PST blocking filter specs.

Frankenscope? Let's see it!***be advised that NOTHING in this forum has been safety tested and you are reading and using these posts at your own peril. blah, blah, blah... dont mess around with your eyesight when it comes to solar astronomy. Use appropriate filtration at all times...
Post Reply
Robert Henry 1355
Ohhhhhh My!
Ohhhhhh My!
Posts: 99
Joined: Sun Jul 19, 2015 4:20 pm
Location: Walden NY

PST blocking filter specs.

Post by Robert Henry 1355 » Wed Jan 25, 2017 11:19 pm

Does anyone in this forum know the specifications of the Coronado PST bf5 blocking filter?
Thank you,
Bob

User avatar
Merlin66
Librarian
Librarian
Posts: 3122
Joined: Tue Dec 13, 2011 1:23 pm
Location: St Leonards, Australia
Contact:

Re: PST blocking filter specs.

Post by Merlin66 » Thu Jan 26, 2017 3:54 am

Bob,
Not sure what you are asking for....
The "original" blocking filter (without the ITF) is 6mm square and has a bandpass centred on Ha of less than 10A.
"Astronomical Spectroscopy - The Final Frontier" - to boldly go where few amateurs have gone before
https://groups.yahoo.com/neo/groups/ast ... scopy/info
"Astronomical Spectroscopy for Amateurs" and
"Imaging Sunlight - using a digital spectroheliograph" - Springer

Robert Henry 1355
Ohhhhhh My!
Ohhhhhh My!
Posts: 99
Joined: Sun Jul 19, 2015 4:20 pm
Location: Walden NY

Re: PST blocking filter specs.

Post by Robert Henry 1355 » Thu Jan 26, 2017 1:05 pm

Hi,Merlin66-
Thanks for your reply.Andover optics wanted to know the specs of the PST blocking filter because I asked them if they can make a custom 10mm BF for the PST so I can unscrew the stock 5mm BF to make more a space around the sun visually.

User avatar
marktownley
Librarian
Librarian
Posts: 24097
Joined: Tue Oct 18, 2011 5:27 pm
Location: Brierley Hills, UK
Contact:

Re: PST blocking filter specs.

Post by marktownley » Fri Jan 27, 2017 2:18 pm

Hi Robert,

Best and cheapest way (custom filters are EXPENSIVE!) is to buy a BF10, unscrew the 10mm element replace this for the 5mm element in the PST and then screw the 5mm element in the blocker body and resell as a BF5 blocker. You will recoup some of your money, would only cost a couple of hundred bucks overall.
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!

Robert Henry 1355
Ohhhhhh My!
Ohhhhhh My!
Posts: 99
Joined: Sun Jul 19, 2015 4:20 pm
Location: Walden NY

Re: PST blocking filter specs.

Post by Robert Henry 1355 » Fri Jan 27, 2017 5:58 pm

Thanks,again,Mark-
I was trolling the waters to see what was available,and as you have stated,the best way is to go your way. Not sure if getting thebf 10 is going to make enough of a difference in visually for the PST for the extra cash.
Best,
Bob

User avatar
marktownley
Librarian
Librarian
Posts: 24097
Joined: Tue Oct 18, 2011 5:27 pm
Location: Brierley Hills, UK
Contact:

Re: PST blocking filter specs.

Post by marktownley » Fri Jan 27, 2017 8:40 pm

That's the trouble! All these Ha systems are uniquely different. My advice would be to see if you can borrow and trial before buy potentially.

What's the sweet spot like in the PST you already have in terms of its placement in the blocking filter? What do you want to achieve?
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!

Robert Henry 1355
Ohhhhhh My!
Ohhhhhh My!
Posts: 99
Joined: Sun Jul 19, 2015 4:20 pm
Location: Walden NY

Re: PST blocking filter specs.

Post by Robert Henry 1355 » Sat Jan 28, 2017 12:28 am

Hi,Mark-
The sweet spot is just off center and to the right of the visual image. I would like more space around the sun,which would be more aesthetically nicer.
Bob

User avatar
solarchat
Site Admin
Site Admin
Posts: 3951
Joined: Sat Feb 01, 2014 3:10 pm
Location: Atlanta, GA USA
Contact:

Re: PST blocking filter specs.

