asaint
Carpal Tunnel
Reged: 04/25/03
Posts: 2021
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Resonant Spaces
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highfnum
super member
Reged: 09/06/06
Posts: 104
Loc: NY
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Nice Overview
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alanon
Pooh-Bah
Reged: 06/29/07
Posts: 1248
Loc: Las Vegas, NV
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A very informative and interesting article! Thanks Colin.
--------------------
Alanon the Wizard
(Dan)
12.5" Obsession #1531
WO ZenithStarII 80mm ED
Coronado PST Ha
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colinsk
Pooh-Bah
Reged: 01/17/08
Posts: 1227
Loc: CA
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Thank you! A printable version can be found here:
http://www.designerinlight.com/solar/EtalonArticlePt1.pdf
--------------------
Mahalo,
Colin Kaminski
Coulter 10.1" Dobsonian
PST
TV-76/Baader White Light Filter/LS50F/BF1200
LS60T/DS50/FT/BF1200
DSM
LXD-75
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JerryWise
Postmaster
Reged: 12/26/03
Posts: 6875
Loc: Lexington, SC
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Excellent work. I really enjoyed reading it. I always wondered how my PST worked.
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Jerry
LX200ACF 14", Tak FS 152 & TOA 150
AP-1200 & Mach1
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PeteH
professor emeritus
Reged: 12/03/05
Posts: 549
Loc: Cypress, Texas
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Excellent article - well written and a very interesting topic.
-Pete
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Dennis Dickerson
newbie
Reged: 06/10/05
Posts: 4
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Not only is this great information, but raises some interesting questions around the new systems that Lunt Solar Systems will be bringing to the market. I had to wonder when I read about the second circle of spacers in the etalon that are placed in the field of view. Won't this reduce contrast, by acting similarly to the secondary in a Newtonian? In some sense it would also seem to reduce the 10mm advantage in aperture that the 100mm Lunt systems have over the 90mm SolarMax refractors. I realize that the extra 10 mm in aperture has to translate to an increase in resolution, but the obstruction would seem to be a concern in a telescope that needs to avoid scattered light to perform optimally on the sun. I have an LS200T on pre-order, so this article gave me a lot to ponder.
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colinsk
Pooh-Bah
Reged: 01/17/08
Posts: 1227
Loc: CA
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I don't think the LS200 will have any obstructions in the etalon. But, of course, it has the diagonal mirror obstruction.
I agree that contrast is key and Andy has a lot to prove with the new large front aperture etalons. I expect in about 2 months we will start getting first hand reports.
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Mahalo,
Colin Kaminski
Coulter 10.1" Dobsonian
PST
TV-76/Baader White Light Filter/LS50F/BF1200
LS60T/DS50/FT/BF1200
DSM
LXD-75
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asaint
Carpal Tunnel
Reged: 04/25/03
Posts: 2021
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Article has been updated with larger pictures so you can read the inserted captions.
Thanks
Allister
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colinsk
Pooh-Bah
Reged: 01/17/08
Posts: 1227
Loc: CA
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Thank you Allister!
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Mahalo,
Colin Kaminski
Coulter 10.1" Dobsonian
PST
TV-76/Baader White Light Filter/LS50F/BF1200
LS60T/DS50/FT/BF1200
DSM
LXD-75
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