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  1. hopster

    Which binoculars are less stressfull for the eyes?

    That sounds a little patronising Paul. I know what I read, and what I meant. I should find the direct quote when I have time. I don't claim that CA improves an image - quite the opposite in fact - but an optical designer has said that it can be an inevitable by-product of going all out for...
  2. hopster

    Which binoculars are less stressfull for the eyes?

    I was simply relaying the quote from the optical designer about the relationship between sharpness and CA. I suspect they know something about their field and real world optical trade-offs.
  3. hopster

    Which binoculars are less stressfull for the eyes?

    There was another test done on this forum by one of the technically proficient people here who compared the lines on a test chart between SF and NV and decided that the lines had higher contrast on the NV. Again, I can't remember who or where but maybe someone else can. Someone also suggested...
  4. hopster

    Which binoculars are less stressfull for the eyes?

    There was a quote from an optical designer in this very forum, not sure I can find it now but others may know the source. A paraphrase (which may not be 100% accurate) is "the first thing that a new optical designer discovers when they create the sharpest possible optic is that CA increases"...
  5. hopster

    Which binoculars are less stressfull for the eyes?

    I find the Leica Noctivid 8x42 very easy to use with glasses once you get the eye cup positions just right, and an easy, crystalline view to enjoy over a period of time without eye strain from glare or other irritants. There is very occasionally a little CA on very high contrast object edges if...
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