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  1. tenex

    Vignetting in Binoculars

    Let me try again: if even significant vignetting is so hard to notice, how are you detecting a secular worsening in the last two decades? I was hoping you could specify what models you've tested and how, etc. Perhaps by using Holger's method described here? No, I was asking to what extent...
  2. tenex

    Vignetting in Binoculars

    I was looking forward to your starting this thread. First a basic observation that may not be immediately obvious: the asymmetry of the "almond" pupil in photographs is an artifact of the direction the bin is tilted, and must be mentally rotated through 360° to give an idea of overall...
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