Page 1 of 1

Want to buy CaK PST mod or original PST CaK

Posted: Thu May 15, 2014 2:36 pm
by Valery
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.

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

Posted: Thu May 15, 2014 3:31 pm
by marktownley
We all want one of these valery :P

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

Posted: Thu May 15, 2014 11:57 pm
by Valery
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?

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

Posted: Fri May 16, 2014 4:19 am
by swisswalter
Hi Valery

good luck. If you find 3, please send one over to me

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

Posted: Fri May 16, 2014 7:10 am
by Valery
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.

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

Posted: Fri May 16, 2014 9:47 am
by solarchat
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.

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

Posted: Fri May 16, 2014 9:55 pm
by marktownley
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 ;)

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

Posted: Sat May 17, 2014 12:17 am
by swisswalter
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 ?

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

Posted: Sat May 17, 2014 1:54 am
by Valery
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.

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

Posted: Sat May 17, 2014 7:11 am
by swisswalter
Hi Valery

thank you you are right. I hoped for both ;)