Post by solarchat » Sat Jan 28, 2017 12:32 am

I think you would be way better off buying a larger scope with a BF10 or BF15 already in it. :)
Stephen W. Ramsden
Atlanta, GA USA
Founder/Director Charlie Bates Solar Astronomy Project
http://www.solarastronomy.org

Robert Henry 1355
Ohhhhhh My!
Ohhhhhh My!
Posts: 99
Joined: Sun Jul 19, 2015 4:20 pm
Location: Walden NY

Re: PST blocking filter specs.

Post by Robert Henry 1355 » Sat Jan 28, 2017 2:34 am

Hi,Stephen-
Thanks for your reply! I use a PST DS in tandem with a Quark Chromosphere on a Lunt Engineering 102ED f/7 refractor on a Minitower II and I love this setup,one for full disc,the other for hi-res closeup views.It is near perfec,BUT the small space around the sun is uncomfortable , I had a pre-Meade Coronado 60mm with 2 externally double stacks and it was great with a bf10. Sold it,regretted it,every time I think about it I grind my teeth.Do you have a bf10 you would part with,make a Corleonedealfor me that "I can't refuse".
Thanks or your help,and hope to see you at NEAF 2017 with all your cool toys.
Best,
Bob

FeroT
Ohhhhhh My!
Ohhhhhh My!
Posts: 62
Joined: Thu Oct 13, 2016 4:13 pm

Re: PST blocking filter specs.

Post by FeroT » Wed Feb 22, 2017 4:33 am

Hi Robert,
Andover makes a 12.5mm BF which is used in Daystar Quark Chromosphere and mounted on the front of the telecentric extender. The part number is 659FS02-12.5 it costs $157 . If you want a 25mm diameter of the same they have it for $233. It works perfectly for me with my Quark, Lunt LS50F Ha and PST!
Frank

User avatar
banjo
Im an EXPERT!
Im an EXPERT!
Posts: 230
Joined: Sat Sep 17, 2016 12:38 pm
Location: France

Re: PST blocking filter specs.

Post by banjo » Thu Feb 23, 2017 10:47 am

Hi Franck,
This reference of this filter is on the Andover catalog? or Quark
Paul
bresser/messier 150/1200 Mod -D-Erf 160mm intern-glasspath 1.25-etalon Pst barlow X2 ASI174
http://astropol.pagesperso-orange.fr/soleilbis/soleilen
sorry for my English translators google :mrgreen:

User avatar
DSobserver
Almost There...
Almost There...
Posts: 540
Joined: Sun Feb 19, 2012 2:36 pm
Location: FRANCE

Re: PST blocking filter specs.

Post by DSobserver » Fri Feb 24, 2017 7:25 pm


FeroT
Ohhhhhh My!
Ohhhhhh My!
Posts: 62
Joined: Thu Oct 13, 2016 4:13 pm

Re: PST blocking filter specs.

Post by FeroT » Sun Feb 26, 2017 2:28 am

Hi Paul,
It is on Andover Corporation website. Daystar doesn't claim that they use this filter, but when you look inside the Quark you find the data on the filter itself.

Frank

pawlik
The Sun?
The Sun?
Posts: 1
Joined: Mon Sep 14, 2015 6:57 pm

Re: PST blocking filter specs.

Post by pawlik » Tue Feb 28, 2017 10:29 am

FeroT,

I can not send you a message, please contact at pawel.stoklos@wp.pl

tnx

LTHB
Oh, I get it now!
Oh, I get it now!
Posts: 24
Joined: Thu Mar 03, 2016 7:31 pm

Re: PST blocking filter specs.

Post by LTHB » Sun Mar 05, 2017 5:55 pm

Hi Frank,

thanks for the information on the Quark blocking filter - just what I was looking for! I just checked on the Andover website: I do not find a filter numbered "659FS02-12.5", but "656FS02-12.5" and, more important, it costs $259 (not $157). The 25mm version I find costs $384 (not $233).

Is that just an minor typo and a hefty increase in prices - or am I looking in the wrong place?

Thanks,

Frank

User avatar
marktownley
Librarian
Librarian
Posts: 24097
Joined: Tue Oct 18, 2011 5:27 pm
Location: Brierley Hills, UK
Contact:

Re: PST blocking filter specs.

