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You know I am probably missing something here but this
question about digital camera lenses seems to be easily resolved
empirically. You all have seen thousands of digital images, many
taken with a Coolpix, so you have all the evidence right in front of
you. Have any of you seen an image that manifests the effect that is
being discussed or shows in the example? Of course not. David's
comment about the lens in the article being telecentric front and back
is very valid. Camera lenses just aren't designed that way. Don David Dyer-Bennet wrote: On Fri, October 16, 2009 04:19, karl shah-jenner wrote:this is doing my head in.. http://www.lhup.edu/~dsimanek/scenario/labman3/telecen.htm you have *got* to see the image on this page using a real telecentric lens - the distant part of the object appears larger than the close part !Okay, that picture is really scary! I hadn't realized you could vary the rendering THAT much in lens design! Is that a result of being "double telecentric", though? What's beneficial to digital sensors is only on the sensor side, not on both sides. |
