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.

    Paddleman, Jul 10, 2003
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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
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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.

    J.D. Parker, Jul 10, 2003
  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 :)


    Bhup, Jul 10, 2003
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