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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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http://www.siebertoptics.com/SiebertOptics-2inchbinoviewers.html

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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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