Previous versions of brainiac's message #4593911 « Where does the 3D look come from? »
brainiac Offline [X]
Re: Where does the 3D look come from?
There is another candidate for the 3D effect. If you look at the lighthouse picture, you will notice a dark line down the right hand edge of it. The sun is well off to the right, so that line is NOT shadow. Close to 90° incidence many surfaces begin to behave like mirrors. Presumably that light is very polarised. It is a bit like a mirage. With Zeiss lenses you can quite often see background light \'clinging\' to the edges of a foreground subject. It even happens with skin. I first noticed this effect with my first Hasselblad twenty years ago. When I compared my Leica 180f2 with my Zeiss 200f2 I noticed that the Leica did this less, if at all. Bokeh goes funky round the edges of things. Maybe Leica lenses reduce this effect to increase the smoothness of the transition to blurry bokeh. The weird thing about this effect is that if I look carefully at focus transitions with my eyes, I see it in real life too. It seems to be a feature of light\'s wavelike nature.
Try it yourself: hold up a pencil at a slight angle to a dark/light transition a way behind it and look at the edge of the pencil where the background line crosses it. You may see the background line bend a bit as it clings to the edge of the pencil. Here are two lens examples:
Jun 17, 2007 at 03:41 PM
Previous versions of brainiac's message #4593911 « Where does the 3D look come from? »
