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  1. a DIY simple VIEWFINDER ...............................

    in case your glass viewfinder is broken, try this:
    take a thin paper. I use paper found in notepads, with a printed grid of 5 mm ...
    a drop of oil. remove excess oil, using cotton. I use olive oil...
  2. Replies
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    Re: New article: guillotine shutters

    thanks .... very instructive ..................
  3. Replies
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    111,038

    Re: New article: guillotine shutters

    nice work .... could you do the calculation if we consider a SLOT , with variable width, somehow like the focal shutter found in SLR ... ??
    Thanks !!!
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