A&P DOF/FOV/Compression Illustration. FF-vs-1.6x

Discussion in 'Lifestyle' started by adamlewis88, Nov 22, 2008.

  1. adamlewis88

    adamlewis88 New Member

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    All shots were taken with a 5D and a 50D. I simply filled the VF the same with both cameras, made sure they were composed the same, used the same EV settings, and took some shots

    Exhibit A: 1 Object, Random background
    5D
    [​IMG]

    50D
    [​IMG]

    Exhibit B: 2 Objects
    5D
    [​IMG]

    50D
    [​IMG]

    Exhibit C1: 4 Objects, 50mm
    5D
    [​IMG]

    50D
    [​IMG]

    Exhibit C2: 4 Objects, 85mm
    5D
    [​IMG]

    50D
    [​IMG]


    Holler~!
     
  2. Gvidon

    Gvidon New Member

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    Interesting...
     
  3. ericande

    ericande Active Member

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    I knew there was a difference, didn't realize it was quite so profound. I guess this ends the argument that one dude was trying to make.
     
  4. ok_computer

    ok_computer OT Supporter

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    And this is why Medium format beats the shit out of FF digital.
     
  5. ok_computer

    ok_computer OT Supporter

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    Well, one of many reasons
     
  6. Bloke

    Bloke Banned

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    i just bought this fuji camera, and want to know the workflow.
    i know what to do with slide film and black and white negs, but what do i do with c41? does the lab just give a contact sheet or something? im lost here.
     
  7. jared_IRL

    jared_IRL OT Supporter

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    wait...

    so you mean they're not exactly the same!?! :rofl: :bowdown:
     
  8. Girth

    Girth ¯\_(ツ)_/¯ OT Supporter

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    FF time. :noes:
     
  9. FindersKeepers

    FindersKeepers New Member

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    so basically you just showed me that FF has more photo to the same dimensions (which I already knew), and is less sharp than 1.6x
     
  10. xenon supra

    xenon supra OT Supporter

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  11. Girth

    Girth ¯\_(ツ)_/¯ OT Supporter

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    in for the same test... this time w/ D700 and D300 :x:
     
  12. Bloke

    Bloke Banned

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    its not less sharp, just less in focus. he had to hold it closer.
     
  13. adamlewis88

    adamlewis88 New Member

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    Plus it was hand held, hunched over, and not caring about getting that very first can in crystal clear, tack-sharp focus. It doesnt need to be for me to illustrate my point.
     
  14. adamlewis88

    adamlewis88 New Member

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    Its gonna look the same. Im not sure if we have anything thats fast and of the Nikon variety at work. Ill look next time Im there. If weve got something decent, Ill do it

    I suppose we do have the 70-200 I could use...
     
  15. CRC

    CRC New Member

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    well of course they will be different because you moved closer to fill the frame with the 5D. If you took a shot at the same focal length and distance, then cropped the 5D to look like the 50D the pictures would be exactly the same.
     
  16. tenxia

    tenxia OT Supporter

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    hmmm
     
  17. adamlewis88

    adamlewis88 New Member

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    Ok?


    Thats not the point I was trying to show. Why would anyone buy a FF camera and then purposely always stand back and crop stuff? :ugh:
     
  18. FindersKeepers

    FindersKeepers New Member

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    makes more sense... I didnt know it was handheld :o
     
  19. Tedrzz

    Tedrzz New Member

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    Of course the DOF is going to be different. When you change the distance between the sensor and the object the DOF will change. Has nothing to do with the FF sensor.
     
  20. jared_IRL

    jared_IRL OT Supporter

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    what it has to do with the FF sensor is that the size of the sensor is what forces the change in DOF.

    The objects are framed identically in the photograph, the focal length is identical, and all camera settings are identical.

    The ONLY variable between those photographs is the size of the cameras sensor.

    The question these images are pertaining to is this:

    If you were to shoot the same objects in the same situation with a ff camera and a crop camera, would the images appear different in terms of DOF and perspective?

    The answer is YES.

    But you are correct in that the difference is largely in the photographers perspective in regards to the subject. However, it is the size of the sensor that dictates this.

    The question here isn't really whether it is technically possible to recreate the results of a 5d with a 50d. The question is, if you were shooting a person, do the perspective and dof change with larger sensor sizes.

    Again, the answer is yes.

    I mean sure, you could, technically, shoot all of your images wide and crop them down, but then you are essentially using your ff camera as a crop camera, because you're discarding 20% of the available pixels in your images. What the hell would be the point of that?
     
  21. adamlewis88

    adamlewis88 New Member

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    Thank you. I had no clue this would be so hard for people to look at!
     
  22. g33k

    g33k OT Supporter

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    technically dof is not a function of sensor size but of lens specs - focal length and f number. but since a longer focal length is needed on a ff to produce the same fov as on a crop the dof is shallower.
     
  23. Girth

    Girth ¯\_(ツ)_/¯ OT Supporter

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    Haaaaaay, let's argue!
     
  24. mikeskillz

    mikeskillz New Member

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    yes. that, and where you were standing. do you know what a variable is?

    just so everyone is clear. a FF sensor requires the photographer to physically stand in a different position to frame the scene so that it appears the same as it would on a cropped sensor. this is where the changes in DOF come from.
     
  25. Tedrzz

    Tedrzz New Member

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    :werd::werd::werd::werd::werd::werd::werd:
     

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