Let's assume a thin lens and an object O in focus at a distance of dO from the lens. Further, let's assume there's a large out-of-focus background object B at a distance of dB. Now, we know ...
Has anyone tried to shoot videos with blurred backgrounds using the Nikon D5100. I am trying to shoot cooking video, but with the a blurred background. I have 18-55mm f/3.5-5.6 AF-S DX VR Nikkor Zoom ...
Possible Duplicate: How can I maximise that “blurry background, sharp subject” (bokeh) effect? I am trying to achieve clear and sharp shot of a static object on a very blurry ...
Possible Duplicate: Technically, why is the out of focus area blurred more when using a bigger aperture? Why is it that a larger lens aperture produces a shorter depth of field, causing the ...