If only that were true...... I am still trying to fathom how the resolution of a visually used binoscope with one eye looking into each eyepiece can be any more than that of each of the scopes on their own....
Like I said, if we were talking about a binoscope that transmitted the images of both mirrors into a single eyepiece, you would accept this immediately. Don't ask me how but observing e.g. close double stars or planets with one eye closed or with both eyes through a binoscope is a completely different thing. I guess it has something to do with both eyes having a better resolution than only one (e.g. like reading a text from a distance)... I don't know, but it's true.
Given the wide variation in subject brightness, size and form, it's probably foolhardy to try and pin things down to one value. But if one has to do so in order to give *some* idea, being a bit on the conservative side has merit.
Yes, I agree. But too conservative is also wrong and might make people believe that a binoscope (or even a pair of binoculars) isn't worth the cost and (especially) the hassle. Let's face it, if Zanewski were right, a binoscope would only capture 41% more light. Since it's generally considered that you need at least 30% more surface aperture in order to see a difference, a binoscope would be a ludicrous instrument, hardly delivering any visible benefit. And yet, when I close one eye, I observe a difference so large that it reminds me of the time that I got a 14,5" Dob iso my C8 (well, maybe that's a little exaggerated, but still...). The extra amount of light gathering power, faint little details suddenly appearing, no more need for averted vision... it's simply amazing and that's what everyone says, not just me who may sound biased. So I guess it's better that we leave those numbers for what they are and let people see for themselves. My door is always open to everyone...
PS: There's a chance that I may soon do a direct comparison with a 32" mono Dob. Now that will be a challenge!
Edited by PeterDob, 06 September 2017 - 11:13 AM.