Welcome to Tea with Didi

Jan 20, 2020


  • Goldman Behrens posted an update 1 year, 5 months ago

    We are now living in a time of wonderful technological advancements in the visual technology fields. Photo camera models renew themselves each year together with the promise of more mega-pixels and extra features. And yet, if we consider it as it were, the photo links from much of our digital camera models usually has weaknesses and strengths that persist through every one of the successive appliances go through our hands.

    Digital camera models plus general all photographic cameras are, despite all the marketing buzz, still not a lot of machines. For example, they register the world with sensors that may only capture a part of the tonal range that our eyes can perceive.

    Imagine your self a sunny day in front of a beautiful landscape. Below you, around your feet, you will see the rich lush green vegetation; above you, the intense blue skies. As we contemplate this scene, our eyes can perceive its richness, the details both in the shadows as well as the bright clouds above. The dynamic range that our eyes can process, which matches from your darkest on the brightest areas, is enough to contain most of the rich detail in this scene.

    Now take your photo camera and snap a shot from the position including both vegetation as well as the sky. It makes sense very telling. With regards to the parameters that either the digital camera or else you choose, some detail from the scene will disappear in the result. Either parts of the vegetation will blend to black and lose all detail or parts of the sky will blend to white and lose all detail.

    To sum up, the retina of the camera, its digital sensor, which captures the light of the scene, is not able to getting through a tonal range the size of our eyes can. It can only capture the entire detail in a smaller range that can be positioned at different amounts of brightness through the camera itself or us. Because of that, in a scene such as the one described above that has a substantial contrast, it eventually ends up capturing the detail only at the highlights and mid-tones, or mainly on the mid-tones, or mainly at the shadows and mid-tones. It simply cannot capture simultaneously the entire detail in the scene in the darkest on the brightest areas.

    This is naturally a simplification of an scenario that we could describe in much more detail. However the conclusion remains to be the same. When we consider the final photo, we realize that what we remember seeing with your eyes just isn’t exactly what the photo shows. That richness of detail everywhere is gone. Which is just one of the limitations that all Photo cameras share. We might go on to describe many others in connection with color precision and other locations cameras just can’t manage the depth and richness of the world around us.

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