Hi Kristian,
Yes, I saw it with the 43 also, and your photo shows it nicely.
And it's a quality I've seen in photos taken with Leica lenses too.
It's well discussed that great bokeh has been associated with a degree
of spherical aberration, and in fact the 105 F2 DC Nikkor portrait lens
actually allows the user to "dial in" some spherical aberration. Since
what we're looking at happens differently off axis, and appears to
revolve around the center axis of the lens, I wonder if this is indeed
just a picture of spherical aberration? This is probably why the lens
exhibits such nice background blur at larger apertures with smooth
transitions when there are no real highlights but just more even tones.
Is it literally distorting the background and blurring it into the next
tone like an artist who would be smearing wet paint? We need a lens
guru for this one.
Thanks,
Ed
http://lightandsilver.com
> -----Original Message-----
> From: [EMAIL PROTECTED]
> [mailto:[EMAIL PROTECTED]] On Behalf Of Kristian Walsh
> Sent: Saturday, January 05, 2002 6:13 PM
> To: [EMAIL PROTECTED]
> Subject: Re: 77 specular bokeh talk (again!)
>
>
> Hi Ed,
>
> I agree, and I've seen this with pictures taken with the 43 too. The
> only example I have isn't as clear-cut as yours, but if you
> compare the
> shape of the spots in the top right to those at the top of
> the frame in:
>
> http://homepage.mac.com/walshk/moira.jpeg
>
> ...you might see it.
>
> The distortion is very slight, and I only notice the squashing of the
> highlights with the lens wide open. Once stopped down, it's very
> difficult to see a difference. Nothing I'm losing sleep over, and far
> outweighed by the wonderful pictures this lens produces...
>
> --
> Kristian
>
>
> On Saturday, January 5, 2002, at 10:26 pm, Ed Mathews wrote:
>
> > Just when you thought it was safe to go back in the
> water..... A week
> > or so ago there was some limited <g> discussion about the
> Nikon 105,
> > it's bokeh, and the 77 bokeh. I mentioned that the 77 yields nice
> > bokeh, with some football (American football) shaped highlights.
> > Nobody commented about that, and probably nobody understood what I
> > meant. So I thought I'd take a picture of my Christmas tree lights
> > out of focus to show you.
> >
> > This is background bokeh, with the brightest lights about 7
> feet away,
> > and the lens focused to about 3 feet. In this shot, the lens is at
> > F2.8. In other shots I took at smaller apertures, the
> highlights of
> > course get smaller, and the football shapes start to get more round.
> >
> > It appears to me that the shape becomes more oblong closer to the
> > edge, and that they kind of look like they circle around the center
> > axis. Tell me what you think.
> >
> > http://lightandsilver.com/Temp/77.htm
> >
> > Thanks,
> > Ed
> > http://lightandsilver.com
> > -
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