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|    sci.optics    |    Discussion relating to the science of op    |    12,750 messages    |
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|    Lou to All    |
|    Focal length?    |
|    02 Nov 23 08:19:01    |
      From: noelturntive@live.co.uk              I am short sighted so anything at arms length or beyond is *completely* out of       focus.       Just noticed though that if I hold a pair of reading glasses ( not mine as I       don’t need them for close up vision) at arms length the frame and everything       around is out of focus as usual but the image coming through the lens of the       background scene is        in complete 20:20 sharp focus .Albeit upside down.       Cant quite figure out how this works. Is it something to do with the focal       length in my eye between the lens and retina?              --- SoupGate-Win32 v1.05        * Origin: you cannot sedate... all the things you hate (1:229/2)    |
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