Any still camera that costs over $500, or any video camera that costs over $1000 (more or less) will have a lens that doesn't need to focus on everything (infinity) and can produce those results.
I do own a Nikon D40 so I know that there are focus points in the view finder, but I have never used a professional quality video camera to know how that works.
The D40 is a professional quality camera! What happens is the lens focuses on something at a certain distance away, and everything that isn't at that distance (either too close or too far) is out of focus.
It's like an eye. Put your hand in front of your face. Now focus on the computer screen. Notice how your hand isn't really clear. Now focus on your hand. Notice how the computer screen isn't really clear? Expensive lens' do the same thing.
Any still camera that costs over $500, or any video camera that costs over $1000 (more or less) will have a lens that doesn't need to focus on everything (infinity) and can produce those results.
It's a little more complicated than that. Depth of field has just as much to do with the imaging sensor as it does with the lens.
How so? With the exception of 3CCD vs CMOS, and perhaps sensitivity to light, all sensors are about the same. an iPhone sensor with a high-end lens isn't going to be much different (relatively speaking, of course) from a D90.... is it?
from DIGITAL CAMERA SENSOR SIZESDEPTH OF FIELD REQUIREMENTS
As sensor size increases, the depth of field will decrease for a given aperture (when filling the frame with a subject of the same size and distance). This is because larger sensors require one to get closer to their subject, or to use a longer focal length in order to fill the frame with that subject. This means that one has to use progressively smaller aperture sizes in order to maintain the same depth of field on larger sensors. The following calculator predicts the required aperture and focal length in order to achieve the same depth of field (while maintaining perspective).
It is also the size of the sensor, that is important. The iPhone 4s has a much smaller sensor than the D90:
from DIGITAL CAMERA SENSOR SIZES
But my understanding is that the size of the sensor doesn't change whether or not an image is in focus, just whether or not what's cropped into focus. A sensor is, in its most basic sense, just a collection of light sensing receptors...
the size of the sensor directly affects the amount of depth of field.
The size of the sensor does NOT affect the depth of field.
It crops the image. That's all.
So to compensate for this cropping effect you, for example, use a 20mm lens instead of a 40mm lens. Using the shorter-focal-length lens at the same subject-object distance is what will affect your depth of field.
Of course achieving that shallow DOF "film look" is possible with smaller sensors, but it is vastly different than from something like a full frame DSLR.
Don't forget, that links with additional information are not liked by many people, it needs extra effort to click them and actually read and understand the context presented there.Really don't see why this is down voted. It provides links to relevant material?
Don't forget, that links with additional information are not liked by many people, it needs extra effort to click them and actually read and understand the context presented there.
Those many people like to be spoonfed.
Waiting for another ten down votes. If you can manage clicking that button, you can actually click a link or two. But reading them, hmm, yeah, I see the fallacy.
Onto FacialBukake, crying about internet cruelty.
What happened to the days of having to find information! I'm only young but mostly everything I have learnt I have had to find. Spoilt for choice on here!
It's funny that people don't like the extra effort yet I doubt they consider the effort that you have had to put in to go to three different sources and get the links!
depth of focus, wonder how useful it is in porn.. interesting really
Anyway, back to the thread: Focus pullers will be a thing of the past with this.
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Seen the Lytro but not convinced at the moment. You may lost a production focus puller but maybe a new digital focus puller will be created because someone would still have to decide what area is in focus and it could be just as complicated if when mixed with video matching the focus to a moving object!