Pixel quality vs quantity

Discussion in 'Photography Equipment & Products' started by ksmattfish, Oct 31, 2008.

  1. ksmattfish

    ksmattfish Now 100% DC - not as cool as I once was, but still

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    I was looking at the review of the new Canon 50D at dpreview.com. For all the talk of better high ISO performance the high ISO raw file samples from the 40D look much cleaner than those of the 50D (at the link below, scroll down).

    http://www.dpreview.com/reviews/canoneos50d/page18.asp

    Now I understand that higher res is supposed to cover some of that up because the enlargement factor is less, but man! there's a pretty big difference at ISO 800 and higher.

    In their conclusion they say the 40D beats the 50D in dynamic range and noise.

    I'm curious as to what this means for the 5D MkII. It's got almost twice the resolution as the 5D, but will that make up for the reduced photo receptor size. I'm going to be looking at it hard before spending my moola. I need clean high ISO performance more than I need high resolution. I may be happily sticking with the obsolete, price reduced 5D mkI.
     
  2. keith204

    keith204 No longer a newbie, moving up!

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    Interesting. A few weeks ago from online samples, I had been convinced that the 50D ISO was better than the 40D (which I own). Lately I saw some shots from a friend who has the 50D, and there was a heck of a lot of grain at 3200 and 6400. It does look like the 5DMKII will be quite a bit better, but the reason I'm on the list is mainly for upcoming video opportunities that will pay well if I am equipped. You bring a good point for people only needing a better still DSLR.

    I will say that the higher resolution LCD on the 50D is SLICK, so that's something I look forward to on the 5D MkII
     
  3. lostprophet

    lostprophet No longer a newbie, moving up!

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  4. Village Idiot

    Village Idiot No longer a newbie, moving up!

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    Well remember, the 5D MKII's 21mp ff sensor is 1.6x bigger than the APS-C sensors in Canon's lineup. I believe that I have read some where that the 5D MKII's sensor is equivalent to an 8mp 1.6x APS-C sensor as far as pixel size/density goes.
     
  5. Ls3D

    Ls3D TPF Noob!

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    you do not have permission to access this page. This could be due to one of several reasons:
     
  6. Village Idiot

    Village Idiot No longer a newbie, moving up!

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    That would be a member's only page that he posted links to.
     
  7. Ls3D

    Ls3D TPF Noob!

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    Ok thanks, I lost my members only jacket in 1994! :lol:
     
  8. Alex_B

    Alex_B No longer a newbie, moving up!

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    It has got about 30% higher pixel resolution, not twice.
    12.8 MP -> 21 MP gives you a factor of roughly 1.3 in pixel line resolution.

    just to clarify.
     
  9. djacobox372

    djacobox372 No longer a newbie, moving up!

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    Sensor size is more important to quality then the number of pixels, especially when it comes to high-iso noise performance.
     
  10. Dubious Drewski

    Dubious Drewski TPF Noob!

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    I'm telling you guys, High ISO performance always trumps megapixels when it comes down to overall quality.
     
  11. lostprophet

    lostprophet No longer a newbie, moving up!

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    here is the D700 shot

    ISO 3200 100% crop

    [​IMG]
     
  12. Dubious Drewski

    Dubious Drewski TPF Noob!

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    I think it needs repeating: The above image is a 100% crop at ISO3200. See this is what I'm talking about! This quality is spectacular!
     

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