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Simon2

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  1. On 17/04/2023 at 22:14, PeterW said:

    Convergence for closer objects...... “reverse porro” designs

     

    That helps me with a question I was going to ask I think - I'm cleaning up a pair of very early porros and couldn't understand why the prisms were 'reversed' - but I guess that's it....

    Company that made them associated more with horses and opera glass so that would make sense.

    binos.jpg

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