"3D look" is just a stand-in catch-all phrase for a conglomeration of lens qualities, notably sharpness, clarity, and contrast. It's not a useful term, because other factors such as depth of field and composition have greater effect.
I think that "3D look" is what some people think of as the "Heliar look"--very smooth out of focus background with a very sharp subject that seems to pop out, in part the result of having a sharp design and a certain amount of uncorrected spherical aberration. In catalogue descriptions of classic large format lenses from the age of soft focus, some are described as having a "plastic" look, which I think points to the same thing. The effect depends on aperture and subject distance, and can be played up with lighting and other elements.
If I understood the OP question I might post a reply. However this thread seems to have veered away from the original post. Please people, stay on topic or start your own thread.
The OP offered some examples of what he meant by "the 3D look" but no definition. From the examples given it appears to me that the OP is simply looking for short DOF....which is, of course, more about how the photographer uses the equipment than about the specific equipment used.
w.r.t. the off topic content, I agree. There is some interesting history being discussed. Surely, it deserves its own thread.
I use the Jupiter 12 in both the Kiev mount and LTM. Both are quite sharp and contrasty fine lenses. They DO NOT have any 3D qualities I've noticed. HOWEVER my Leitz 35mm Summicron DOES have that quality.
All the best,
Buy longest lens possible you can use with aperture of f2.8 or wider. best way to get compressed, out of focus backgrounds, devoid of recognizable objects. makes stuff pop with sharp accurate focusing!
I've noticed that photographers who are accustomed to shooting the relatively slow
zoom lenses found on today's cameras are impressed by the shallow DOF produced
by faster primes which we who shoot "old fashioned cameras" often take for
granted. They often call this a "3D look" because it provides a visual sense of
depth to an image. Some also use terms such as "pop" to describe it.