HI,
Orite. get it. so shallow DOF is controllable while bokeh is more of the characteristic of the lens. Right?
Cheers,
Shaz
hi all, this is psychobiologist here answering on behalf of proteonxpr, dont wanna log in my main account later admin think i m a clone. overseas now and she is using my com.
when people talk about bokeh, it could be distinctively different from a shallow DOF. a shallow DOF means its thin, you have a few centimetres of DOF, but a higher dof like a metre odd does not mean its impossible to have good defocussed background (using a telephoto lens).
how good bokeh is, is not only a lens characteristic, but how you use it in your picture and how you would place the background.
A telephoto lens will always have the typical creamy bokeh, that is because in the background, the angle of view of contribution to the background bokeh with respect to subject size, is narrow, maybe a couple of degrees. wider angle bokeh is more fun, that the angle of view contribution to the out of focus regions is march larger (50-70 degrees), but this is also a matter of how you then would compose with each lens, there are many people whom can produce great bokeh and pictures with the cheap 50mm f1.8D
how good the defocus and blur of the background bokeh behind the subject, is also dependent on how far away background objects are, i.e. a subject near to infinity focus distance will have lesser background blur and bad bokeh, but a subject that is nearer to camera, and infinity focal distance is far into the background.. you get better defocus & bokeh
aperture blades and lens coatings will show up as flaws, as long as the out of focus regions in the background has intense light sources or reflections, you get the shapely spots, but if background is low light and doesnt have these intense light sources, you will have less of that. its not so much of the shape of bokeh only, some have the roundest aperture blades but an outline of the circular spots will often make the bokeh coarse and edgy.
out of focal region contrast also plays a strong role in how good a picture's background and bokeh is as well, like when i use a confocal microscope (nikon/zeiss) the pinhole serves to reduce the brightness of the out of focus regions (we hate bokeh!!), giving you a clean well contrasted image. without the pinhole, the out of focus lights is high in intensity and contrast, your subject will not stand out from the brighter background
complicated complicated. :bsmilie: but in the nikon optical line up, i suppose sharpness and resolution is something they are after, the bokeh's only better on lenses that are considered to be professional ones and on the longer focal lengths usually
