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  1. M

    Astigmatism as an Aberration in Optics

    Were they pulling my leg then ? What do you call it when the focus is slightly (and I mean slightly) off in rings around the center. For example in this photo I was able to capture some of it having the center slightly off focus while there is a ring around it that is in-focus. It can be...
  2. M

    Astigmatism as an Aberration in Optics

    John, Bill, Thanks for the clarification ! It seems I somehow confused astigmatism with the Chebyshev equal ripple effect (mentioned a little while back in another thread)
  3. M

    Astigmatism as an Aberration in Optics

    I thought astigmatism in binoculars is when having multiple areas of focus and unfocus; like appearing in ripples.
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