Brian wrote:
> I also think this is a great photo, and I also think that bokeh doesn't
> really
> enter this discussion.
>
> What we see is an interesting and artistically satisfying blend of movement
> and of stationary objects in the one image.
>
> For someone who enjoyed studying physics at Uni even though my
> competence in maths was awful (but I passed due to being able to visualise
> processes very well) I find the image of the sound-wave-generating motion
> of the guitar strings fascinating and it reminded me of how spanish-style
> guitarists generate harmonics by lightly fingering a sounding string on the
> exact point of the particular harmonic sought.
>
> Bokeh to me refers to the rendering of out-of-focus background material
> which may have a blend of highlights and dark patches.
>
Brian, first of all, I have to comment on that playing technique--that's one
of the finest sounds I've ever heard and have always found it to be an
incredible experience to hear and see it in person. I've met only one
musician that had it mastered and the beauty of the sound was immense. I was
in charge of miking the guitar and was floored by the sound. We ended up
using two sets of mikes--one for the recording and the other for the sound
system.
As to the physics and so forth, well, the strings in this case are actually
not moving more than just a few mm, but that really is bokeh. What you are
seeing is the linear application of bokeh both in front of and behind the
plane of focus. You bring up a point which I hadn't thought of, and that is
with this picture the optical traits of the lens formed an effect on the
image which mimicks the effect of the guitar strings in motion. There is
implied motion in the photograph. I wish I had been able to capture the
string movement (and in other pictures I actually did to some extent), but
I'm not that good.
I've never in my life taken a photograph where the bokeh remained linear and
hard-edged forming the patterns seen here. This one is a fresh experience.
AG
--
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