Helping finding a converging lens with focal length of several feet

Discussion in 'Photography' started by Dave, Apr 26, 2007.

  1. Dave

    Dave Guest

    I am building a large camera obscura.

    Can anyone recommend where or how to obtain a converging lens with a
    focal length of several feet (for less than $200)?

    I am open to unique suggestion,s even if they result in some
    distortion of aberration.

    Thanks
    Dave
     
    Dave, Apr 26, 2007
    #1
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  2. Dave

    dadiOH Guest

    I'd browse at Edmund Scientific...
    http://www.edsci.com/

    Especially this division...
    http://www.anchoroptics.com/search/advanced.cfm
    At your price you can count on it.


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    dadiOH
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    dadiOH, Apr 26, 2007
    #2
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  3. Dave

    Pat Guest

    what about stealing the lens out of an old opaque projector. I am not
    recommending this specific one but am using it only as an example.
    http://cgi.ebay.com/DA-LITE-BESELER...8QQihZ001QQcategoryZ15257QQrdZ1QQcmdZViewItem
     
    Pat, Apr 27, 2007
    #3
  4. Dave

    Menno Guest

    Old glasses. I think +1 diopter equals 1m focal length.
     
    Menno, Apr 27, 2007
    #4
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