What you describe is a selective focus effect but the out of focus background is still viewed on same plane as forground, it would look totally different with 3D photograhy, the forground would not only be in selective focus, it would be "popped out" in front of the background.
For those who have never seen 3D photography or havent in seen it a long time, The thing to remember is that with 3D photography, infinity looks the same as 2D in 3D, objects that are closer than infintity look "popped out" off the infinity background. No 2D process does this with any lenses no matter how good, so I simply do not agree with saying any 2D lenses have a a "3D quality" or effect. "Realistic Selective Focus" might me a better term for the effect they are trying to describe. JCO -----Original Message----- From: Paul Stenquist [mailto:[EMAIL PROTECTED] Sent: Friday, November 12, 2004 8:15 AM To: [EMAIL PROTECTED] Subject: Re: 3D quality in a lens? If you shoot a foreground object with a long lens wide open, it separates from the background in such a way as to produce an apparent "3D" effect. Of course, as JCO points out, it's not really 3D. It's merely the eye recognizing a difference between a sharp foreground and an out-of-focus background. Lenses with nice bokeh, like the 77 limited, do this quite effectively. With extremely long lenses, like my A-400/5.6, the effect is very easy to achieve. Here's an example: http://www.photo.net/photodb/photo?photo_id=2875014 On Nov 11, 2004, at 10:33 PM, J. C. O'Connell wrote: > If you have ever done or seen any decent > 3D photography you would know it's a really > dumb way to describe any 2D image. I wouldnt > read too much into it, or put too much trust > in the writers of just descriptions... > JCO > > -----Original Message----- > From: Don Sanderson [mailto:[EMAIL PROTECTED] > Sent: Thursday, November 11, 2004 10:23 PM > To: PDML > Subject: 3D quality in a lens? > > > What is meant when a lens is described as having > a "great 3 dimensional quality"? > Or "it gives photos a 3 dimensional feel"? > I've heard this term used several times in describing > lenses, mostly WA's. > How does a lens lend a 3D quality to a photograph? > > TIA > Don >
