A while ago I read an extensive article on the web about bokeh. If I
remember right, much boils down to the the form that the aperture blades
take when stopped down. The more blades there are, the more you'll reach
a perfect circle of 'diffusion'. That's already a step ahead towards
nice bokeh.
Another aspect may be relative brightness of the diffuse light towards
the centre or the edges of the circle. No idea which parameter controls
that... probably general lens design issue.
It may be just a wild idea, but I have the feeling (not supported by too
much experience) that the simpler a lens is on the optical design, the
nicer the bokeh. A lens that is tweaked and forced to perform with high
speed and high sharpness in a compact barrel is probably bound to
perform weaker when bokeh is coming into the picture (i.e. out of focus).
Saying this, my first hint would be to go for prime lens, not too fast,
maybe a nice Takumar. Aside from that, digital lens may be good as well,
since those lenses are less glass in the same housing, which allows a
more simple optical design.
Note, this is even not two cents worth...
Groeten,
Vic
Leon Altoff wrote:
Hi all,
I'd like to try and find some information on the bokeh of lenses before
I go out and buy one. Apart from asking on the list if any one has an
example of the bokeh produced by a particular lens, are there any sites
with examples or listing lenses with good and bad bokeh?
In particular I've been thinking of getting a 300mm lens for use with
birds and similar small wildlife - ideally I would like a super sharp
100 - 300 f4 constant zoom (possibly optimised for digital to make it
lighter). Sigma make one and I was thinking of it (you can't find it in
any camera stores in Australia to try first - at least I haven't) until
I saw an image taken by one of the list members, which I thought had
some rather nasty bokeh.
So how do you find lenses with good bokeh before going out and buying them?
Leon
http://www.bluering.org.au
http://www.bluering.org.au/leon
Norman Baugher wrote:
To answer the question - use a lens that produces good bokeh?
Norm
From: "Tim Øsleby" <[EMAIL PROTECTED]>
Gonz is onto something when he points at the harsh bokeh. So now I
wonder:
Is there anything I can do to make it less harsh in Phootoshop
(Elements 3)?
Gaussian Blur is one obvious answer. It helps, but it does not take
it right
where I want.
Does anybody have some input on this?
