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Showing content with the highest reputation on 07/09/2014 in all areas

  1. 2 points
    Larger pixels are not more sensitive to light - the A7s's sensitivity ("quantum efficiency") is about equal to that of the D800/A7 - this is why midtone noise on the A7s is the same as the D800/A7r when compared on a per-area basis (via downsampling). What larger pixels do provide, at least with current technology limits, is better Higher ISO dynamic range, which is due to the total lower cumulative read noise from fewer pixels having to be read over the same area vs a higher MP sensor. This translates to lower noise in the shadows. This larger pixel advantage turns into a disadvantage at base ISO because of the read noise penalty from holding a larger charge (full-well capacity). You can read more details at my dpreview thread here: http://www.dpreview.com/forums/post/53860364
  2. 1 point

    5D MKII lowlight

    Some nice looking ML raw lowlight from the 5 years old MKII to remind some of us that we might not need the a7s :P
  3. 1 point

    Nikon D5200 review

    No. Works like a dream... And the Fixed horizontal pattern is still there but i can see it only above iso 8000 or if i push contrast like mad man.
  4. 1 point
    One issue with the microlenses is that they have an associated max aperture, like normal lenses. Producing very large aperture microlenses is difficult and expensive apparently, so commercial sensors have to compromise a bit. The downside of this compromise is loss of light when using large aperture lenses, mostly at f/1.4 and larger. You can read it about it here: http://www.dxomark.com/Reviews/F-stop-blues
  5. 1 point
    That's only because sensors and sensor procesisng ASICs aren't yet fast enough to process higher MP streams for video. It's not a pixel quality issue since those same high MP sensor produce equal or better IQ than their lower MP bretheren for stills, for everything except the very extreme High ISOs (+12,800 for FF).
  6. 1 point
    The typical analogy used is buckets of water. Four small 8oz buckets placed side-by-side hold the same amount of water as a single 32oz bucket. Since the smaller buckets are side-by-side you would expect some loss of water when pouring into them for the gaps in between the buckets; this is where sensor microlenses come in. They act as a funnel to keep water from spilling around the sides of the extra boundaries/edges of the smaller buckets (ie, the funnel light into the photosensitive portion of each pixel, preventing the light from reflecting off the additional edges of smaller pixels). You'd be surprised to learn that the highest-efficiency sensors available right now for any commercial camera are tiny P&S cameras, where they convert 75% of the light they receive, vs 56% for the best full-frame sensors.
  7. 1 point
    "Without compensating technologies, smaller pixels have lower dynamic range, lower fill factor, worse low light sensitivity, higher dark signal, and higher non-uniformity." Source: Standford Research Paper
  8. 1 point

    5D MKII lowlight

    Why aren't more people talking about this? I totally agree. I wonder if 422 via HDMI will improve things at all?
  9. 1 point

    Nikon D5200 review

    Now the Annoying Fixed horizontal pattern noise is GONE!!! The "Video HQ 40mbps Bit-rate" fot Nikon D5200 hack did it.. The noise is now like in D5300.
  10. 1 point
  11. 1 point
    Kendy Ty has 666 Likes, 66 Channels, 66 Groups, and 666 Following. W. T. F.
EOSHD C-LOG and Film Profiles for All Canon DSLRs
EOSHD Pro Color V4 HDR for Sony cameras

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