FF versus APS-C bokeh

Discussion in 'Photography' started by A_Lee, Apr 12, 2010.

  1. A_Lee

    A_Lee Guest

    If two identical shots were taken, one with a FF body, and another with a crop body, would there be a difference in the quality of the bokeh?
    Assume, the same subject, focus points, lens, aperture, etc.
  2. Ibn

    Ibn Supporting Member

    Yes. The bokeh on the FF body would be slightly better due to the shallower depth of field (about 1 stop's difference).
  3. A_Lee

    A_Lee Guest

    Is it due to the idea that on a crop body @ 18 mm, you'd actually be shooting at 29 mm in 35 mm format? Where as on a FF, you would be shooting at 30 mm?

    Dude Eric, you and Art are just a plethora of information, and knowledge! Love it!
    I hope to be like this someday!
  4. Ibn

    Ibn Supporting Member

    18mm on FF = 18mm
    18mm on EF-S = ~29mm

    It's almost akin to moving your subject matter further away from the background (separation of subject from background), producing a creamier bokeh.

    The rest of it comes from the size of the photosite as well as the density.

    Lastly, this one doesn't have to do w/the sensor on the body, lens construction and blade counts also affect bokeh. The 85mm f/1.2 has a smoother bokeh vs. the 85mm f/1.4 or the f/1.8 due to the blade count and orientation (the rest is due to the type of glass used).

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