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  1. yarrellii

    Difference in View Size: 8.5x42 and 8x30

    Here is an old thread, from 2005, about this (which oddly enough references to an even older thread about this): https://www.birdforum.net/threads/porro-and-roof-object-size.28391/ So apparently, this is an impression being reported by many users.
  2. yarrellii

    Difference in View Size: 8.5x42 and 8x30

    I think I remember reading several forum members stating how switching between Porro vs roof binoculars of the same magnification, say 8x vs 8x gave the impression of viewing smaller image through the Porro, as if one was truly 8x but the other slightly less. I have had exactly that experience...
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