Curved Field vs Flat Field projector lenses

Discussion in '35mm Cameras' started by Paddleman, Jul 10, 2003.

  1. Paddleman

    Paddleman Guest

    I was looking thru Adorama's page and came across two Kodak projector lenses.
    One was a 102/2.8 "Curved Lens" the other a 100/2.8 "Flat Lens" and they both
    had similiar numbers and the same selling price. Please help me understand the
    differences in these lenses and their different uses.

    Regards,
    Gary
     
    Paddleman, Jul 10, 2003
    #1
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  2. Paddleman

    Bhup Guest

    If you are projecting onto a flat screen then a flat field lens..
     
    Bhup, Jul 10, 2003
    #2
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  3. Paddleman

    J.D. Parker Guest

    I second that.

    With CF lenses and current generation slide mounts you will either
    have the centre of the image or the periphery in focus - and it gets
    boring (quite quickly) playing with the focus.

    Jonathan
     
    J.D. Parker, Jul 10, 2003
    #3
  4. Paddleman

    Bhup Guest

    Curved field lens.. I guess a curved film .( but curved in the correct
    direction the centre of curvuture must be towards the lens) is projected
    onto a flat screen .
    optically you have the same a flat film produced points of focus in an arc.
    Curved film -> Flat sceen or Flat Film -> curved screen --- then who has
    curved screens.


    where as a flat field lens produces pints of focus from a flat film and then
    on a flat screen
    Flat Film -> Flat screen

    Ok I'm being daft no offence to those who still believe the world is flat
    unless viewed through a curved field lens :)

    B


    ..
     
    Bhup, Jul 10, 2003
    #4
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