>>2668721Eeeh you need the very basic tutorials.
http://www.cambridgeincolour.com/tutorials.htmhttp://www.cambridgeincolour.com/tutorials/depth-of-field.htmTo put it easy:
- bokeh shape (balls) is determined by the shape of the aperture
- bigger circle = more space for the light to go in = the light goes all weird in most directions except the part where you focused the lens. Bigger circle = faster lens, so that's why aperture has to do with it.
- LESS depth of field means MORE borkehylicious images.
- General rules:
Closer to the subject: less DOF.
Faster aperture: less DOF
Longer lens: less DOF
Bigger sensor: less (perceived! the lens is still projecting the same image) DOF
The opposite is true. Longer lenses usually have a more creamy bokeh. Wide angles have bad, outlined and busy bokeh. Medium format and large format film has exceptionally pleasing and special rendition of out of focus areas.
- While bokeh helps hide distracting elements, many of the best pictures in the world have a very extensive depth of field and the photographer worked his ass off to align all the composition elements to perfection. That's what you need to strive for, not borkheyballs.