FF versus APS-C bokeh

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

  1. A_Lee

    A_Lee Guest

    Joined:
    Sep 29, 2008
    Messages:
    2,239
    Likes Received:
    0
    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

    Joined:
    Feb 20, 2007
    Messages:
    4,549
    Likes Received:
    490
    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

    Joined:
    Sep 29, 2008
    Messages:
    2,239
    Likes Received:
    0
    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

    Joined:
    Feb 20, 2007
    Messages:
    4,549
    Likes Received:
    490
    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).
     

Share This Page