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Any Colour You Like So Long As It's Black (And White)!

Discussion in 'Leica Camera Chat' started by Alex1994, Mar 14, 2012.

  1. Alex1994

    Alex1994 Well-Known Member

  2. P_Stoddart

    P_Stoddart Well-Known Member

    Trying to figure out what is gained by a pure B&W sensor? Massive DR?

    My understanding is photo editing software can already take advantage of the DR of colour sensors anyway.

    I have read on other forum posts that the human eye can only pick around 256 level of tone anyway in a print.
  3. beejaybee

    beejaybee Marvin

    Twice the resolution, in the red and blue layers of the image, and about 1.4 times the resolution in the green layer, for the same pixel count. No need for a blur filter to spread the light around over the Bayer matrix. Ability to work with narrowband monochromatic filters, or broad bandpass "colour" filters, from some way into the ultra violet to some way into the infra red. And you can still make colour images, if the subject will stay still enough for you to take three images using red, green and blue colour seperation filters ... or false colour images, using three different filters (possibly narrowband monochromatic filters) and mapping the images onto red, green and blue for display or printing.

    All those wonderful "colour" shots from the Hubble Space Telescope ... made with monochrome cameras.

    One shot colour cameras really do have severe limitations, redeemed only by the ease of producing straightforward colour images.
    Last edited: Mar 14, 2012
  4. beejaybee

    beejaybee Marvin

    That's irrelevant; applying tone mapping can map far more than 8 stops of dynamic range onto a 256 level printed / displayed scale, and much of the dynamic range is thrown away if you use the sensor above its "native" speed anyway. The native speed of camera sensors is around 100 ISO; even the ones that can be pushed to 1000 times that.

    But monochrome sensors are essentially the same as one-shot-colour sensors with a different anti-alias / blur filter and the Bayer filter matric stripped away. The dynamic range is the same; usually 12 or 14 bits. They may be more efficient at photon capture but that has no effect on the dynamic range.
  5. bagpuss

    bagpuss Well-Known Member

  6. P_Stoddart

    P_Stoddart Well-Known Member

    So would you say that there is nothing to gain or very little? I mean colour FF sensor are already quite high res.
  7. Alex1994

    Alex1994 Well-Known Member

  8. beejaybee

    beejaybee Marvin

    Query, a Phase One back modified for monochrome? And it's immensely expensive. Dedicated "large sensor" astro cameras are very, very much cheaper, you could buy half a dozen of these for the same money and not have to pay import duty either.
  9. Alex1994

    Alex1994 Well-Known Member

    I won't buy one now! :):)
  10. Brian

    Brian Venerable Elder

    And next will be that ISO is limited to 400ASA and the memory card holds 36 exposures.................................wonderful.
  11. gollum

    gollum Well-Known Member

    Works for me :)

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