.29a, but, exposure would drop to levels that are not usable by (my) camera.

That is not to say I would not try triple stacking, in fact I this is already planned for the next swiss visit to see Walter ;)

Hi Valery

welcome to switzerland, when do you arrive ?
Only stardust in the wind, some fine and some less fine scopes, filters and adapters as well. Switzerland 47 N, 9 E, in the heart of EUROPE :)

from 7 am - 7 pm http://www.nanosys.ch

from 7.01 pm - 6.59 am http://www.wastronomiko.com some times vice versa ;)

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Valery
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Re: Want to by CaK PST mod or original PST CaK

Post by Valery » Sat May 17, 2014 1:54 am

It was Mark, who is willing to jump to the Switzegland, not me, Walter! :)
I have no time to trip - - I am anxiously waiting for the QUARK Chromosphere
and for the EO 11nm filter for my CaK telescope .

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: Want to by CaK PST mod or original PST CaK

Post by swisswalter » Sat May 17, 2014 7:11 am

Hi Valery

thank you you are right. I hoped for both ;)
Only stardust in the wind, some fine and some less fine scopes, filters and adapters as well. Switzerland 47 N, 9 E, in the heart of EUROPE :)

from 7 am - 7 pm http://www.nanosys.ch

from 7.01 pm - 6.59 am http://www.wastronomiko.com some times vice versa ;)

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