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dxdydz
member
Reged: 03/21/08
Posts: 42
Loc: Pittsburgh, PA
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I just ordered a PST Ha and I also have William Optics BinoViewers. Will I be able to bring them to focus or will I need an extension? If so, how long will I need the extension to be? I already have a 1" extension and a corrector that I use with my Dob. Any help would be appreciated. 
Thanks,
Jeff
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Coronado PST
Antares 10" Dob
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Jim7728
Postmaster
Reged: 04/10/05
Posts: 5147
Loc: Stoop Landing Observatory, NYC
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Don't think you will have any luck using a barlow.
You'll need a binoviewer corrector specific to the PST. Siebert makes such a corrector. I have the 1.3x OCA for the PST , works great with my BO binoviewer.
http://www.siebertoptics.com/SiebertOptics-H%20alpha.html
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Jim
TV-85~NP-127~12.5" dob project
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dxdydz
member
Reged: 03/21/08
Posts: 42
Loc: Pittsburgh, PA
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I also have a 1.3x OCA. But it is not made for the PST specifically. Will this make a difference?
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Coronado PST
Antares 10" Dob
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Jim Rosenstock
Post Laureate
Reged: 07/14/05
Posts: 4125
Loc: MD, south of the DC Nebula
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Quote:
I also have a 1.3x OCA. But it is not made for the PST specifically. Will this make a difference?
Call up Harry Seibert and ask him directly. He's very helpful. My guess is that he'll talk you through a way to make what you've got work for you, or he'll make you an offer you can't refuse on something that will!
Cheers,
Jim
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QUESTION AUTHORITY!
"errr....sez who??"
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dxdydz
member
Reged: 03/21/08
Posts: 42
Loc: Pittsburgh, PA
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Thanks Jim. I'll give it a try.
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Coronado PST
Antares 10" Dob
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Jim7728
Postmaster
Reged: 04/10/05
Posts: 5147
Loc: Stoop Landing Observatory, NYC
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Yes, if it's the same one I have it does not work with the PST. I tried it. See photo.
PST oca is on the left left.Small lens cell threads into nose of binoviewer. Binoviewer goes into adjustable extension tube and then into PST.
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Jim
TV-85~NP-127~12.5" dob project
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cocobolo
Carpal Tunnel
Reged: 10/27/07
Posts: 1550
Loc: british columbia, canada
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Jeff: I almost have what you have. My PST is here, the 1.3 OCA is on the way from Harry, and I have the same bino's as you do. As soon as it arrives, I'll let you know how it works. I expect it is going to be OK. I also have the variable barlow coming from Harry.
Keith
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dxdydz
member
Reged: 03/21/08
Posts: 42
Loc: Pittsburgh, PA
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Keep me posted. Thanks
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Coronado PST
Antares 10" Dob
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