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refractory
Pooh-Bah
Reged: 02/05/05
Posts: 1001
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Anyone been over to Amart- a 6 inch Maksutov binocular/binoscope. Needs deeper pockets than mine. 
Jess Tauber
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Joad
Wordsmith
Reged: 03/22/05
Posts: 11751
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In principle I really like the idea of such an instrument, but (help me out here, anyone) wouldn't the relatively narrow FOV of a MAK somewhat contradict the purpose of widefield binocular viewing?
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edwincjones
Post Laureate
Reged: 04/10/04
Posts: 4119
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I saw a photo of twin D&G 6" f15 scopes from the WSP set up as a binoscope which would give a little over 1 degree with 35mm panoptics. This would be a great planetary/lunar scope with 3D effect. The Maks would be simular. For the cost, weight, I would think a binoviewer would be more practical.
As I have said before, with my 100mm miyauchi I almost always the the 20x eps (2.4*) and rarely use the 37x (1.9*) because the wider FOV is just more enjoyable.
edj
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n w arkansas
Binocular, Solar, General Amateur Astronomy
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Art Fritzson
sage
Reged: 01/29/05
Posts: 314
Loc: Northern Virginia, USA
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Quote:
...which would give a little over 1 degree with 35mm panoptics
I'd just like to point out that it probably isn't practical to consider EPs like the 35mm Panoptic. That EP has an ouside diameter of about 37mm - so two of them would have a minimum IPD of 74mm and that's with no space between the eyepieces for other things - like a nose. I suspect that's why I've never seen a bino-viewer for 2" eyepieces. I think that would mean that you'd be limited to, say, a 32mm focal length with a Plossl like field of view - the maximum for a 1 1/4" eyepiece.
So, I'd have to agree with Joad, that it's probably not practical to get a binocular-like view out of these.
- Art
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2006 "Bagging on a Budget" Award for Excellence in Binocular Astronomy
Garrett 25x100 IF, Oberwerk 15x70, Celestron Noble 10x50, Meade 10x50 and 8x42 Travelviews
William Optics Zenithstar II 80mm APO
Teleport 10" - an incredible all-in-one Planetary/DSO/"Grab and Go"
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Teal'c
Indeed
Reged: 08/02/05
Posts: 3313
Loc: Johnson City, TN
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Quote:
Quote:
...which would give a little over 1 degree with 35mm panoptics
I'd just like to point out that it probably isn't practical to consider EPs like the 35mm Panoptic. That EP has an ouside diameter of about 37mm - so two of them would have a minimum IPD of 74mm and that's with no space between the eyepieces for other things - like a nose. I suspect that's why I've never seen a bino-viewer for 2" eyepieces. I think that would mean that you'd be limited to, say, a 32mm focal length with a Plossl like field of view - the maximum for a 1 1/4" eyepiece.
So, I'd have to agree with Joad, that it's probably not practical to get a binocular-like view out of these.
- Art
http://www.siebertoptics.com/SiebertOptics-2inchbinoviewers.html
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Etch-O-Sketch and an eraser. Although....the eraser dosn't work 
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EdZ
Professor EdZ
Reged: 02/15/02
Posts: 12158
Loc: Cumberland, R I , USA42N71.4W
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Quote:
Quote:
I'd just like to point out that it probably isn't practical to consider EPs like the 35mm Panoptic. That EP has an ouside diameter of about 37mm - so two of them would have a minimum IPD of 74mm and that's with no space between the eyepieces for other things - like a nose. I suspect that's why I've never seen a bino-viewer for 2" eyepieces. I think that would mean that you'd be limited to, say, a 32mm focal length with a Plossl like field of view - the maximum for a 1 1/4" eyepiece.
So, I'd have to agree with Joad, that it's probably not practical to get a binocular-like view out of these.
- Art
http://www.siebertoptics.com/SiebertOptics-2inchbinoviewers.html
Art's well made point is not lost. The 35 Pans still would not be usable in a 2" binoviewer by anyone with less than IPD = 74mm. That would be very few people indeed.
BTW, the Siebert units linked above will require use of special narrow 2" eyepieces to get the claimed minimum IPD of 55mm. Probably some other narrow 2" eyepieces on the market would work also. Worth mention, they cost nearly $2000 and current wait is one year.
True 2" binoviewers pricing:
40mm units $1795 All 2" for All scopes (2bino40)
45mm units $1995 All 2" for all scopes (2bino45)
Current wait is 1year. Call for additional information.
edz
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Teach a kid something today. The feeling you'll get is one of life's greatest rewards.
member#21
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Teal'c
Indeed
Reged: 08/02/05
Posts: 3313
Loc: Johnson City, TN
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I was just letting Art know that 2 inch versions do exist. It seemed that he was unaware of this.
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Etch-O-Sketch and an eraser. Although....the eraser dosn't work
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Art Fritzson
sage
Reged: 01/29/05
Posts: 314
Loc: Northern Virginia, USA
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Yes, I was. Thanks!
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2006 "Bagging on a Budget" Award for Excellence in Binocular Astronomy
Garrett 25x100 IF, Oberwerk 15x70, Celestron Noble 10x50, Meade 10x50 and 8x42 Travelviews
William Optics Zenithstar II 80mm APO
Teleport 10" - an incredible all-in-one Planetary/DSO/"Grab and Go"
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