Post by marktownley » Sun Mar 05, 2017 6:20 pm

You definitely don't want a 659 filter, that's not Ha wavelength!
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!

LTHB
Oh, I get it now!
Oh, I get it now!
Posts: 24
Joined: Thu Mar 03, 2016 7:31 pm

Re: PST blocking filter specs.

Post by LTHB » Sun Mar 05, 2017 6:40 pm

Sure, that's why I suspected a typo in FeroT's post from Feb.22nd - still: 65% increase in prices within ten days sounded strange to me. But maybe that is it.

FeroT
Ohhhhhh My!
Ohhhhhh My!
Posts: 62
Joined: Thu Oct 13, 2016 4:13 pm

Re: PST blocking filter specs.

Post by FeroT » Fri Mar 10, 2017 5:38 am

Sorry for the typo :-(

FeroT
Ohhhhhh My!
Ohhhhhh My!
Posts: 62
Joined: Thu Oct 13, 2016 4:13 pm

Re: PST blocking filter specs.

Post by FeroT » Fri Mar 10, 2017 5:40 am

656.3nm Bandpass Filter, FWHM 1nm, 12.5mm dia. 656FS02-12.5 $157 Price is correct! Checked it today!

LTHB
Oh, I get it now!
Oh, I get it now!
Posts: 24
Joined: Thu Mar 03, 2016 7:31 pm

Re: PST blocking filter specs.

Post by LTHB » Fri Mar 10, 2017 9:15 am

Thanks for checking!

Still puzzling to me: I just checked myself again on the Andover webpage, and again I get $259 for the 12.5mm filter and $384 for the 25mm version (see attachment).

And then I tried the same Andover webpage with a different browser that hides my (german) IP address: Now, surprise, surprise, I see the prices you quoted, i.e. $157 and $233 for exactly the same filters.

So, Andover filters seem to be 65% more expensive when ordering from Europe (?).
Attachments
Screenshot Andover.pdf
(135.17 KiB) Downloaded 43 times

FeroT
Ohhhhhh My!
Ohhhhhh My!
Posts: 62
Joined: Thu Oct 13, 2016 4:13 pm

Re: PST blocking filter specs.

Post by FeroT » Fri Mar 10, 2017 11:04 pm

Yes it could be the case. Maybe they are including the shipping and insurance cost, but I doubt it. This is price politics, unfortunately. That was a reason while I was living in New Zealand to buy a C8 with the mount and take in my luggage during my trip to US to save money. The NZ price was unacceptable.

User avatar
marktownley
Librarian
Librarian
Posts: 24097
Joined: Tue Oct 18, 2011 5:27 pm
Location: Brierley Hills, UK
Contact:

Re: PST blocking filter specs.

Post by marktownley » Sat Mar 11, 2017 7:44 am

LTHB wrote:
Fri Mar 10, 2017 9:15 am
And then I tried the same Andover webpage with a different browser that hides my (german) IP address: Now, surprise, surprise, I see the prices you quoted, i.e. $157 and $233 for exactly the same filters.

So, Andover filters seem to be 65% more expensive when ordering from Europe (?).
Useful to know, so the trick would be to order using a browser that blocks the IP address ;)
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!

User avatar
Merlin66
Librarian
Librarian
Posts: 3122
Joined: Tue Dec 13, 2011 1:23 pm
Location: St Leonards, Australia
Contact:

Re: PST blocking filter specs.

Post by Merlin66 » Sat Mar 11, 2017 8:00 am

They will probably catch you when you enter your shipping address. ;-)
"Astronomical Spectroscopy - The Final Frontier" - to boldly go where few amateurs have gone before
https://groups.yahoo.com/neo/groups/ast ... scopy/info
"Astronomical Spectroscopy for Amateurs" and
"Imaging Sunlight - using a digital spectroheliograph" - Springer

User avatar
marktownley
Librarian
Librarian
Posts: 24097
Joined: Tue Oct 18, 2011 5:27 pm
Location: Brierley Hills, UK
Contact:

Re: PST blocking filter specs.

Post by marktownley » Sat Mar 11, 2017 8:14 am

Merlin66 wrote:
Sat Mar 11, 2017 8:00 am
They will probably catch you when you enter your shipping address. ;-)
True! :D
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!

Post Reply

Who is online

Users browsing this forum: No registered users and 2 guests